Class / Patent application number | Description | Number of patent applications / Date published |
585315000 | With hydrocarbon recycle from later to earlier synthesis | 48 |
20080228017 | Metathesis Process For Preparing An Alpha, Omega-Functionalized Olefin - A cross-metathesis process for preparing an α,ω-functionalized olefin, such as methyl 9-decenoate, and an α-olefin having three or more carbon atoms, such as 1-decene. The process involves contacting in a first reaction zone an α-functionalized internal olefin, such as methyl oleate, and an α-olefinic monomer having three or more carbon atoms, such as 1-decene, with a first metathesis catalyst to prepare an effluent stream containing the α,ω-functionalized olefin, such as methyl 9-decenoate, an unfunctionalized internal olefin, such as 9-octadecene, unconverted reactant olefins, and optionally, an α,ω-difunctionalized internal olefinic dimer, such as dimethyl 9-octadecen-1,18-dioate; separating said effluent streams; then contacting in a second reaction zone the unfunctionalized internal olefin with ethylene in the presence of a second metathesis catalyst to obtain a second product effluent containing the α-olefinic monomer having three or more carbon atoms; and cycling a portion of the α-olefinic monomer stream(s) to the first zone. | 09-18-2008 |
20090048474 | Reactive distillation with olefin recycle - The present invention relates to a process for the production of alkene(s) from a feedstock comprising of at least one monohydric aliphatic paraffinic alcohol in a reactive distillation reactor with olefin recycle. | 02-19-2009 |
20090149684 | Oligomerization of hydrocarbons - Methods of oligomerizing hydrocarbons are disclosed. These methods include contacting olefins with an oligomerization catalyst in an oligomerization zone under oligomerization reaction conditions. | 06-11-2009 |
20090240093 | PROCESS FOR PRODUCTION OF AROMATIC COMPOUND - An aromatic compound, particularly benzene, is stably produced in the presence of a catalyst from a lower hydrocarbon having 2 or more carbon atoms, particularly from an ethane-containing gas composition such as ethane gas and natural gas. Disclosed is a process for producing an aromatic compound by reacting ethane or an ethane-containing raw gas in the presence of a catalyst. The catalyst may comprise molybdenum carried on metallosilicate such as H-type ZSM-5H or H-type MCM-22. In the reaction, the temperature is from 550 to 750° C., preferably not lower than 600° C. and not higher than 680° C. Additionally, the raw gas further contains methane and hydrogen is added thereto, thereby improving the production efficiency and stability. | 09-24-2009 |
20100048965 | Integrated Oxygenate Conversion and Product Cracking - Improved processing of an oxygenate-containing feedstock for increased production or yield of light olefins. Such processing involves oxygenate conversion to olefins and subsequent cracking of heavier olefins wherein at least a portion of the products from each of the reactors is elevated in pressure, using a common compressor, prior to being routed to a common product fractionation and recovery section. In one particular embodiment, the cracked product gas can be treated to remove acid gas therefrom. In another embodiment, the olefin cracking reactor is a moving bed reactor. | 02-25-2010 |
20100087693 | Integrated Oxygenate Conversion and Product Cracking - Improved processing of an oxygenate-containing feedstock for increased production or yield of light olefins. Such processing involves oxygenate conversion to olefins and subsequent cracking of heavier olefins wherein at least a portion of the products from each of the reactors is elevated in pressure, using a common compressor, prior to being routed to a common product fractionation and recovery section. In one particular embodiment, the cracked product gas can be treated to remove acid gas therefrom. In another embodiment, the olefin cracking reactor is a moving bed reactor. | 04-08-2010 |
20100168486 | Method for Production of Styrene from Toluene and Methanol - A process is disclosed for making styrene by converting methanol to formaldehyde in a reactor then reacting the formaldehyde with toluene to form styrene in a separate reactor. | 07-01-2010 |
20100234655 | PROCESS FOR PREPARING C2 TO C4 OLEFINS FROM A FEED STREAM COMPRISING OXYGENATES AND STEAM - In a process for the preparation of C | 09-16-2010 |
20100240937 | PROCESS FOR THE PRODUCTION OF OLEFINS - Disclosed is a process for the production of C2 to C3 olefins via the catalytic cracking of feedstocks including C4 and heavier olefins in an integrated reaction/regeneration system. | 09-23-2010 |
20100331590 | PRODUCTION OF LIGHT OLEFINS AND AROMATICS - Processes for the conversion of both straight- or branched-chain (e.g., paraffinic) as well as cyclic (e.g., naphthenic) hydrocarbons of a hydrocarbon feedstock into value added product streams are disclosed. The processes involve the use of both dehydrogenation and olefin cracking to produce both light olefins and aromatics in varying proportions depending on the feedstock composition and particular processing scheme. The processes are especially applicable to naphtha feedstocks comprising paraffins and naphthenes in the C | 12-30-2010 |
20110028771 | Aromatics Co-Production in a Methanol-to-Propylene Unit - The present invention provides a reactor system having: (1) a first reactor receiving an oxygenate component and a hydrocarbon component and capable of converting the oxygenate component into a light olefin and the hydrocarbon component into alkyl aromatic compounds; (2) a separator system for providing a first product stream containing a C | 02-03-2011 |
20110040134 | PROCESS FOR THE PRODUCTION OF BUTADIENE - Processes are provided for the production of butadiene from C | 02-17-2011 |
20110046425 | BATCH PROCESS AND SYSTEM FOR THE PRODUCTION OF OLEFINS - Disclosed herein is a process for producing an alpha olefin comprising obtaining a feed stream comprising an internal olefin having a first carbon number and an alpha olefin having a first carbon number, isomerizing the feed stream to increase the quantity of the alpha olefin, fractionating, subjecting the overhead material from fractionation to catalytic metathesis to produce a mixed olefin effluent comprising an internal olefin having a second carbon number and other hydrocarbons, fractionating, preparing the first isomerization reactor and fractionator to receive the olefin having a second carbon number, isomerizing the internal olefin intermediate in the prepared first isomerization reactor, and fractionating the second isomerization effluent in the prepared first fractionator to separate the alpha olefin having the second carbon number from the internal olefin having the second carbon number. A corresponding system also is disclosed, along with a heat pump that can be incorporated into the process. | 02-24-2011 |
20110077439 | Process for the production of low-concentration ethylene for chemical use - Process for the production of ethylene for chemical use starting with a hydrocarbon source according to which: a) the hydrocarbon source is subjected to a first cracking step, namely a pyrolysis step carried out in a cracking oven, thus producing a mixture of cracking products; b) the mixture of cracking products is subjected to a succession of treatment steps, including a compression step, which makes it possible to obtain a purified crude gas stream; c) the purified crude gas stream is then cooled to a temperature where hydrocarbons with 6 and more carbon atoms condense so that they can be removed from the purified crude gas stream; d) the resulting purified gas stream is afterwards supplied to one separating column, where a fraction A containing hydrogen, methane and ethylene is separated at the head of the column and a heavy fraction C is separated at the bottom of the column; e) a part of the reflux of this column is supplied to a refrigeration cycle leading to a fraction B enriched with ethylene; and f) the fraction A and fraction B are separately supplied to chemical use of ethylene. | 03-31-2011 |
20110137094 | PROCESS FOR PRODUCING ETHYLIDENE NORBORNENE - Process for producing ethylidenorbornene (ENB) comprising a stage of thermal cracking of DCPD to CPD carried out in an inert fluid to which it is fed a stream of DCPD comprising virgin DCPD from cracking containing up to 10% wt of tetrahydroindene (THI) and recycled DCPD containing THI coming from the subsequent stage of formation of vinylnorbornene. The contact time of DCPD with the heat transfer fluid is of few seconds and it is sufficient to achieve a conversion of said DCPD ≧95%, with little formation of oligomers. THI is then separated from the heat transfer fluid substantially free from DCPD and enriched in THI to a fractionation column. | 06-09-2011 |
20120004481 | FLEXIBLE PROCESS FOR TRANSFORMATION OF ETHANOL INTO MIDDLE DISTILLATES - The invention describes a process for the production of middle distillate hydrocarbon bases from an ethanol feedstock that is produced from a renewable source that is obtained from biomass, whereby said process comprises a stage for purification of said feedstock, a stage for transformation of said purified feedstock into a light olefinic effluent that comprises at least 30% by weight of olefins that have between four to six carbon atoms relative to the total mass of the formed hydrocarbon compounds, whereby said stage works in the presence of a catalyst that comprises at least one zeolite that is selected from among the zeolites that have a structural type that appears in the following list: CHA, ERI, MTF, AEI, AEL, FER, EUO, MEL, MFS, TON, MTT and the zeolites ZBM-30, ZSM-48, IM-5 and IZM-2, taken by themselves or in a mixture, a stage for separation of the olefinic effluent that is obtained from stage b) in such a way as to eliminate at least a portion of the water that is formed during stage b) to produce at least one hydrocarbon gaseous effluent that for the most part has three or fewer carbon atoms and at least one olefinic hydrocarbon liquid effluent that for the most part has more than four carbon atoms, and a stage for oligomerization of at least a portion of the hydrocarbon effluents that are obtained from stage c) in the presence of an amorphous or zeolitic catalyst that has at least pore openings that contain 10 or 12 oxygen atoms, producing middle distillate hydrocarbon bases. | 01-05-2012 |
20120271080 | PROCESSES FOR PRODUCING PROPYLENE FROM PARAFFINS - Embodiments of processes for producing propylene from paraffins are provided. The process comprises the steps of combining an effluent that comprises propylene and propane from a paraffin dehydrogenation reactor with an offgas stream that comprises propane to form a combined effluent stream. The combined effluent stream is separated into a propylene product stream and a propane-rich recycle stream. The propane-rich recycle stream is introduced to the paraffin dehydrogenation reactor operating at dehydrogenation conditions to convert propane in the propane-rich recycle stream to propylene. | 10-25-2012 |
20120271081 | METHOD FOR THE PRODUCTION OF C10+ HYDROCARBONS FROM HETEROATOMIC ORGANIC COMPOUNDS - The invention relates to a process for producing distillate from a charge of heteroatomic organic compounds comprising at least one heteroatom chosen from oxygen, sulfur and halogen, alone or in combination, in which the treatment of the charge comprises at least one step of conversion of the heteroatomic organic compounds into olefins performed in a first conversion zone, and, in at least a second oligomerization zone, a step of oligomerization of olefins originating at least partly from the conversion zone, in the presence of at least 0.5% by weight of oxygenated compounds, in order to produce a distillate. By virtue of the presence of oxygenated compounds during the oligomerization, this process makes it possible to improve the yield of distillate, making it possible to obtain a higher degree of oligomerization relative to the oligomerization of the same charge under the same reaction conditions. | 10-25-2012 |
20120302807 | METHANE REJECTION AND ETHYLENE RECOVERY - A process for the production of an ethylene product stream from a reactor effluent stream includes passing the reactor effluent stream and an ethylene recycle stream to a deethanizer zone to provide a light hydrocarbon feedstream and a C | 11-29-2012 |
20130165718 | PROCESS FOR THE PREPARATION OF OLEFINS - A process for the preparation of an olefin product, which process comprises the steps of: a) converting an oxygenate feedstock in an oxygenate-to-olefins conversion system, comprising a reaction zone in which an oxygenate feedstock is contacted with an oxygenate conversion catalyst under oxygenate conversion conditions, to obtain a conversion effluent comprising ethylene and/or propylene; b) separating at least a portion of the ethylene from the conversion effluent to form an ethylene stream; c) feeding the ethylene stream to an oligomerization step to produce higher molecular weight olefins; d) recycling at least a portion of the olefins as a recycle higher molecular weight olefins stream to step a). | 06-27-2013 |
20130172644 | PROCESS FOR PREPARING LOWER OLEFINS FROM AN OXYGENATE - The invention relates to a process for preparing lower olefins from an oxygenate, the process comprising: subjecting C4 hydrocarbons obtained in an oxygenate-to-olefins conversion step to extractive distillation to an etherification step to convert isobutene into an alkyl tertiary butyl ether to obtain an isobutene-depleted C4 hydrocarbon stream and alkyl tertiary-butyl ether; | 07-04-2013 |
20130172645 | PROCESS FOR PREPARING LOWER OLEFINS FROM AN OXYGENATE - The invention relates to a process for preparing lower olefins from an oxygenate, the process comprising subjecting C4 hydrocarbons obtained in an oxygenate-to-olefins conversion step to extractive distillation to obtain a stream enriched in unsaturated C4 hydrocarbons comprising isobutene and n-butenes, and a stream enriched in saturated C4 hydrocarbons; converting the isobutene in the stream enriched in unsaturated C4 hydrocarbons into an alkyl tertiary butyl ether to obtain an isobutene-depleted unsaturated C4 hydrocarbon stream and alkyl tertiary-butyl ether; and recycling at least part of the isobutene-depleted unsaturated C4 hydrocarbon stream and/or at least part of the alkyl tertiary-butyl ether, optionally after conversion into tertiary butanol and/or isobutene, to the oxygenate-to-olefins conversion step. | 07-04-2013 |
20130204057 | SIMULTANEOUS DEHYDRATION AND SKELETAL ISOMERISATION OF ISOBUTANOL ON ACID CATALYSTS - The present invention (in a first embodiment) relates to a process for the simultaneous dehydration and skeletal isomerisation of isobutanol to make substantially corresponding olefins, having the same number of carbons and consisting essentially of a mixture of n-butenes and iso-butene, said process comprising:
| 08-08-2013 |
20130281749 | PROCESS FOR CONVERTING A HEAVY FEED INTO MIDDLE DISTILLATE - The present invention describes a process for the conversion of a heavy feed which can be used to improve the selectivity for middle distillate. The process employs a catalytic cracking unit followed by one or more units for the oligomerization of C2 to C9 olefins which can preferentially produce an additional cut termed the middle distillate. The light portion of the oligomerate produced which cannot be incorporated into the middle distillate cut is recycled to the FCC unit for cracking into light olefins which are returned to the oligomerization units as a supplement to the olefins of the feed in order to preferentially form heavy oligomerates which can be incorporated into the middle distillate cut. | 10-24-2013 |
20130324773 | Methods and Apparatus for Treating a Hydrocarbon Stream - Disclosed is a method for treating two or more aromatic feed streams including combining one aromatic feed stream with another aromatic feed stream. The method further includes passing the combined feed stream to a unsaturated aliphatic compound removal zone for removing an unsaturated aliphatic compound therefrom. The method further includes passing the combined aromatic feed stream to a nitrogen removal zone for removing a nitrogen compound therefrom. | 12-05-2013 |
20130324774 | Methods and Apparatus for Treating a Hydrocarbon Stream - Disclosed is a method for removing water, nitrogen compounds, and unsaturated aliphatic compounds from a hydrocarbon feed stream by passing the hydrocarbon feed stream through a water removal zone, a nitrogen removal zone, and an unsaturated aliphatic compound removal zone. By on aspect, the method includes removing water from the hydrocarbon feed stream, contacting the feed stream with a nitrogen selective adsorbent, and contacting the feed stream with an unsaturated aliphatic compound removal material. | 12-05-2013 |
20130331625 | ALKYLATION METHOD USING IONIC LIQUID AS CATALYST - Disclosed is an alkylation process using ionic liquid as catalyst, which process comprises separating halogenated hydrocarbons-rich fraction from the alkylation product by distillation and/or adsorption and reintroducing the separated fraction into the reaction system during the alkylation reaction, wherein the ionic liquid catalyst used in the alkylation reaction has a cation derived from hydrohalide of alkyl amine, hydrohalide of imidazole or hydrohalide of pyridine and an anion derived from one or more metallic compounds. The inventive process effectively utilizes the halogenated hydrocarbons in the alkylation product, prolongs the life of the ionic liquid catalyst, and reduces the halogen content in the alkylate oil. | 12-12-2013 |
20140121429 | PROPYLENE PRODUCTION PROCESS WITH HEAVIES RECYCLE - Processes for forming propylene are described herein. The processes generally include reacting a metathesis feed stream including n-butene with ethylene in the presence of a metathesis catalyst via a metathesis reaction to form a metathesis product stream including propylene, ethylene, butene and C | 05-01-2014 |
20140135546 | PROCESS FOR MAKING PROPYLENE FROM OLIGOMERIZATION AND CRACKING - Disclosed is an oligomerate produced over a uni-dimensional 10-ring pore structured zeolite catalyst that is readily fluid catalytically cracked to propylene. | 05-15-2014 |
20140135547 | PROCESS FOR OLIGOMERIZING LIGHT OLEFINS INCLUDING PENTENES - A process provides oligomerization feed stream comprising C | 05-15-2014 |
20140171705 | PROCESS AND APPARATUS FOR RECOVERING PRODUCT - A process and apparatus are disclosed for recovering a product stream by fractionation perhaps with compression of a C | 06-19-2014 |
20140221714 | METHOD FOR PRODUCING XYLENE - A method for producing xylene from feedstock oil includes a cracking/reforming reaction step of bringing the feedstock oil into contact with a catalyst to produce monocyclic aromatic hydrocarbons; a separation/recovery step of separating and recovering, from a product obtained by the cracking/reforming reaction step, a fraction A containing monocyclic aromatic hydrocarbons having a 10 vol % distillation temperature of 75° C. or higher and a 90 vol % distillation temperature of 140° C. or lower, a xylene fraction containing xylene, and a fraction B containing monocyclic aromatic hydrocarbons having a 10 vol % distillation temperature of 145° C. or higher and a 90 vol % distillation temperature of 215° C. or lower; and a xylene conversion step of bringing a mixed fraction obtained by mixing the fractions A and B with each other into contact with a catalyst containing a solid acid to convert the mixed fraction into xylene. | 08-07-2014 |
20150080627 | Low Emissions Oxidative Dehydrogenation Process for Producing Butadiene - Butadiene is formed by dehydrogenation of butenes which are mixed with steam and oxygen then converted to butadiene by oxidative dehydrogenation over a ferritic oxide catalyst, wherein the sensible heat in the oxidative dehydrogenation reaction product is utilized along with heat produced by thermal oxidation of low value volatile products formed to reduce energy requirements and CO | 03-19-2015 |
20150141721 | OLEFIN CONVERSION PROCESS - Processes for the production of olefins are disclosed, which may include: contacting a hydrocarbon mixture comprising linear butenes with an isomerization catalyst to form an isomerization product comprising 2-butenes and 1-butenes; contacting the isomerization product with a first metathesis catalyst to form a first metathesis product comprising 2-pentene and propylene, as well as any unreacted C | 05-21-2015 |
20150141722 | OLEFIN CONVERSION PROCESS - Processes for the production of high purity alpha olefins from a mixture of olefins are disclosed. The processes may include: contacting propylene and a hydrocarbon mixture comprising a mixture of olefins having a carbon number n with a first metathesis catalyst to form a metathesis product comprising a beta-olefin having a carbon number n+1, an alpha-olefin having a carbon number n−1, as well as any unreacted propylene and olefins having a carbon number n. The metathesis product may be fractionated to recover a fraction comprising the beta-olefin having a carbon number n+1. Ethylene and the fraction comprising the beta-olefin having a carbon number n+1 may then be contacted with a second metathesis catalyst to form a second metathesis product comprising an alpha-olefin having a carbon number n and propylene, which may be fractionated to form a propylene fraction and a fraction comprising the alpha olefin having a carbon number n. | 05-21-2015 |
20150361008 | PRODUCTION OF 1,3-BUTADIENE - Olefins and diolefins, such as 1,3-butiadiene, may be produced by a method utilizing a series of bromination and dehydrobromination reactions. Bromine may be reacted with n-butane to form dibromobutane. The dibromobutanes may be dehydrobrominating to form 1,3-butadiene. The method may include reacting butene with bromine to form bromobutenes, and dehydrobrominating the bromobutenes to form 1,3-butadiene. The method may include reacting butene with hydrogen bromide in the presence of oxygen to form bromobutenes, and dehydrobrominating the bromobutenes to form 1,3-butadiene. The method may include reacting butene with bromine to form dibromobutanes, and dehydrobrominating the dibromobutanes to form 1,3-butadiene. | 12-17-2015 |
20150376082 | PROCESS FOR CONVERSION OF PROPANE AND APPARATUS - A process and apparatus are presented for the conversion of propane to higher valued fuels, such as gasoline and diesel. The process includes the dehydrogenation of propane to generate a propylene stream. The propylene stream is oligomerized and controlled to generate a liquid hydrocarbon stream in the C6 to C12 range. | 12-31-2015 |
20160122256 | METHOD FOR PRODUCING AN AROMATIC HYDROCARBON WITH AN OXYGENATE AS RAW MATERIAL - A method for producing an aromatic hydrocarbon with an oxygenate as raw material, includes: i) reacting an oxygenate in at least one aromatization reactor to obtain an aromatization reaction product; ii) separating the aromatization reaction product to obtain a gas phase hydrocarbons flow X and a liquid phase hydrocarbons flow Y; iii) after removing gas and/or a part of the oxygenate from the gas phase hydrocarbons flow X, a hydrocarbons flow X | 05-05-2016 |
20160137944 | SYNTHESIS OF BASE OILS AND FUELS FROM FATTY ACIDS - Processes and systems for producing base oils and fuels from fatty acids comprising, in an embodiment, oligomerizing at least one unsaturated fatty acid to provide a mixture of fatty acid oligomers, wherein the mixture of fatty acid oligomers comprises fatty acid trimers and heavier molecules; and hydrotreating the mixture of fatty acid oligomers to provide a product comprising hydrotreated fatty acid oligomers including hydrotreated trimers and heavier molecules, wherein the product has a pour point and other characteristics suitable for use as a base oil, and wherein such processes for base oil production do not require an isomerization step. | 05-19-2016 |
20180022673 | PROCESS FOR CONVERTING METHANOL TO HYDROCARBONS SUITABLE FOR USE AS GASOLINE OR BLENDSTOCK | 01-25-2018 |
20190144361 | METHOD OF PREPARING BUTADIENE | 05-16-2019 |
585316000 | Earlier synthesis is condensation or alkyl transfer | 7 |
20090043142 | PROCESS FOR THE DEHYDROGENATION OF ALKYL-AROMATIC HYDROCARBONS FOR THE PRODUCTION OF VINYL-AROMATIC MONOMERS - Process for the production of vinyl-aromatic monomers which comprises: a) feeding an aromatic stream and an olefinic stream to alkylation; b) feeding the reaction product coming from the alkylation section to a first separation section; c) recovering the mono-alkylated aromatic hydrocarbon from the first separation section; d) feeding the mono-alkylated aromatic product to a dehydrogenation section; e) cooling and condensing the reaction gases in the shell of one or more heat exchangers; f) feeding the reaction product coming from the dehydrogenation section to a second separation section; g) recovering the stream of vinyl-aromatic monomer. | 02-12-2009 |
20090292150 | Integrated Processes for Making Detergent Range Alkylbenzenes from C5-C6-Containing Feeds - Integrated processes for making detergent range alkylbenzenes from C | 11-26-2009 |
20100160699 | METHOD FOR EFFICIENT USE OF HYDROGEN IN AROMATICS PRODUCTION FROM HEAVY AROMATICS - A method for efficient use of hydrogen in aromatics production from heavy aromatic oil. A hydrocarbonaceous stream comprising C | 06-24-2010 |
20110224468 | Process for Producing Alkylaromatic Compounds - In a process for alkylation of an alkylatable aromatic compound to produce a monoalkylated aromatic compound, a first feed stream comprising fresh alkylatable aromatic compound is passed to a first reaction zone which comprises a transalkylation catalyst and which also receives a second feed stream comprising polyalkylated aromatic compounds. The first and second feed streams are contacted with the transalkylation catalyst in the first reaction zone under conditions to transalkylate the polyalkylated aromatic compounds with the alkylatable aromatic compound to produce the desired monoalkylated aromatic compound. A first effluent stream comprising unreacted alkylatable aromatic compound and the monoalkylated aromatic compound is removed from the first reaction zone and passed to a fractionation system to separate the first effluent stream into a first light fraction comprising the unreacted alkylatable aromatic compound and a first heavy fraction comprising the monoalkylated aromatic compound. At least part of one or more impurities in the fresh feed stream are removed in the first reaction zone. | 09-15-2011 |
20130237731 | PROCESSES FOR PREPARING ALKYLATED AROMATIC COMPOUNDS - Processes for preparing alkylation aromatic compounds are provided. One process for preparing alkylated aromatic compounds includes reacting an aromatic compound and an olefin in at least one primary alkylation reaction in the presence of a first alkylation catalyst to produce a first effluent. The first effluent is split into a first product-rich stream and a first recycle stream, and the first recycle stream is recycled to the at least one primary alkylation reaction. Unreacted aromatic compound from the first product-rich stream and an additional olefin are reacted in at least one downstream alkylation reaction in the presence of a second alkylation catalyst to produce a second effluent. The second effluent is split into a second product-rich stream and a second recycle stream, and the second recycle stream is recycled to the at least one primary alkylation reaction and, optionally, to the at least one downstream alkylation reaction. | 09-12-2013 |
20150148574 | PROCESS FOR THE PREPARATION OF AN OLEFIN PRODUCT - A process for the preparation of an olefin product, which process comprises the steps of: a) converting an oxygenate feedstock in an oxygenate-to-olefins conversion system, comprising a reaction zone in which an oxygenate feedstock is contacted with an oxygenate conversion catalyst under oxygenate conversion conditions, to obtain a conversion effluent comprising olefins and paraffins; b) separating at least a portion of the paraffins from the conversion effluent to form a paraffin stream; and c) recycling at least a portion of the paraffin stream to step a). | 05-28-2015 |
20150321973 | PRODUCTION OF STYRENE - In a process for producing styrene, benzene is alkylated with ethylene to produce ethylbenzene and at least some of the ethylbenzene is dehydrogenated to produce styrene, together with benzene and toluene as by-products. At least part of the benzene by-product is passed through a bed of an adsorbent comprising at least one of an acidic clay, alumina, an acidic ion exchange resin and an acidic molecular sieve to remove basic nitrogenous impurities therefrom and produce a purified benzene by-product, which is then recycled to the alkylation step. | 11-12-2015 |