Patent application number | Description | Published |
20080281118 | EPOXIDATION 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, A 1,2-CARBONATE, OR AN ALKANOLAMINE - A catalyst for the epoxidation of an olefin comprising a carrier and, deposited on the carrier, silver, a rhenium promoter, a first co-promoter, and a second co-promoter; wherein the quantity of the rhenium promoter deposited on the carrier is greater than 1 mmole/kg, relative to the weight of the catalyst; | 11-13-2008 |
20080306289 | CATALYST COMPOSITION, A PROCESS FOR PREPARING THE CATALYST COMPOSITION AND A USE OF THE CATALYST COMPOSITION - A catalyst composition comprising a support having a surface area of at least 500 m | 12-11-2008 |
20090275764 | 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. | 11-05-2009 |
20090281339 | PROCESS FOR THE START-UP OF AN EPOXIDATION PROCESS, A PROCESS FOR THE PRODUCTION OF ETHYLENE OXIDE, A 1,2-DIOL, A 1,2-DIOL ETHER, A 1,2-CARBONATE, OR AN ALKANOLAMINE - A process is provided for the start-up of an ethylene epoxidation process comprising: (a) contacting a catalyst bed comprising a high selectivity epoxidation catalyst with a feed comprising ethylene, oxygen and an organic chloride for a period of time until an increase of at least 1×10 | 11-12-2009 |
20090281345 | PROCESS FOR THE PRODUCTION OF AN OLEFIN OXIDE, A 1,2-DIOL, A 1,2-DIOL ETHER, A 1,2-CARBONATE, OR AN ALKANOLAMINE - A process for the epoxidation of an olefin comprising contacting a reactor feed comprising an olefin, oxygen, and carbon dioxide, with a catalyst comprising a carrier and, deposited on the carrier, silver, a rhenium promoter, and a potassium promoter; wherein
| 11-12-2009 |
20090286998 | PROCESS FOR THE PREPARATION OF ALKYLENE CARBONATE AND/OR ALKYLENE GLYCOL - The invention provides a reaction system for the production of an alkylene carbonate and/or an alkylene glycol comprising: an epoxidation zone containing an epoxidation catalyst located within an epoxidation reactor; a carboxylation zone containing an iodide-containing carboxylation catalyst located within an alkylene oxide absorber; and one or more purification zones containing a purification absorbent capable of reducing the quantity of iodide-containing impurities in a feed comprising a recycle gas, which purification zones are located upstream from the epoxidation zone; and a process for the production of an alkylene carbonate and/or an alkylene glycol. | 11-19-2009 |
20090287011 | PROCESS FOR THE PREPARATION OF AN ALKYLENE CARBONATE AND AN ALKYLENE GLYCOL - The invention provides a reaction system for the production of an alkylene carbonate comprising: an epoxidation zone containing an epoxidation catalyst located within an epoxidation reactor; a carboxylation zone containing an bromide-containing carboxylation catalyst located within an alkylene oxide absorber; and one or more purification zones containing a purification absorbent capable of reducing the quantity of bromide-containing impurities in a feed comprising a recycle gas, which purification zones are located upstream from the epoxidation zone; and a process for the production of an alkylene carbonate and an alkylene glycol. | 11-19-2009 |
20110034710 | EPOXIDATION 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, A 1,2-CARBONATE, OR AN ALKANOLAMINE - A catalyst for the epoxidation of an olefin comprising a carrier and, deposited on the carrier, silver, a rhenium promoter, a first co-promoter, and a second co-promoter; wherein the molar ratio of the first co-promoter to the second co-promoter is greater than 1; the first co-promoter is selected from sulfur, phosphorus, boron, and mixtures thereof; and the second co-promoter is selected from tungsten, molybdenum, chromium, and mixtures thereof; a process for preparing the catalyst; a process for preparing an olefin oxide by reacting a feed comprising an olefin and oxygen in the presence of the catalyst; and a process for preparing a 1,2-diol, a 1,2-diol ether, a 1,2-carbonate, or an alkanolamine. | 02-10-2011 |
20110105771 | PROCESS FOR THE PRODUCTION OF AN OLEFIN OXIDE, A 1,2-DIOL, A 1,2-DIOL ETHER, A 1,2-CARBONATE, OR AN ALKANOLAMINE - A process for the epoxidation of an olefin comprising contacting a reactor feed comprising an olefin, oxygen, and carbon dioxide, with a catalyst comprising a carrier and, deposited on the carrier, silver, a rhenium promoter, a first co-promoter, and a second co-promoter; wherein the carbon dioxide is present in the reactor feed in a quantity of at most 3 mole percent based on the total epoxidation reactor feed; the first co-promoter is selected from sulfur, phosphorus, boron, and mixtures thereof; and the second co-promoter is selected from tungsten, molybdenum, chromium, and mixtures thereof; a process for preparing a 1,2-diol, a 1,2-diol ether, a 1,2-carbonate, or an alkanolamine. | 05-05-2011 |
20110288339 | REACTOR SYSTEM, AN ABSORBENT AND A PROCESS FOR REACTING A FEED - The present invention provides a reactor system comprising: —one or more purification zones comprising an absorbent which comprises silver, an alkali or alkaline earth metal, and a support material having a surface area of more than 20 m2/g, and —a reaction zone comprising a catalyst, which reaction zone is positioned downstream from the one or more purification zones; an absorbent; a process for reacting a feed comprising one or more feed components; and a process for preparing a 1,2-diol, a 1,2-diol ether, a 1,2-carbonate, or an alkanolamine. | 11-24-2011 |
20120016143 | EPOXIDATION CATALYST, A PROCESS FOR PREPARING THE CATALYST, ANDA PROCESS FOR THE PROUCTION OF AN OLEFIN OXIDE - A catalyst for the epoxidation of an olefin comprising a carrier and deposited on the carrier, silver, a promoting amount of one or more promoters selected from the group consisting of alkali metals and rhenium and a promoting amount of nickel, wherein the nickel is added as a nickel compound or nickel complex during the initial impregnation along with the silver and other promoters; including a process for preparing the catalyst; a process for preparing an olefin oxide by reacting a feed comprising an olefin and oxygen in the presence of the catalyst; and a process for preparing a 1,2-diol, a 1,2-diol ether, a 1,2-carbonate, or an alkanolamine. | 01-19-2012 |
20120149926 | PROCESS FOR IMPROVING THE SELECTIVITY OF AN EO CATALYST - The present invention relates to a process for improving the overall selectivity of an EO process for converting ethylene to ethylene oxide utilizing a highly selective EO silver catalyst containing a rhenium promoter wherein following normal operation a chloride strip of the chloride on the surface of the catalyst is conducted in order to remove a portion of the chlorides on the surface of the catalyst. The chloride strip involves the addition of certain saturated hydrocarbons to the feed. Following the chloride strip, the catalyst is optionally re-optimized. | 06-14-2012 |
20120213679 | PROCESS FOR THE PREPARATION OF ALKYLENE CARBONATE AND/OR ALKYLENE GLYCOL - The invention provides a reaction system for the production of an alkylene carbonate and/or an alkylene glycol comprising: an epoxidation zone containing an epoxidation catalyst located within an epoxidation reactor; a carboxylation zone containing an iodide-containing carboxylation catalyst located within an alkylene oxide absorber; and one or more purification zones containing a purification absorbent capable of reducing the quantity of iodide-containing impurities in a feed comprising a recycle gas, which purification zones are located upstream from the epoxidation zone; and a process for the production of an alkylene carbonate and/or an alkylene glycol. | 08-23-2012 |
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 |
20120277447 | PROCESS FOR IMPROVING THE SELECTIVITY OF AN EO CATALYST - The present invention relates to a process for improving the selectivity of an EO process utilizing a highly selective EO catalyst. In particular, the present invention is an improvement in the initial operation of a process for manufacturing ethylene oxide by contacting ethylene, oxygen, a chloride moderator and a hydrocarbon co-moderator with a high selectivity silver-containing catalyst at a concentration of carbon dioxide of less than about 2 mole percent, wherein the initial operating temperature is determined by optimization of such initial operating temperature at a level higher than the normal low initial operating temperature that is typically selected to obtain a longer operating cycle. | 11-01-2012 |
20120309992 | PROCESS FOR IMPROVING THE SELECTIVITY OF AN EO CATALYST - The present invention relates to a process for improving the overall selectivity of an EO process for converting ethylene to ethylene oxide utilizing a highly selective EO silver catalyst containing a rhenium promoter wherein following normal operation a hard strip of the chloride on the surface of the catalyst is conducted in order to remove a portion of the chlorides on the surface of the catalyst. Following the hard strip, the catalyst is optionally re-optimized. Surprisingly, it has been found that the selectivity of the catalyst following the hard strip may be substantially higher than the selectivity prior to the hard strip. | 12-06-2012 |
20120315198 | PROCESS FOR THE PREPARATION OF AN ALKYLENE CARBONATE AND AN ALKYLENE GLYCOL - The invention provides a reaction system for the production of an alkylene carbonate comprising: an epoxidation zone containing an epoxidation catalyst located within an epoxidation reactor; a carboxylation zone containing an bromide-containing carboxylation catalyst located within an alkylene oxide absorber; and one or more purification zones containing a purification absorbent capable of reducing the quantity of bromide-containing impurities in a feed comprising a recycle gas, which purification zones are located upstream from the epoxidation zone; and a process for the production of an alkylene carbonate and an alkylene glycol. | 12-13-2012 |
20120323026 | EPOXIDATION CATALYST, A PROCESS FOR PREPARING THE CATALYST, AND A PROCESS FOR THE PRODUCTION OF AN OLEFIN OXIDE - A catalyst for the epoxidation of an olefin comprising a carrier and, deposited thereon, silver, a rhenium promoter, a first co-promoter, and a second co-promoter; wherein
| 12-20-2012 |
20150086437 | REACTOR SYSTEM, AN ABSORBENT AND A PROCESS FOR REACTING A FEED - Reactor systems are provided that comprise a purification zone comprising an absorbent which comprises silver, an alkali or alkaline earth metal, and a support material having a surface area of more than 20 m | 03-26-2015 |