| Patent Number |
Title Of Patent |
Date Issued |
| 7217836 |
Process for producing (meth)acrolein and/or (meth)acrylic acid |
May 15, 2007 |
| A method for producing (meth)acrolein and/or (meth)acrylic acid by subjecting isobutylene and the like or propylene to a vapor-phase catalytic oxidation with molecular oxygen in the presence of a solid oxidation catalyst in a tubular type of fixed bed reactor, wherein a temperature o |
| 7098281 |
Plastic optical fiber, optical fiber cable, optical fiber cable with plug, method for producing |
August 29, 2006 |
| This invention provides a process for manufacturing a methyl methacrylate polymer comprising the steps of feeding a monomer containing at least 80 wt % of methyl methacrylate and a radical polymerization initiator represented formula (III) to a reactor; polymerizing the material at a |
| 6969774 |
Method for producing methacrylic acid |
November 29, 2005 |
| In a method for synthesizing methacrylic acid by using a fixed bed tube type reactor provided with a catalyst bed into which a solid oxidation catalyst is filled and with a heat medium bath and by flowing a raw material gas containing methacrolein and oxygen through the catalyst bed, |
| 6930201 |
Process for producing methacrylic acid |
August 16, 2005 |
| In a method of producing methacrylic acid by passing a material gas containing methacrolein, oxygen and water vapor through a reactor packed with a catalyst containing as the main component a compound oxide containing molybdenum and phosphorus, a concentration of methacrolein in the |
| 6777083 |
Plastic optical fiber, optical fiber cable, optical fiber cable with plug, method for producing |
August 17, 2004 |
| This invention provides a process for manufacturing a methyl methacrylate polymer comprising the steps of feeding a monomer containing at least 80 wt % of methyl methacrylate and a radical polymerization initiator represented formula (III) to a reactor; polymerizing the material at a |
| 6710204 |
Decreasing method of N-oxyl compound |
March 23, 2004 |
| There is provided a superior decreasing method of an N-oxyl compound contained in an easily polymerizable material, according to which the N-oxyl compound contained in an easily polymerizable material can be sufficiently decreased and loss of the easily polymerizable material is litt |
| 6642394 |
Process for producing (meth)acrylic anhydride and process for producing (meth)acrylic ester |
November 4, 2003 |
| (Meth)acrylic acid is reacted with a fatty acid anhydride and the resultant reaction mixture is neutralized and washed with an aqueous alkaline solution having a pH of 7.5 to 13.5. Thus, high-purity (meth)acrylic anhydride can be industrially advantageously produced while avoiding po |
| 6348619 |
Process for producing a carboxylic acid ester by reacting an aldehyde and an alcohol using a pal |
February 19, 2002 |
| A carboxylic acid ester is prepared by a process comprising:reacting an aldehyde and an alcohol in a liquid phase in the presence of molecular oxygen as indicated by the following reaction:in the presence of a catalyst comprising at least palladium and an element X, wherein X is bismuth, lea |
| 6346646 |
Process for producing methacrolein and methacrylic acid |
February 12, 2002 |
| A process for producing methacrolein and methacrylic acid by catalytically oxidizing isobutylene or tertiary butanol in the presence of a catalyst comprising a compound oxide containing molybdenum, bismuth and iron as the essential components, wherein a catalytic oxidation reaction is st |
| 5892108 |
Method for packing with catalyst for synthesis of unsaturated aldehyde and unsaturated carboxyli |
April 6, 1999 |
| A method for packing of catalyst, which comprises mixing, into a shaped catalyst containing at least molybdenum and iron, used in the gas-phase catalytic oxidation of propylene, isobutylene, tert-butyl alcohol or methyl tert-butyl ether with molecular oxygen to synthesize an unsaturated |
| 5892102 |
Catalyst used in production of carboxylic acid esters and process for producing these esters |
April 6, 1999 |
| A catalyst for the production of carboxylic acid esters for use in reacting an aldehyde with an alcohol in a liquid phase in the presence of molecular oxygen, comprising calcium carbonate and palladium, bismuth and at least one element selected from the group consisting of barium, iron, |
| 5550095 |
Process for producing catalyst used for synthesis of methacrylic acid |
August 27, 1996 |
| There is provided a process for efficient production of a solid catalyst usable for synthesis of methacrylic acid from methacrolein which comprises adding a lower alcohol or acetone to a dried product obtained from a mixed solution or aqueous slurry containing at least Mo, P and V as cat |
| 5532199 |
Carrier-supported catalyst for the synthesis of unsaturated aldehydes and unsaturated carboxylic |
July 2, 1996 |
| A carrier-supported catalyst for the synthesis of unsaturated aldehydes and unsaturated carboxylic acids, comprising a catalyst active substance comprising at least molybdenum and bismuth as its components, glass fiber having an average diameter in a range of more than 5 .mu.m and not mo |
| 5491258 |
Molded catalyst or supported catalyst for synthesizing methacrolein and methacrylic acid, a proc |
February 13, 1996 |
| For providing a molded catalyst or a supported catalyst which has an excellent mechanical strength and is intended for producing methacrolein and methacrylic acid from isobutylene or tertiary butanol, the surface of a molded catalyst or a supported catalyst which contains molybdenum, |
| 5422326 |
Process for preparing a catalyst for producing methacrylic acid |
June 6, 1995 |
| When a catalyst for producing methacrylic acid is prepared by shaping a catalyst component represented by the general formula P.sub.a Mo.sub.b V.sub.c X.sub.d Y.sub.e Z.sub.f O.sub.g wherein P, Mo, V, X, Y, Z, a, b, c, d, e, f and g are as defined in the specification, a catalyst capable |
| 5420091 |
Method of preparing catalyst used for producing methacrylic acids |
May 30, 1995 |
| A method of preparing a catalyst used for producing methacrylic acids through gas phase catalytic oxidation of methacrolein with molecular oxygen. The catalyst is represented by the formula:wherein P, Mo, V, Ge and O represent phosphorous, molybdenum, vanadium, germanium and oxygen, resp |
| 5349092 |
Process for producing catalysts for synthesis of unsaturated aldehydes and unsaturated carboxyli |
September 20, 1994 |
| Disclosed is a process for producing a multicomponent catalyst containing molybdenum and bismuth and used for synthesis of unsaturated aldehydes and unsaturated carboxylic acids, characterized in that dried starting materials for the catalyst are calcinated in an atmosphere containing 1 |
| 5250485 |
Process for preparing catalysts used for production of methacrolein and methacrylic acid |
October 5, 1993 |
| A process for preparing a catalyst used for production of methacrolein and methacrylic acid by vapor phase oxidation of isobutylene or tertiary butanol includes adding an organic high-molecular weight compound having an average particle size of 0.01 .mu.m to 10 .mu.m, especially polymeth |
| 5208371 |
Process for production of methacrolein and methacrylic acid |
May 4, 1993 |
| The invention provides a process for industrially and advantageous production of methacrolein and methacrylic acid which comprises subjecting isobutylene or tert-butanol to gas phase catalytic oxidation with a molecular oxygen-containing gas in the presence of a catalyst having the c |
| 5166119 |
Preparation of catalysts for producing methacrolein and methacrylic acid |
November 24, 1992 |
| A method for preparing a multicomponent catalyst including molybdenum, bismuth, iron and cesium or thallium for producing methacrolein and methacrylic acid by the gas-phase catalytic oxidation of isobutylene or tert-butanol with molecular oxygen, wherein an aqueous nitric acid soluti |
| 5126307 |
Process for preparing catalyst for producing methacrylic acid and catalyst prepared by process |
June 30, 1992 |
| A process for preparing a multi-component catalyst for producing methacrylic acid, containing phosphorus, molybdenum and vanadium, comprising mixing oxides of molybdenum and vanadium, water and materials for the other catalyst-constituting elements except potassium, rubidium, cesium |
| 5104844 |
Process of preparing catalysts for producing methacrylic acid |
April 14, 1992 |
| A process for preparing a multi-component catalyst for producing methacrylic acid containing phosphorus, molybdenum and vanadium comprising using in preparing the catalyst, at least one number selected from the group consisting of the oxide, carbonates, acetates and hydroxides of each |
| 5102847 |
Process for preparing catalysts for producing methacrylic acid |
April 7, 1992 |
| In a process for preparing a catalyst for producing methacrylic acid represented by the formula,wherein P, Mo, V, Cu, Bi and O are phosphorus, molybdenum, vanadium, copper, bismuth and oxygen, respectively, X is at least one element selected from the group consisting of potassium, rubidi |
| 5102846 |
Process for preparing catalysts for producing methacrylic acid |
April 7, 1992 |
| In a process for producing a catalyst having a composition represented by the following formula usable to produce methacrylic acid by the gas-phase catalytic oxidation of methacrolein with molecular oxygen,wherein P, Mo, Cu, V and O are phosphorus, molybdenum, copper, vanadium and oxygen |
| 5093521 |
Process for producing methacrylic acid |
March 3, 1992 |
| A process for producing methacrylic acid which includes subjecting methacrolein to gaseous phase catalytic oxidation using molecular oxygen and a catalyst represented by the general formula:wherein P, Mo, V, Fe, Ce, NH.sub.4 and O represent phosphorus, molybdenum, vanadium, iron, cerium, |
| 4968838 |
Process for the preparation of unsaturated carboxylic acids |
November 6, 1990 |
| The present invention provides a process for the preparation of a catalyst used in the production of unsaturated carboxylic acids such as methacrylic acid by the gas phase catalytic oxidation of the corresponding unsaturated aldehydes such as methacrolein. Said catalyst is composed of a |
| 4891347 |
Process for the preparation of catalyst used in the production of unsaturated carboxylic acids |
January 2, 1990 |
| The present invention provides a process for the preparation of a catalyst used in the production of unsaturated carboxylic acids such as methacrylic acid by the gas phase catalytic oxidation of the corresponding unsaturated aldehydes such as methacrolein. Said catalyst is composed of a |
| 4816603 |
Process for the production of methacrolein and methacrylic acid |
March 28, 1989 |
| The present invention provides a process for the production of methacrolein and methacrylic acid by the gas phase catalytic oxidation of isobutylene or t-butanol at high temperature using molecular oxygen in the presence of catalyst consisting of molybdenum, tungsten, bismuth, iron, nick |
| 4804778 |
Process for producing methacrylic acid |
February 14, 1989 |
| Disclosed is a process for producing methacrylic acid from methacrolein in high yields and at high selectivity which comprises vapor phase catalytic oxidation of methacrolein with molecular oxygen, characterized by using a catalyst represented by the formula: P.sub.a Mo.sub.b V.sub.c Cu. |
| 4803302 |
Process for the production of methacrylic acid |
February 7, 1989 |
| A catalyst represented by the general formulawherein X represents at least one or more of the elements selected form the group consisting of potassium, rubidium, cesium and thallium, Y represents at least one or more of the elements selected from the group consisting of tellurium, lantha |
