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| Number | Title | Issue Date |
| 7442816 | Antimony vanadium phosphate A new composition, SbVPO6+δ, in which 0≦δ≦ 1.5, has been prepared. Crystals of the compound have been grown by several methods, and the crystal structure has been determined. It is related in structure to vanadyl pyrophosphate (VPO), an important se... | 10/28/2008 |
| 7365217 | Oxidation process A process is disclosed for reacting an olefin, hydrogen, and oxygen in a reactor in the presence of an epoxidation catalyst comprising a transition metal zeolite and a noble metal to produce a product stream comprising an epoxide and an alkane. The alkane is separat... | 04/29/2008 |
| 7354771 | Method of determining absolute configuration of chiral compound The absolute configuration of a chiral compound is determined by (i) coordinating the chiral compound to a metalloporphyrin having a carbon chain-crosslinked porphyrin dimer structure in which one of the two porphyrin rings has at least one ethyl or substituent bulk... | 04/08/2008 |
| 7326810 | Method for starting up reactor In the reaction of catalytic gas phase oxidation induced by the supply of at least a raw material to be oxidized and a molecular oxygen-containing gas to a reactor for catalytic gas phase oxidation, a method for starting up the reactor for catalytic gas phase oxidat... | 02/05/2008 |
| 7087767 | Method for producing maleic anhydride Process for preparing maleic anhydride by heterogeneously catalyzed gas-phase oxidation of hydrocarbons having at least four carbon atoms by means of oxygen-containing gases at from 350 to 500° C. in the presence of a volatile phosphorus compound over a vanadium-, ... | 08/08/2006 |
| 7060649 | Method for the production of a catalyst containing vanadium, phosphorus, and oxygen Disclosed is a method for producing a catalyst containing vanadium, phosphorus, and oxygen, which is used for oxidizing the gas phase of a hydrocarbon having at least four carbon atoms to maleic anhydride. According to the inventive method, a corresponding catalyst ... | 06/13/2006 |
| 6956004 | Vanadium/phosphorus mixed oxide catalyst Active vanadium/phosphorus mixed oxide catalyst for the conversion of non-aromatic hydrocarbons, e.g., n-butane, into maleic anhydride. The catalyst is prepared from the catalyst precursor, that is, prepared by the reaction of a source of vanadium in an organic medi... | 10/18/2005 |
| 6903047 | Vanadium-phosphorus oxide catalysts with promoter reagents The present invention concerns a method for enhancing the activity of vanadium phosphorus oxide (VPO) catalysts. Promoter reagents are grafted onto or reacted with the catalyst surface. An optional calcination and activation heating cycle transforms the catalyst pre... | 06/07/2005 |
| 6624315 | Method of gas phase catalytic oxidation to give maleic acid anhydride A process for the preparation of maleic anhydride by heterogeneously catalyzed gas-phase oxidation in a reactor with feed for the reaction mixture at one end of the reactor and discharge of the product mixture at the opposite end of the reactor, and with ... | 09/23/2003 |
| 6462041 | Gambogic acid, analogs and derivatives as activators of caspases and inducers of apoptosis The present invention is directed to gambogic acid, analogs and derivatives thereof, represented by the general Formulae I-III: ##STR1## wherein R1 -R5 are defined herein. The present invention also relates to the discovery that comp... | 10/08/2002 |
| 6413903 | High surface area sol-gel route prepared oxidation catalysts This invention relates to catalysts useful in the vapor phase oxidation of hydrocarbons, such as 1,3-butadiene to furan and maleic anhydride. The catalysts comprise vanadium oxides, vanadium phosphorus oxides or vanadium antimony oxides incorporated in a ... | 07/02/2002 |
| 6310219 | Process for the production of maleic anhydride Disclosed is a process for the production of maleic anhydride, which comprises: reacting a hydrocarbon with an oxygen-containing gas in the presence of a catalyst; recovering maleic anhydride from the reaction gas; recovering unreacted hydrocarbon from th... | 10/30/2001 |
| 6048987 | Process for producing coated catalysts for the synthesis of maleic anhydride by gas-phase oxidation There is a process for producing coated catalysts for the gas-phase oxidation of C4 hydrocarbons to maleic anhydride. A vanadyl phosphate catalyst precursor is prepared having a V/P ratio of from 1:0.5 to 1:2 and a mean vanadium oxidation state... | 04/11/2000 |
| 6005121 | High productivity process for the production of maleic anhydride An improved process for the manufacture of maleic anhydride by catalytic oxidation of a nonaromatic hydrocarbon having at least four carbon atoms in a straight chain, in which a gas containing oxygen and hydrocarbon is passed through a fixed catalyst bed ... | 12/21/1999 |
| 5959124 | Method of preparing maleic anhydride by vapor phase oxidation of hydrocarbon A vanadium-phosphorus oxide having an X-ray diffraction spectrum (Cu--K) showing main peaks of the diffraction angle 2θ(&#b1;0.2°) at 18.5°, 23.0°, 28.4°, 29.9°, and 43.1° and having the intensity ratio of the peaks of the diffraction a... | 09/28/1999 |
| 5932746 | Vanadium catalysts and their precursors Readily processible cluster compositions of vanadium and phosphorus are precursors to vanadium-phosphorus catalysts including vanadyl pyrophosphate and vanadylbis(metaphosphate).... | 08/03/1999 |
| 5929256 | Production of maleic anhydride using molybdenum-modified vanadium-phosphorus oxide catalysts An active catalyst having a crystal structure corresponding to that of a catalyst that has been prepared and activated by the following process. A substantially pentavalent vanadium-containing compound is reacted with a pentavalent phosphorus-containing c... | 07/27/1999 |
| 5847163 | Process for the transformation of a vanadium/phosphorus mixed oxide catalyst precursor into the active catalyst for the production of maleic anhydride A vanadium/phosphorus mixed oxide catalyst precursor is transformed into the active catalyst for the production of maleic anhydride. The activation takes place in a fluidized bed and includes the steps of (a) initially heating the precursor; (b) further h... | 12/08/1998 |
| 5726327 | Process for the production of petrochemicals Petrochemicals are produced by the vapor phase reaction of a hydrocarbon with air in the presence of a suitable catalyst. The petrochemical product is removed from the product gas stream, and unreacted hydrocarbon in part or all of the remaining gas strea... | 03/10/1998 |
| 5646304 | Process for the production of petrochemicals A petrochemical is produced by the vapor phase reaction of a hydrocarbon with air in the presence of a suitable catalyst. The petrochemical is removed from the reactor effluent, and part or all of the remaining petrochemical-free gas stream is passed thro... | 07/08/1997 |
| 5550308 | Vanadium (IV)-containing nasicon materials The present invention provides a composition of matter having the formula Ax B1-x Vy C1-y P3 O10-15 wherein A is Nb or Ta, B is Sb, C is Ti or Sn, and 0ࣘx,yࣘ1, a composition of matter having the ... | 08/27/1996 |
| 5543532 | Catalyst and method for vapor phase oxidation of alkane hydrocarbons This invention relates to cation substituted catalysts based primarily upon vanadium pyrophosphate, useful in the oxidation of alkane hydrocarbons.... | 08/06/1996 |
| 5521134 | Method for regenerating vanadium/phosphorus oxidation catalysts A method of regenerating V/P/O oxidation catalyst used for the partial oxidation of n-butane which comprises terminating the n-butane feed and contacting the catalyst with an oxygen containing gas, such as air for a sufficient period of time to regenerate... | 05/28/1996 |
| 5498731 | Oxide catalyst and process for producing maleic anhydride by using oxide catalyst An oxide catalyst for producing maleic anhydride by vapor phase oxidation of a hydrocarbon having 4 carbon atoms, obtainable by (1) reacting a pentavalent vanadium compound and a pentavalent phosphorus compound in an organic solvent in the presence of a r... | 03/12/1996 |
| 5364824 | Catalysis for the production of maleic anhydride containing vanadium-phosphorus oxide with selected promoter elements A phosphorus vanadium oxide catalyst for the oxidation of a C4 hydrocarbon. The catalyst comprises a shaped body having a volume, or a fixed bed comprising shaped bodies having an average volume, of at least about 0.02 cc, and contains a promot... | 11/15/1994 |
| 5360916 | Two stage butane haleic anhydride process Butane is oxidized with molecular oxygen in a dilute state by bringing a mixture of vaporized butane and air of controlled butane content into the presence of a contact vanadium-phosphorus-oxygen catalyst in a first oxidation zone under controlled pressur... | 11/01/1994 |
| 5348927 | Treatment for virgin phosphorous/vanadium oxidation catalysts A method of removing chloride from phosphorus/vanadium/oxygen mixed oxide oxidation catalysts comprising treating a chloride containing catalyst comprising phosphorus, vanadium and oxygen with a stream of gas comprising oxygen, steam and an inert gas at f... | 09/20/1994 |
| 5326886 | Maintaining VPO catalyst performance by aluminizing reactor internals in oxidation of butane to maleic anhydride Catalysts comprising a compound of vanadium, phosphorus and oxygen which are employed in the oxidation of n-butane to maleic anhydride are protected from contamination caused by side reactions which occur between the catalyst and steel process equipment b... | 07/05/1994 |
| 5296436 | Phosphorous/vanadium oxidation catalyst An improvement in the oxidation catalyst used for the partial oxidation of n-butane and containing vanadium and phosphorus, zinc, lithium and molybdenum mixed oxides which comprises adding the molybdenum as a compound which is dissolved in a solvent durin... | 03/22/1994 |
| 5288880 | Process for the manufacture of maleic anhydride The present invention provides a process for the manufacture of maleic anhydride by the vapor phase catalytic oxidation of n-butane with molecular oxygen by the use of a specially prepared phosphorus vanadium-oxygen composite catalyst containing specific ... | 02/22/1994 |
| 5262548 | Phosphorous/vanadium oxidation catalyst An improvement in the oxidation catalyst used for the partial oxidation of n-butane and containing vanadium and phosphorus, zinc and lithium mixed oxides which comprises adding a molybdenum compound modifier in an amount of from about 0.005 to 0.025/1 Mo/... | 11/16/1993 |
| 5235071 | Catalyst for producing phthalic anhydride and process by using the same The invention relates to a catalyst for producing phthalic anhydride by gas phase catalytic oxidation of o-xylene and/or naphthalene with molecular oxygen or gas containing molecular oxygen and, to a process for producing phthalic anhydride by using said ... | 08/10/1993 |
| 5225574 | Preparation of phthalic anhydride from o-xylene Phthalic anhydride is prepared in a multiple tube reactor provided with separate salt baths, the temperature of the salt bath used for cooling the first layer of catalyst, as regarded in the direction of flow of the reaction mixture, being from 2° to 20Â... | 07/06/1993 |
| 5179215 | Process for the production of petrochemicals An improved process is provided for the production of a petrochemical by the vapor phase reaction of a hydrocarbon with an oxygen-containing gas in the presence of a suitable catalyst to produce a flammable gaseous product stream comprising the desired pe... | 01/12/1993 |
| 5158923 | Phosphorous/vanadium oxidation catalyst An improvement in the oxidation catalyst used for the partial oxidation of n-butane and containing vanadium and phosphorus, zinc and lithium mixed oxides which comprises adding a molybdenum compound modifier in an amount of from about 0.005 to 0.025/1 Mo/... | 10/27/1992 |
| 5155235 | Catalyst for producing maleic anhydride from butane and process for preparing same A catalyst for producing maleic anhydride by oxidation of n-butane comprising V,P and additionally Mg or Zr is prepared by (a) heating a pentavalent vanadium compound in an organic medium to reduce at least a part of the pentavalent vanadium to tetravalent van... | 10/13/1992 |
| 5128299 | Process for producing crystalline oxide of vanadium-phosphorus system A process for producing a crystalline oxide of vanadium-phosphorus system, which comprises hydrothermally treating an aqueous medium containing (1) a tetravalent vanadium compound, (2) a pentavalent phosphorus compound, (3) a coordinate compound having at... | 07/07/1992 |
| 5126463 | Process for the production of anhydrides This invention provides a process for the production of an anhydride by the vapor phase reaction of a hydrocarbon with substantially pure oxygen in the presence of a suitable catalyst. In the improved process, the anhydride product is removed, carbon mono... | 06/30/1992 |
| 5124291 | Method for deagglomerating and re-exposing catalyst in a fluid bed reactor A fluid bed catalyst which has lost activity or fluidization quality through agglomeration, contamination, or a physical or chemical change on the surface of the catalyst is deagglomerated and/or its surface re-exposed, by contacting the fluidized catalys... | 06/23/1992 |
| 5095125 | Maleic anhydride production A catalyst comprising a phosphorus-vanadium mixed oxide and existing in the form of geometric shapes, such as tablets, provides minimum expansion of the geometric shapes under process reaction conditions, since the catalyst in the form of said geometric s... | 03/10/1992 |
