| Entries |
| Document | Title | Date |
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| 20090062556 | CARRIER FOR OLEFIN OXIDE CATALYST - A carrier for a catalyst useful for the epoxidation of an olefin which comprises an inert, refractory solid carrier is provided. The carrier has no or little absolute volume from small pores, of less than 1 micrometer, and large pores, of above 5 micrometer. By “no or little absolute volume from small pores of less than 1 micron” it is meant that the pore volume of such pores is less than 0.20 ml/g. By “no or little absolute volume from large pores of above 5 micron” it is meant that the pore volume of such pores is less than 0.20 ml/g. The invention further provides a catalyst useful for the epoxidation of an olefin supported on such a carrier and a process for the oxidation of an olefin, especially ethylene, to an olefin oxide, especially ethylene oxide. | 03-05-2009 |
| 20090082584 | PROCESS FOR INITIATING A HIGHLY SELECTIVE ETHYLENE OXIDE CATALYST - A process for initiating a highly selective ethylene oxide catalyst is provided in which the highly selective ethylene oxide catalyst is operated first as a ‘standard’ Ag-based catalyst (e.g., a catalyst that contains only silver and alkali metal, especially cesium). Moreover, the inventive initiation procedure is more efficient when the concentration of carbon dioxide in the feed is higher than 6 vol. %, and even more efficient when the concentration of carbon dioxide in the feed is higher than 10 vol. %, of the feed mixture during the initiation period. | 03-26-2009 |
| 20090131695 | Catalyst, a process for preparing the catalyst and a process for the production of an olefin oxide, a 1,2-diol, a 1,2 diol ether, or an alkanolamine - A catalyst which comprises a carrier and silver deposited on the carrier, which carrier has a surface area of at least 1.3 m | 05-21-2009 |
| 20090177000 | ALKYLENE OXIDE CATALYST AND USE THEREOF - A supported silver catalyst and use thereof in a process for producing an alkylene oxide, such as ethylene oxide, by the direct oxidation of an alkylene with oxygen or an oxygen-containing gas, wherein the catalyst provides improved stability and improved resilience to reactor upsets and timely recovery to substantially pre-upset levels of catalyst activity and/or efficiency. In some embodiments, the catalyst also exhibits improved activity. A catalyst capable of producing ethylene oxide at a selectivity of at least 87 percent while achieving a work rate of at least 184 kg/h/m3 at a temperature of no greater than 235° C. when operated in a process where the inlet feed to a reactor containing the catalyst comprises ethylene, oxygen, and carbon dioxide, wherein the concentration of carbon dioxide in the inlet feed is greater than or equal to 2 mole percent. | 07-09-2009 |
| 20090216034 | PROCESS FOR PRODUCING OLEFIN OXIDE - There is disclosed a process for producing an olefin oxide characterized by contacting an olefin and oxygen, in the presence of water and a halogen compound, with a silver catalyst, wherein the silver catalyst is a silver catalyst that is obtainable by contacting metal silver, a silver compound or a mixture of both with an alkaline earth metal carbonate and that has an alkali metal content of 1,500 ppm or less based on the total weight of the silver catalyst | 08-27-2009 |
| 20090234144 | Reactor System and Process for the Manufacture of Ethylene Oxide - A reactor system for the epoxidation of ethylene, which reactor system comprises an elongated tube having an internal tube diameter of more than 40 mm, wherein contained is a catalyst bed of catalyst particles comprising silver and a promoter component deposited on a carrier, which promoter component comprises an element selected from rhenium, tungsten, molybdenum and chromium; a process for the epoxidation of ethylene comprising reacting ethylene with oxygen in the presence of the catalyst bed contained in the reactor system; and a method of preparing ethylene glycol, an ethylene glycol ether or an ethanol amine comprising obtaining ethylene oxide by the process for the epoxidation of ethylene, and converting the ethylene oxide into ethylene glycol, the ethylene glycol ether, or the ethanol amine. Preferably, the internal tube diameter is at least 45 mm. | 09-17-2009 |
| 20090234145 | METHOD AND CATALYSTS FOR THE EPOXIDATION OF OLEFINIC COMPOUNDS IN THE PRESENCE OF OXYGEN - The invention relates to a method for the epoxidation of an olefinic compound, which is characterised in that it comprises an oxidation reaction of at least one olefinic compound containing one or more double bonds C═C with oxygen in the presence of one or more reaction initiating agents, at least one catalyst containing at least one metal that is selected from a noble metal, a transition metal and mixtures of same, and at least one hydrocarbon that is selected from one or more branched alkanes, one or more alkyl cyclic or cyclic hydrocarbons, one or more alkyl aromatic or aromatic compounds and mixtures of same. | 09-17-2009 |
| 20090259059 | Catalyst for producing alkylene oxide, method for producing the same, and method for producing alkylene oxide using said catalyst - A catalyst for producing alkylene oxide including fine metal silver particles dispersed and supported on a carrier, wherein not less than 90% of the fine metal silver particles have silver particle diameters of 2 to 100 nm, is disclosed. The catalyst can be produced by impregnating a carrier with a liquid containing a silver compound or a silver ion; drying the carrier; and then irradiating the carrier with microwave to form fine metal silver particles in dispersed state on the carrier. This catalyst is used for producing olefin oxide by contact gas-phase oxidation of olefin by a molecular-oxygen-containing gas. | 10-15-2009 |
| 20100048926 | CATALYST SYSTEM AND PROCESS FOR THE PRODUCTION OF EPOXIDES - The present invention relates to a catalyst system which is a mixture of at least two catalytic species, the first catalytic species being a dehydrogenation catalyst and the second catalytic species being an epoxidation catalyst and comprising silver. The present invention also relates to a process for the production of epoxides, in particular a process for the production of an epoxide from an alkane or a mixture comprising an alkane and an alkene, which process comprises contacting said alkane or mixture comprising said alkane and said alkene and a source of oxygen with such a catalyst system comprising a mixture of at least two catalytic species, the first catalytic species providing dehydrogenation activity and the second catalytic species providing epoxidation activity and comprising silver. | 02-25-2010 |
| 20100056816 | SHAPED POROUS BODIES OF ALPHA-ALUMINA AND METHODS FOR THE PREPARATION THEREOF - This invention relates to shaped porous bodies of alpha-alumina platelets which are useful as catalyst carriers, filters, membrane reactors, and preformed bodies for composites. This invention also relates to processes of making such shaped bodies and processes for modifying the surface composition of alpha-alumina. | 03-04-2010 |
| 20100179336 | CARRIER FOR OLEFIN OXIDE CATALYST - A carrier for a catalyst useful for the epoxidation of an olefin which comprises an inert, refractory solid carrier is provided. The carrier has no or little absolute volume from small pores, of less than 1 micrometer, and large pores, of above 5 micrometer. By “no or little absolute volume from small pores of less than 1 micron” it is meant that the pore volume of such pores is less than 0.20 ml/g. By “no or little absolute volume from large pores of above 5 micron” it is meant that the pore volume of such pores is less than 0.20 ml/g. The invention further provides a catalyst useful for the epoxidation of an olefin supported on such a carrier and a process for the oxidation of an olefin, especially ethylene, to an olefin oxide, especially ethylene oxide. | 07-15-2010 |
| 20100267974 | SIMPLIFIED METHOD FOR PRODUCING ALKYLENE OXIDES WITH A HIGH EFFICIENCY CATALYST AS IT AGES - A simplified method of operating an alkylene oxide production process that utilizes a high efficiency silver catalyst is shown and described. The method accounts for declining catalyst activity that occurs as the catalyst ages by making alternating changes to the reaction temperature and an overall chloriding effectiveness parameter. | 10-21-2010 |
| 20110060149 | PROCESS FOR PREPARING ETHYLENE OXIDE - Process for preparing ethylene oxide by catalytic gas phase oxidation of ethylene with oxygen, in which the reaction is performed in 5 to 50 reaction zones connected in series under adiabatic conditions, and reactor system for carrying out the process. | 03-10-2011 |
| 20110160470 | METHOD OF CONTROLLING THE PRODUCTION OF SILVER CHLORIDE ON A SILVER CATALYST IN THE PRODUCTION OF ALKYLENE OXIDES - A plant and process for producing alkylene oxides to control the production of silver chloride on a high efficiency silver catalyst is disclosed and described. The process involves reacting an alkylene and an organic chloride gas phase promoter with oxygen over the high efficiency silver catalyst. The sulfur concentration in the alkylene oxide reactor feed is controlled to reduce the production of silver chloride which acts as a catalyst poison. | 06-30-2011 |
| 20110218349 | Method for Producing Alkylene Oxide Addition Products - The invention relates to a method for producing alkylene oxide addition products. The method according to the invention is characterized by (a) contacting ethylene and/or propylene with an oxidizing agent in a first structured reactor (“μ reactor”) and (b) feeding the ethylene oxide and/or propylene oxide so obtained, optionally after purification, to a second structured reactor where it is reacted with a compound having a nucleophilic molecular group. | 09-08-2011 |
| 20110245518 | CATALYST FOR PRODUCTION OF ETHYLENE OXIDE AND METHOD FOR PRODUCTION OF ETHYLENE OXIDE - A catalyst for the production of ethylene oxide in high efficiency and high selectivity, as well as stably for a long period of time is provided. | 10-06-2011 |
| 20110301367 | METHOD FOR PREPARING AN EPOXIDATION CATALYST - A process for the preparation of a catalyst useful for the vapor phase production of ethylene oxide from ethylene and oxygen comprising the steps of providing a catalyst precursor comprising an inert support having a catalytically effective amount of a silver containing compound, a promoting amount of an alkali metal containing compound, and a promoting amount of a transition metal containing compound disposed thereon; and heating the catalyst precursor in a gas atmosphere for a first period of time and a second period of time, wherein for the first period of time the gas atmosphere is an inert gas atmosphere and the temperature range is from about 25° C. to about 600° C., and then in a second period of time the gas atmosphere is an oxygen-containing atmosphere and the second period temperature range is from about 350° C. to about 600° C. | 12-08-2011 |
| 20120022277 | CATALYST FOR ETHYLENE OXIDE PRODUCTION AND METHOD FOR PRODUCING ETHYLENE OXIDE - PROBLEM There is provided a catalyst for producing ethylene oxide which is superior in catalytic selectivity and catalytic life (durability). | 01-26-2012 |
| 20120108831 | SUPPORTED NOBLE METAL COMPRISING CATALYST FOR OXIDATIVE DEHYDROGENATION OR EPOXIDATION - Supported noble metal-comprising catalysts which can be obtained by
| 05-03-2012 |
| 20120136166 | PROCESS FOR THE PRODUCTION OF AN OLEFIN OXIDE - The invention provides a process for the epoxidation of an olefin, which process comprises reacting a feed comprising an olefin and oxygen in the presence of a catalyst comprising a carrier and silver deposited on the carrier, which carrier comprises at least 85 weight percent α-alumina and has a surface area of at least 1.3 m | 05-31-2012 |
| 20120226057 | OLEFIN EPOXIDATION PROCESS, A CATALYST FOR USE IN THE PROCESS, A CARRIER FOR USE IN PREPARING THE CATALYST, AND A PROCESS FOR PREPARING THE CARRIER - A process is provided for preparing a carrier which process comprises incorporating into the carrier at any stage of the carrier preparation a strength-enhancing additive. Also provided is the resultant carrier having incorporated therein a strength-enhancing additive and a catalyst comprising the carrier. Also provided is a process for the epoxidation of an olefin employing the catalyst. Also provided is a method of using the olefin oxide so produced for making a 1,2-diol, a 1,2-diol ether or an alkanolamine. | 09-06-2012 |
| 20120264951 | PROCESS FOR PRODUCING A CATALYST FOR THE OXIDATION OF ETHYLENE TO ETHYLENE OXIDE - The invention relates to a process for producing a catalyst for the oxidation of ethylene to ethylene oxide, which comprises a) providing a support which comprises alumina and has been impregnated with silver or with a silver-comprising compound and has a temperature T | 10-18-2012 |
| 20120264952 | CATALYST FOR PREPARING ETHYLENE OXIDE - Catalyst for preparing ethylene oxide, at least comprising silver applied to a support, the support having a BET constant C in the range from 0 to 800, determined in accordance with DIN ISO 9277. | 10-18-2012 |
| 20120264953 | ZINC-COMPRISING CATALYST FOR PREPARING ETHYLENE OXIDE - Process for preparing a catalyst for preparing ethylene oxide, which comprises silver and zinc applied to a support, where the process comprises at least
| 10-18-2012 |
| 20120277445 | METHOD FOR PRODUCING PROPYLENE OXIDE - The present invention relates to a method for producing propylene oxide, comprising a step of bringing propylene, oxygen and a silver catalyst into contact with each other in the presence of water, wherein the silver catalyst is a catalyst prepared from (a) metallic silver, a silver compound or a mixture thereof, (b) phosphorus, a phosphorus-containing compound or a mixture thereof and (c) a carrier. | 11-01-2012 |
| 20120277446 | METHOD FOR PRODUCING PROPYLENE OXIDE - The present invention relates to a method of producing propylene oxide, comprising a step of reacting propylene and oxygen in the presence of a silver catalyst and water, wherein the silver catalyst is a catalyst prepared from (a) metallic silver, a silver compound or a mixture thereof, (b) a tellurium compound and (c) a carrier. | 11-01-2012 |
| 20130006002 | PROCESS FOR PREPARATION OF A CATALYST CARRIER - This invention relates to catalyst carriers to be used as supports for metal and metal oxide catalyst components of use in a variety of chemical reactions. More specifically, the invention provides a process of formulating a low surface area alpha alumina carrier that is suitable as a support for silver and the use of such catalyst in chemical reactions, especially the epoxidation of ethylene to ethylene oxide. A precursor for a catalyst support comprises an admixture of an alpha alumina and/or a transition alumina; a binder; and either a solid blowing agent which expands, or propels a gas upon the application of sufficient heat, and optionally contains talc and/or water soluble titanium compound. | 01-03-2013 |
| 20130109871 | PROCESS FOR PRODUCING A SUPPORTED SILVER CATALYST | 05-02-2013 |
| 20130245296 | METHOD OF REDUCING THE VALUE OF AN ALKYLENE OXIDE PRODUCTION PARAMETER IN A PROCESS OF MAKING AN ALKYLENE OXIDE USING A HIGH EFFICIENCY CATALYST - Methods of reducing the value of an alkylene oxide production parameter (such as alkylene oxide production rate) in a process of making an alkylene oxide by reacting an alkylene and oxygen over a high efficiency catalyst are shown and described. One method comprises reducing the concentration of oxygen in the reactor feed gas to reduce the value of the alkylene oxide production parameter. | 09-19-2013 |
| 20130310584 | OLEFIN EPOXIDATION PROCESS - A process for the production of an olefin oxide, which process comprises reacting a feed comprising an olefin and oxygen in a reactor tube in the presence of a silver-containing catalyst, wherein the presence of water in the catalyst bed is controlled such that the ratio of the partial pressure of water (PPH | 11-21-2013 |
| 20140012022 | PROCESS FOR CONDITIONING A HIGH EFFICIENCY ETHYLENE OXIDE CATALYST - A process for conditioning a high efficiency silver catalyst used to manufacture ethylene oxide from ethylene, oxygen, and at least one organic chloride is described. A non-reactive conditioning gas comprising at least one of ethylene, oxygen, and a ballast gas is introduced to the catalyst at a conditioning temperature ranging from 150° C. to 180° C. for a selected period of at least 4 hours. | 01-09-2014 |
| 20140031568 | EPOXIDATION PROCESS - A method for producing ethylene oxide comprising: providing one or more feed components, wherein the one or more feed components contains at least ethylene obtained by dehydrating ethanol; contacting the one or more feed components with a desulfurization catalyst comprising a high surface area support and an amount of silver, wherein at least 20% of the silver is present as oxidized silver; and contacting the one or more feed components with a silver-containing epoxidation catalyst disposed inside an ethylene oxide reactor to form a reaction gas comprising ethylene oxide. | 01-30-2014 |
| 20140088316 | ALKYLENE OXIDE CATALYST AND USE THEREOF - A supported silver catalyst and use thereof in a process for producing an alkylene oxide, such as ethylene oxide, by the direct oxidation of an alkylene with oxygen or an oxygen-containing gas, wherein the catalyst provides improved stability and improved resilience to reactor upsets and timely recovery to substantially pre-upset levels of catalyst activity and/or efficiency. In some embodiments, the catalyst also exhibits improved activity. A catalyst capable of producing ethylene oxide at a selectivity of at least 87 percent while achieving a work rate of at least 184 kg/h/m | 03-27-2014 |
| 20140135513 | EO REACTOR, PROCESS AND THERMOCOUPLE PLACEMENT - Techniques are provided for determining the proper way to load thermocouple reactor tubes in multi-tubular ethylene oxide reactors containing a large number of reactor tubes containing silver catalysts. In these techniques, it is necessary to adjust the pressure drop so that oxygen conversion by thermocouple reactor tubes will closely match that of non-thermocouple reactor tubes. | 05-15-2014 |
| 20140187807 | START-UP PROCESS FOR HIGH SELECTIVITY ETHYLENE OXIDE CATALYSTS - A high selectivity catalyst start-up process is provided in which an excess level of chloride moderator (greater than 1 ppm) is present in the feed gas composition during each of the various stages of the start-up process. The excess level of chloride used in the start-up process maintains a low level of selectivity (less than 86%) during the entire start-up process. Despite the low selectivity values achieved during the start-up process of the present disclosure, high selectivity catalysts that are conditioned by such a start-up process exhibit improved catalyst performance during the normal operation of the catalyst. | 07-03-2014 |
| 20140316150 | METHOD OF REDUCING OR MAINTAINING THE VALUE OF AN ALKYLENE OXIDE PRODUCTION PARAMETER IN A PROCESS OF MAKING AN ALKYLENE OXIDE USING A HIGH EFFICIENCY CATALYST - Methods of reducing or maintaining the value of an alkylene oxide production parameter (such as alkylene oxide production rate) in a process of making an alkylene oxide by reacting an alkylene and oxygen over a high efficiency catalyst are shown and described. One method comprises reducing the concentration of oxygen in the reactor feed gas to reduce or maintain the value of the alkylene oxide production parameter. | 10-23-2014 |
| 20140364636 | PROCESS FOR PREPARATION OF AG-W OXIDE CATALYST FOR THE SELECTIVE CONVERSION OF PROPROPYLENE TO PROPYLENE OXIDE WITH MOLECULAR OXYGEN - The present invention provides a process for preparation of Ag-W oxide catalyst for the direct and selective conversion of propylene to propylene oxide. The process provides a direct single step selective vapour phase oxidation of propylene to propylene oxide using molecular oxygen over Ag-W oxide catalysts. The process provides propylene conversion of 10-50% and selectivity for propylene oxide up to 100%. | 12-11-2014 |
| 20150045565 | PROCESS FOR PREPARING AN OLEFIN OXIDE USING A MULTI-LOBED POROUS CERAMIC BODY - A carrier having at least three lobes, a first end, a second end, a wall between the ends and a non-uniform radius of transition at the intersection of an end and the wall is disclosed. A catalyst comprising the carrier, silver and promoters deposited on the carrier and useful for the epoxidation of olefins is also disclosed. A method for making the carrier, a method for making the catalyst and a process for epoxidation of an olefin with the catalyst are also disclosed. | 02-12-2015 |
| 20150080590 | PROCESS FOR THE PRODUCTION OF ETHYLENE OXIDE - The invention relates to a process for the production of ethylene oxide, comprising the steps of: producing ethylene resulting in a stream comprising ethylene and ethane; separating the stream comprising ethylene and ethane into a stream comprising ethylene and ethane in which stream the amount of ethylene is greater than the amount of ethane and a stream comprising ethane and ethylene in which stream the amount of ethane is greater than the amount of ethylene; producing ethylene oxide by subjecting ethylene and ethane from the stream comprising ethylene and ethane, in which stream the amount of ethylene is greater than the amount of ethane, to oxidation conditions resulting in a stream comprising ethylene oxide, unconverted ethylene and ethane; and recovering ethylene oxide from the stream comprising ethylene oxide, unconverted ethylene and ethane | 03-19-2015 |
| 20150119590 | ALUMINA CARRIER, METHOD OF PREPARING THE SAME, AND SILVER CATALYST - The present disclosure discloses an α-alumina carrier, comprising the elements of lanthanum and silicon both dispersed in the interior and on the surface of the carrier. The mass ratio of the element of lanthanum to the element of silicon is in the range from 0.1:1 to 20:1. The inventors of the present disclosure have made extensive researches into the field of the silver catalyst and alumina carrier thereof, and added the elements of lanthanum and silicon (i.e., bulk phase addition) in preparing the alumina carrier used in the silver catalyst. The carrier thus obtained contains the elements of silicon and lanthanum both in the interior and on the surface thereof, and has improved specific surface area and strength. The silver catalyst prepared with the carrier can react in a low reaction temperature (has a high reaction activity) and has a high selectivity in producing ethylene oxide through oxidation of ethylene. | 04-30-2015 |
| 20150368215 | THERMO-MECHANICALLY INTEGRATED PROCESS FOR THE PRODUCTION OF ETHYLENE OXIDE FROM A FLOW OF ETHANOL - Dehydrating an ethanol feed to form ethylene then oxidation of the ethanol to ethylene oxide: vaporization of an ethanol feed and at least a portion of a flow of diluting water comprising recycled ethanol so as to produce a vaporized feed, compression in a compressor driven by a condensing turbine driven by the steam generated by an oxidation step, dehydration of a mixture of compressed vaporized feed, separation of effluent obtained from dehydration into ethylene and water, purification of at least a portion of effluent containing water and separation into at least a flow of treated water and a flow of diluting water containing ethanol, recycling the latter upstream of the vaporization, oxidation of ethylene containing in the effluent into ethylene oxide, in at least one tubular oxidation reactor cooled by vaporization of a quench flow, said vaporized quench flow being used to drive a condensing turbine. | 12-24-2015 |
| 20160251326 | SILVER CATALYSTS WITH IMPROVED SIZE AND DISTRIBUTION DENSITY OF SILVER PARTICLES | 09-01-2016 |
