Class / Patent application number | Description | Number of patent applications / Date published |
549532000 | Air or molecular oxygen utilized | 23 |
20140309442 | EPOXIDATION PROCESS - A method for the oxidation of ethylene to form ethylene oxide is provided that includes passing an aqueous stream through a guard bed and one or more ion exchange treatment beds. The guard bed and the aqueous stream contain from about 0.2 to 20 wt % ethylene glycol. The guard bed contains a cross-linked polystyrene resin, partially functionalized with quaternary ammonium functional groups and the resin has a surface area of greater than 400 m | 10-16-2014 |
549533000 | Heavy metal containing catalyst utilized | 22 |
20080255379 | Direct epoxidation process using a mixed catalyst system - The invention is a process for epoxidizing an olefin with hydrogen and oxygen in the presence of a catalyst mixture containing a titanium or vanadium zeolite and a supported catalyst comprising palladium, gold, and an inorganic oxide carrier. Prior to its use in the epoxidation process, the supported catalyst is calcined in the presence of oxygen at a temperature from 450 to 800° C. and reduced in the presence of hydrogen at a temperature greater than 20° C. The process results in significantly reduced alkane byproduct formed by the hydrogenation of olefin. | 10-16-2008 |
20090054670 | Process for Producing of Epoxy Compound - An object of the present invention is to provide an efficient process for producing an epoxy compound from olefin, oxygen and hydrogen. The process of the present invention is characterized in that an olefin, oxygen and hydrogen are reacted in a liquid phase in the presence of a titanosilicate selected from the group consisting of a crystalline titanosilicate having MEL structure, MTW structure, BEA structure, MWW structure or DON structure, a mesoporous titanosilicate and a lamellar titanosilicate, a noble metal catalyst, and a quinoid compound or a dihydro-form of quinoid compound. | 02-26-2009 |
20090112006 | Direct epoxidation process using improved catalyst composition - Catalysts useful for the direct epoxidation of olefins are disclosed. The catalysts comprise a noble metal, lead, bismuth, and a titanium or vanadium zeolite. The noble metal, lead, and bismuth may be supported on the titanium or vanadium zeolite. The catalyst may also be a mixture comprising the titanium or vanadium zeolite and a supported catalyst comprising the noble metal, lead, bismuth, and a carrier. The invention includes a process for producing an epoxide comprising reacting an olefin, hydrogen and oxygen in the presence of the catalyst. The process results in significantly reduced alkane byproduct formed by the hydrogenation of olefin. | 04-30-2009 |
20090192323 | Spray-dried transition metal zeolite and its use - A catalyst comprising a spray-dried transition metal zeolite and a noble metal is disclosed. The spray-dried transition metal zeolite comprises a transition metal zeolite and a binder. At least 50 wt. % of the binder is titania. The catalyst is used in a process to produce an epoxide by reacting an olefin, hydrogen, and oxygen. The catalyst is easy to filter from a slurry and produces a reduced level of hydrogenation products. | 07-30-2009 |
20090209772 | Method for Producing Epoxy Compound - A method for producing an epoxy compound characterized by comprising contacting an olefin, oxygen and hydrogen with a noble metal and a crystalline titanosilicate having an MFI structure in a liquid phase in the presence of a quinoid compound selected from the group consisting of a phenanthraquinone compound and a compound represented by formula (1) | 08-20-2009 |
20090247773 | Propylene oxide process - A process for making propylene oxide from propylene is disclosed. Propylene, hydrogen, and oxygen are reacted in a slurry comprising a catalyst and a solvent to produce a gaseous product stream and a liquid product stream. The gaseous product stream is contacted with an absorbent to produce a gas effluent and a liquid effluent. The gas effluent is recycled to the reaction step. | 10-01-2009 |
20090264665 | PROCESS FOR PRODUCING PROPYLENE OXIDE - A process for more efficiently producing propylene oxide from propylene, oxygen, and hydrogen with catalysts which comprise a noble metal and a titanosilicate having pores not smaller than a 12-membered oxygen ring. The process for propylene oxide production is characterized by reacting propylene, oxygen, and hydrogen in a solution comprising water, a nitrite compound, and an ammonium salt in the presence of a noble metal catalyst and a titanosilicate catalyst having pores not smaller than a 12-membered oxygen ring. | 10-22-2009 |
20100056815 | METHOD FOR PRODUCING PROPYLENE OXIDE - A method for producing propylene oxide according to the present invention includes the step of reacting propylene, oxygen and hydrogen in a liquid phase in the presence of titanosilicate and a noble metal catalyst supported on a carrier comprising a noble metal catalyst and activated carbon having total pore volume of 0.9 cc/g or more. This makes it possible to provide a method for efficiently producing propylene oxide from propylene, oxygen, and hydrogen. | 03-04-2010 |
20100076208 | HYDRO-OXIDATION PROCESS USING A CATALYST PREPARED FROM A GOLD CLUSTER COMPLEX - A process and catalyst for the hydro-oxidation of an olefin having three or more carbon atoms, such as propylene, to form an olefin oxide, such as propylene oxide. The process involves contacting the olefin with oxygen in the presence of hydrogen and a hydro-oxidation catalyst under reaction conditions; the catalyst comprising gold nanoparticles deposited on a nanoporous titanium-containing support, prepared by depositing a gold-ligand cluster complex onto the support to form a catalyst precursor, and then heating and/or chemically treating the catalyst precursor to form the hydro-oxidation catalyst composition. The hydro-oxidation catalyst exhibits stabilized catalyst activity, enhanced lifetime, and improved hydrogen efficiency. | 03-25-2010 |
20100094031 | INTEGRATED HYDRO-OXIDATION PROCESS WITH SEPARATION OF AN OLEFIN OXIDE PRODUCT STREAM - An integrated process providing for a gas phase hydro-oxidation of an olefin, preferably, propylene, with oxygen in the presence of hydrogen and a catalyst under reaction conditions such as to form a gaseous hydro-oxidation effluent stream containing an olefin oxide product, preferably, propylene oxide, water, unconverted olefin, oxygen, and hydrogen; and further providing for separation and recovery of the olefin oxide product from the effluent stream. The separation involves feeding the hydro-oxidation effluent stream into a first distillation column employing a liquid reflux rectification agent to obtain a first overhead stream containing unconverted olefin, oxygen, and hydrogen, which is recycled to the hydro-oxidation reactor, and a first bottoms stream containing water and the olefin oxide, from which upon further separation a purified olefin oxide product is recovered. | 04-15-2010 |
20100174100 | METHOD FOR PRODUCING PROPYLENE OXIDE - A method is for producing propylene oxide, including reacting propylene, hydrogen, and oxygen, in an acetonitrile solvent or in a mixture of solvents which include acetonitrile and water, in presence of a titanosilicate catalyst and a palladium catalyst supported on a carrier, the propylene being fed into the reaction in the form of liquefied propylene. This realizes efficient production of propylene oxide. | 07-08-2010 |
20100197947 | APPARATUS AND METHOD FOR PRODUCING EPOXY COMPOUND - The present invention provides an apparatus for producing an epoxy compound derived from an olefin by causing a reaction of hydrogen, oxygen, and the olefin in a liquid solvent in the presence of a catalyst in a reactor, wherein a vapor phase in the reactor contains an inert gas; hydrogen, an oxygen-containing gas with an oxygen concentration of at least 90% by volume, and the olefin are supplied to the vapor phase and/or liquid phase of the reactor to cause a reaction; and there exist a means for taking out the liquid phase containing the reaction product from the reactor. | 08-05-2010 |
20100234623 | METHOD FOR PRODUCING PROPYLENE OXIDE - Disclosed is a method for producing propylene oxide wherein propylene is directly oxidized with oxygen, as required, water and a catalytic amount of hydrogen in a gas phase in the presence of a gold cluster catalyst supported on an alkali-treated titanosilicalite or mesoporous titanosilicate support, which is produced by an alkaline treatment of titanosilicalite or mesoporous titanosilicate with aqueous solution of NaOH, KOH or CsOH. | 09-16-2010 |
20100317880 | Direct epoxidation process using modifiers - The invention is a process for epoxidizing an olefin with hydrogen and oxygen in a solvent comprising tertiary butyl alcohol or acetonitrile in the presence of an amide modifier and a catalyst comprising titanium-MWW zeolite and a noble metal. The process produces less ring-opened products such as glycols and glycol ethers when performed in the presence of the amide, while maintaining low alkane byproduct formed by the hydrogenation of olefin. | 12-16-2010 |
20110098491 | Direct epoxidation process using alkanoic acid modifier - The invention is a process for epoxidizing an olefin with hydrogen and oxygen in the presence of an alkanoic acid and a catalyst comprising a noble metal and a titanium zeolite, wherein the catalyst has not been reduced prior to epoxidation. This process surprisingly gives significantly improved productivity and reduced formation of unwanted propane compared to processes that do not use the alkanoic acid modifier. | 04-28-2011 |
20110112315 | METHODS OF PRODUCING EPOXIDES FROM ALKENES USING A TWO-COMPONENT CATALYST SYSTEM - Methods for the epoxidation of alkenes are provided. The methods include the steps of exposing the alkene to a two-component catalyst system in an aqueous solution in the presence of carbon monoxide and molecular oxygen under conditions in which the alkene is epoxidized. The two-component catalyst system comprises a first catalyst that generates peroxides or peroxy intermediates during oxidation of CO with molecular oxygen and a second catalyst that catalyzes the epoxidation of the alkene using the peroxides or peroxy intermediates. A catalyst system composed of particles of suspended gold and titanium silicalite is one example of a suitable two-component catalyst system. | 05-12-2011 |
20110152550 | Direct epoxidation catalyst and process - A catalyst, useful for the direct epoxidation of olefins, is disclosed. The catalyst comprises palladium nanoparticles, support nanoparticles, and a titanium zeolite having a particle size of 2 microns or greater. The palladium nanoparticles are deposited on the support nanoparticles to form supported palladium nanoparticles, and the supported palladium nanoparticles are deposited on the titanium zeolite; or the supported palladium nanoparticles are deposited on a carrier having a particle size of 2 microns or greater. The invention also includes a process for producing an epoxide comprising reacting an olefin, hydrogen and oxygen in the presence of the catalyst. The catalysts are more active in epoxidation reactions, while demonstrating the same or better selectivity. | 06-23-2011 |
20110251413 | METHOD FOR PRODUCING PROPYLENE OXIDE - The present invention relates to a method for producing propylene oxide comprising the step of producing propylene oxide from hydrogen, oxygen and propylene in the presence of a noble metal catalyst, a titanosilicate and an organic sulfur compound in a mixed solvent of water and a nitrile compound, wherein the titanosilicate has a pore composed 12- or more-membered oxygen ring. | 10-13-2011 |
20110288316 | METHOD FOR PRODUCING PROPYLENE OXIDE - A method for producing propylene oxide which comprises reacting propylene, oxygen and hydrogen, in the presence of a titanosilicate and a noble metal supported on silylated active carbon, in a solvent. | 11-24-2011 |
20120083612 | DIRECT EPOXIDATION CATALYST - The invention is a process for epoxidizing an olefin with hydrogen and oxygen in a solvent comprising acetonitrile in the presence of an quinone-acid salt and a catalyst comprising a titanium zeolite and a noble metal. The process results in higher productivity and improved selectivity to propylene oxide from hydrogen and oxygen, as compared to processes that use only a quinone. | 04-05-2012 |
20120296102 | METHOD FOR PRODUCING PROPYLENE OXIDE - It is intended to provide a production method for producing propylene oxide from propylene, hydrogen and oxygen, with improved reaction rate. The present invention provides a method for producing propylene oxide, comprising a step of reacting propylene, hydrogen and oxygen, in the presence of a Pd-supported catalyst, a titanosilicate catalyst and a Pd-free carbon material, in a liquid phase. | 11-22-2012 |
20140114083 | PRODUCTION OF OXIDIZED OLEFINS - The present disclosure includes a system and method for the production of oxidized olefins. Two or more reactors include a number of reaction tubes each having a first surface defining a first side and a second surface defining a second of each of the tubes side are provided. A catalyst for catalytic oxidation of olefins can be located on the first side of the number of reaction tubes is included. A common supply line supplies inlets to each reactor that provide a mixture comprising olefins and oxygen to the catalyst. Product outlet streams of each reactor receive at least the oxidized olefin product and are joined to a single product stream. Coolant fluid passes through the reactors to remove heat from the number of reaction tubes and flows into a single coolant drum connected to the two or more reactors. The single coolant drum receives the coolant fluid from a number of coolant fluid outlet streams of each of the reactors. The single coolant drum supplies the coolant fluid at a common temperature to a number of coolant fluid inlet streams of each reactor. | 04-24-2014 |