| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 585809000 | To recover unsaturate | 36 |
| 20090149687 | Propylene recovery during regeneration of an oxygenate removal unit - Processes and systems are disclosed that relate to the removal of impurities and separation the light olefins from an MTO product vapor stream. Specifically, the processes and systems relate to recovery of light olefins during regeneration of an adsorber in an oxygenate removal unit. Processes and systems for recovering light olefins during regeneration of an adsorber in an oxygenate removal unit can include recycling residual effluent stream to an upstream operation unit upstream of the oxygenate removal unit. Processes and systems for recovering light olefins during regeneration of an adsorber in an oxygenate removal unit can also include recycling residual effluent gas produced by depressurizing residual effluent in the first adsorber, as well as preferably venting an effluent gas from the first adsorber to a compressor upstream of the oxygenate removal unit. | 06-11-2009 |
| 20090326307 | SEPARATION PROCESS FOR OLEFIN PRODUCTION - Improved processes for the separation of olefins from paraffins, such as propylene from propane are provided. Two product splitters are used in parallel to separate propylene from propane. One of the product splitters operates at a lower pressure, while the second product splitter operates at a higher pressure. The use of the two splitters in parallel provides a process for recovery of a high purity propylene product with lower energy consumption compared to prior art processes. | 12-31-2009 |
| 20100048971 | SEPARATION OF OLEFINS FROM OLEFINS/PARAFFINS MIXED GAS - The present invention relates to a method and an apparatus for the separation of C4 olefins (butene-1, trans-2-butene, cis-2-butene, etc.) and C4 paraffins (normal butane, isobutane, etc.) from a C4 hydrocarbon mixed gas including butene-1, trans-2-butene, cis-2-butene, normal butane, isobutane, etc. The method of the present invention produces C4 olefins with high purity by introducing a gaseous C4 mixture into the adsorption tower loaded with adsorbent selectively adsorbing olefins to adsorb C4 olefins and to discharge C4 paraffins to the outlet of the tower, desorbing C4 olefins adsorbed on the adsorption tower with a desorbent (C5 hydrocarbon, C6 hydrocarbon, etc.), and then separating the C4 olefin and the desorbent by a distillation process. The apparatus of the present invention is composed of several adsorption towers loaded with an adsorbent which selectively adsorb olefins and two distillation towers for the separation of the mixture gases of olefins/desorbents and paraffins/desorbents respectively, The basic operating process of the adsorption tower comprises a adsorption step of selectively adsorbing C4 olefin from the feeding mixture, a C4 olefin rinse step of removing a small amount of C4 paraffins adsorbed together with C4 olefins, and a desorption step of desorbing C4 olefins by using a desorbent, and further comprises a pressure equalization step, a cocurrent depressurization step, and a accumulation pressure step in order to increase the yield and concentration of olefins depending on the operation pressure of the adsorption tower. The desorbent discharged from the process together with olefins or paraffins is separated in the distillation tower and then recycled. | 02-25-2010 |
| 20100197988 | METHOD FOR SEPARATING AND PRODUCING CYCLOHEXENE - There is provided a method for separating cyclohexene comprising the steps of: (a) separating a mixed solution containing cyclohexene, cyclohexane, and benzene by distillation using N,N-dimethylacetamide as an extractant; and (b) feeding at least a portion of a first bottom liquid obtained by separating cyclohexene, cyclohexane, and benzene from the mixed solution in the step (a) to an extractant purification column, withdrawing an azeotrope of cyclohexyl acetate and N,N-dimethylacetamide from a top of the extractant purification column to an outside of a system, and recycling a second bottom liquid of the extractant purification column to the step (a). | 08-05-2010 |
| 20120172649 | PROCESS FOR RECOVERY OF PROPYLENE AND LPG FROM FCC FUEL GAS USING STRIPPED MAIN COLUMN OVERHEAD DISTILLATE AS ABSORBER OIL - A process is disclosed for enhanced recovery of propylene and LPG from the fuel gas produced in Fluid catalytic cracking unit by contacting a heavier hydrocarbon feed with FCC catalyst. In the conventional process, the product mixture from FCC main column overhead comprising naphtha, LPG and fuel gas, are first condensed and gravity separated to produce unstabilized naphtha, which is subsequently used in the absorber to absorb propylene and LPG from fuel gas. However, the recovery of propylene beyond 97 wt % is difficult in this process since unstabilized naphtha already contains propylene of 5 mol % or above. In the present invention, C | 07-05-2012 |
| 20130030235 | METHOD FOR DESULFURIZING OLEFIN-CONTAINING CHARGE MATERIAL BY CONTROLLING THE OLEFIN CONTENT - A process and an apparatus for desulphurisation of a feed stream containing olefins and hydrogen which is split into at least two feed streams. The first feed stream is introduced into the reactor and reaches a first catalyst bed and is heated by the hydrogenation reaction. Downstream the second feed stream is supplied which will cool down the reaction gas which can then be passed through a second catalyst bed. The content the feed streams can be controlled by adding olefins or dilution gas. The reaction will generate a product gas which will basically contain hydrogen sulphide as a sulphur compound. The temperature of the catalysts and of the gas flow is controlled via the olefin content in the feed streams. The higher the olefin content in the feed stream, the more intense the heating of the gas flow by the hydrogenation heat in the subsequent catalyst bed. | 01-31-2013 |
| 20130102827 | METHOD FOR TREATING A CRACKED GAS STREAM FROM A HYDROCARBON PYROLYSIS INSTALLATION AND INSTALLATION ASSOCIATED THEREWITH - This method includes the separation of an upstream partly condensed cracked gas stream in an intermediate separator ( | 04-25-2013 |
| 20130102828 | Process to Decrease or Eliminate Corrosion from the Decomposition of Halide Containing Olefin Cataysts - A process is provided to inhibit or limit the decomposition of a halide-containing olefin oligomerization catalyst system during recovery of an oligomerization product. The process includes deactivation of an olefin oligomerization catalyst system present in an olefin oligomerization reactor effluent stream by contact with an alcohol under conditions that minimize potential for deactivated catalyst system decomposition. Such conditions include minimization of the water content of the deactivation agent and concentration of the deactivation agent. | 04-25-2013 |
| 20130172653 | "PROCESS FOR REMOVING OXYGENATED CONTAMINANTS FROM AN HYDROCARBONSTREAM" - The present invention is a process for removing oxygenated contaminants and water from an hydrocarbon stream comprising:
| 07-04-2013 |
| 20130172654 | PROCESS FOR REMOVING OXYGENATED CONTAMINANTS FROM AN HYDROCARBON STREAM - The present invention is a process for removing oxygenated contaminants and water from an hydrocarbon stream comprising:
| 07-04-2013 |
| 20130172655 | PROCESS FOR REMOVING OXYGENATED CONTAMINANTS FROM AN HYDROCARBON STREAM - The present invention is a process for removing oxygenated contaminants and water from an hydrocarbon stream comprising:
| 07-04-2013 |
| 20130178683 | PROCESS FOR REMOVING OXYGENATED CONTAMINANTS FROM AN HYDROCARBONSTREAM - The present invention is a process for removing oxygenated contaminants and water from an hydrocarbon stream comprising:
| 07-11-2013 |
| 20130237740 | Use of Solvent to Decrease Caustic Scrubber Fouling - The present invention is a method of reducing the formation of fouling deposits occurring in a caustic scrubber used to remove acid gases comprising:
| 09-12-2013 |
| 20130267752 | METHOD FOR PURIFICATION OF A HYDROCARBON STREAM CONTAINING OLEFIN AND AMINE - The present invention relates to a method for purification of a hydrocarbon stream containing linear alpha olefins, isomers thereof and at least one organic amine, the linear alpha olefins, isomers and the amine having boiling points under atmospheric pressure which differ by at most 5° C., comprising the step of removing a major amount of the organic amine from the hydrocarbon stream by distillation, wherein the distillation is carried out to that, together with the amine, between 5% and 95 wt % of the isomers, based on the total amount of the isomers in the hydrocarbon stream, are removed from the hydrocarbon stream in an amine/isomer-rich fraction. | 10-10-2013 |
| 20140012059 | PROCESS FOR SEPARATING 1-HEXENE FROM A MIXTURE OF PRODUCTS OBTAINED FROM AN ETHYLENE TRIMERIZATION ZONE - A process for recovering 1-hexene comprising: a) separating the mixture obtained from the ethylene trimerization reaction into a top fraction comprising ethylene and a bottom fraction, b) separating a portion of the bottom fraction obtained from step a) into a top fraction comprising 1-hexene and 1-butene and a bottom fraction, c) separating a portion of the fraction comprising 1-hexene and 1-butene obtained from step b) into a top fraction principally comprising 1-butene and into a bottom fraction principally comprising 1-hexene, and in said process: a portion of the bottom fraction obtained from step b) is returned to the reaction section and another portion of said bottom fraction obtained from step b) is used in a recirculation loop connecting the reaction section and the column of said step b), said recirculation loop being used to cool the reaction section and to reboil said column of step b). | 01-09-2014 |
| 20140135558 | RECOVERY OF ETHYLENE FROM METHANOL TO OLEFINS PROCESS - Olefins may be recovered from a methanol to olefins reactor effluent by initially feeding the effluent to an absorber demethanizer to contact the effluent with an absorbent to recover an overheads including methane and ethylene and a bottoms including the absorbent, ethylene, and ethane. The bottoms are separated to recover an ethylene fraction and an ethane fraction. The overheads are cooled and partially condensed in a first heat exchanger to a temperature of −40° C. or greater. The resulting stream, or a portion thereof, may be further cooled and condensed via indirect heat exchange with a mixed refrigerant to a temperature of less than −40° C. The non-condensed vapors are separated from the condensed liquids to form a liquid fraction and a methane fraction. The liquid fraction is fed to the absorber demethanizer as reflux, and the methane and ethane fractions combined to form the mixed refrigerant. | 05-15-2014 |
| 20140235915 | PROCESS FOR SULFUR REMOVAL FROM REFINERY OFF GAS - Organic sulfur compounds contained in refinery off gas streams having either high ort low concentrations of olefins are converted to hydrogen sulfides which can be then be removed using conventional amine treating systems. The process uses a catalytic reactor with or without a hydrotreater depending on the olefin concentration of the off gas stream. The catalytic reactor operates in a hydrogenation mode or an oxidation mode to convert a majority of organic sulfur compounds into hydrogen sulfides. | 08-21-2014 |
| 20140303422 | Process for Removing Oxygenated Contaminates from an Ethylene Stream - The present invention is, in a first embodiment, a process for removing oxygenated contaminants from an ethylene stream comprising: | 10-09-2014 |
| 20140323791 | Process for Removing Oxygenated Contaminates from an Ethylene Stream - The present invention is a process for removing oxygenated contaminants from an ethylene stream comprising:
| 10-30-2014 |
| 20140336434 | METHOD FOR REMOVAL OF ORGANIC AMINES FROM HYDROCARBON STREAMS - The present invention relates to a method for removal of an organic amine from a liquid hydrocarbon stream containing the amine, comprising: a) adding water to the hydrocarbon stream containing the amine, b) bubbling carbon dioxide through the hydrocarbon stream containing the amine, and c) separating a solid phase formed containing the amine from a liquid phase. | 11-13-2014 |
| 20140350319 | PROCESS FOR REMOVING OXYGENATED CONTAMINANTS FROM AN HYDROCARBONSTREAM - The present invention is a process for removing oxygenated contaminants and water from an hydrocarbon stream comprising: | 11-27-2014 |
| 20150025292 | SEPARATION SEQUENCE FOR HYDROCARBONS FROM A GENTLE THERMAL CLEAVAGE - The invention describes a method for separating hydrocarbons in an installation for generating hydrocarbons from a hydrocarbon-containing charge by cleavage. The product gas of the cleavage, which contains gaseous hydrocarbons, is compressed, dried, and supplied as charge material into a separation stage (a front end C3/C4 separation). The front end C3/C4 separation comprises a C4 absorber and a depropanizer. A hydrocarbon fraction consisting of hydrocarbons having a maximum of 3 carbon atoms is obtained as a gaseous overhead product of the C4 absorber. A liquid hydrocarbon fraction consisting of hydrocarbons having at least 4 carbon atoms is obtained as a bottom product of the depropanizer. The front end C3/C4 separation comprises an additional process technological C2/C4 separation stage is arranged between the C4 absorber and the depropanizer. | 01-22-2015 |
| 20150368168 | OPTIONS TO REDUCE FOULING IN MTO DOWNSTREAM RECOVERY - A process is presented for removing the fouling problems associated with the product recovery in a methanol to olefins conversion process. The process includes passing the quenched MTO process stream to a product separator, wherein an intermediate stream is generated and includes water and heavier hydrocarbons. The intermediate stream is processed to remove the buildup of heavier hydrocarbons. | 12-24-2015 |
| 20160075619 | Process for Recovering Olefins from Manufacturing Operations - A process for treating an effluent gas stream arising from a manufacturing operation that produces an olefin or an olefin derivative. The process involves compressing the feed gas stream, which comprises an olefin, a paraffin, and a third gas, to produce a compressed stream, then cooling and condensing the compressed stream. The condensation step produces a liquid condensate and an uncondensed gas stream. The liquid condensate is then passed through a membrane separation step. The membrane separation of the condensate results in an olefin-enriched stream, which may be recycled for use within the manufacturing operation, and an olefin-depleted stream, which may be purged from the process. | 03-17-2016 |
| 20160075620 | Process for Recovering Olefins from Manufacturing Operations - A process for treating an effluent gas stream arising from a manufacturing operation that produces an olefin or a non-polymeric olefin derivative. The process involves cooling and condensing the effluent gas stream, which comprises an olefin, a paraffin, and a third gas, to produce a liquid condensate and an uncondensed (residual) gas stream. Both streams are then passed through membrane separation steps. The membrane separation of the uncondensed gas stream results in an olefin-enriched stream and an olefin-depleted stream. The olefin-enriched stream is recirculated within the process prior to the condensation step. The membrane separation of the condensate also results in an olefin-enriched stream, which may be recycled for use within the manufacturing operation, and an olefin-depleted stream, which may be purged from the process. | 03-17-2016 |
| 20190144363 | PROCESS AND PLANT FOR OBTAINING AN ETHYLENE PRODUCT IN A SUPERCRITICAL STATE | 05-16-2019 |
| 585810000 | Diolefin | 10 |
| 20090306450 | Extractive distillation - A method for reducing corrosion in a diolefin extractive distillation process comprising preventing the formation of ammonium carbonate by promoting the formation of a carbonate salt that does not dissociate in the ammonium carbonate dissociation temperature range of that extractive distillation process. | 12-10-2009 |
| 20100298621 | Fractional extraction of butadiene - A method for the solvent extraction of 1,3-butadiene from a mixture of C | 11-25-2010 |
| 20120226087 | PROCESS FOR WORKUP OF A STREAM COMPRISING BUTENE AND/OR BUTADIENE - The invention relates to a process for workup of a stream ( | 09-06-2012 |
| 20130178684 | PROCESS FOR PROVIDING A VAPOROUS PURIFIED CRUDE C4 CUT AS A FEED STREAM FOR AN EXTRACTIVE DISTILLATION WITH A SELECTIVE SOLVENT - Mixtures of hydrocarbons predominantly having 4 carbon atoms per molecule known as C | 07-11-2013 |
| 20130197292 | PROCESS FOR PURIFYING A RECYCLE STREAM FROM A 1,3-BUTADIENE PROCESSING PLANT - Secondary streams in 1,3-butadiene processing plants still contain high amounts of valuable 1,3-butadiene. An energy-efficient process for purifying a recycle stream from a 1,3-butadiene processing plant is provided. The recycle stream is divided into two substreams: the first substream for prepurifying pure 1,3-butadiene feedstream by removing high boilers relative to 1,3-butadiene in a stripping column and the second substream in an extractive distillation plant. | 08-01-2013 |
| 20140081066 | BUTADIENE EXTRACTION PRE-ABSORBER - A process for recovering butadiene from a C | 03-20-2014 |
| 20140100405 | FLEXIBLE BUTADIENE EXTRACTION PROCESS - A butadiene extraction processes designed for flexible operations, with or without a compressor, is disclosed. The ability to run at both high and low pressures provides added process flexibility. | 04-10-2014 |
| 20140121437 | BUTADIENE EXTRACTION PROCESS - A process for recovering 1,3-butadiene from a C | 05-01-2014 |
| 20140187839 | PURIFICATION OF ISOPRENE FROM RENEWABLE RESOURCES - Methods and apparatus for the purification of isoprene, such as the purification of a bioisoprene composition from fermentor off-gas. The apparatus includes two columns that process the fermentor off-gas, which includes isoprene and various impurities. A solvent is added to the off-gas in the first column, and the isoprene is stripped from the solvent in the second column. Also provided is a downstream further purification process. Also provided are the resulting purified isoprene compositions. | 07-03-2014 |
| 20160122265 | CO-EXTRACTION SYSTEMS FOR SEPARATION AND PURIFICATION OF BUTADIENE AND ISOPRENE - Co-extraction techniques for separating and purifying butadiene and isoprene from a C | 05-05-2016 |
