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| Number | Title | Issue Date |
| 7847118 | Process for continuous heterogeneously catalyzed partial dehydrogenation of at least one hydrocarbon to be dehydrogenated A process for continuous heterogeneously catalyzed partial dehydrogenation of at least one hydrocarbon to be dehydrogenated in a reactor which is manufactured from a composite material which consists, on its side in contact with the reaction chamber, of a steel B wi... | 12/07/2010 |
| 7179366 | Catalyst based on a group VI metal and a group VIII metal at least partially present in the form of heteropolyanions in the oxide precursor A catalyst contains at least one group VIII element and at least molybdenum and/or tungsten, said elements being present at least in part in the catalyst in the dry state in the form of at least one heteropolyanion with formula MxAB6O24 | 02/20/2007 |
| 7160578 | Method for depositing aluminum oxide coatings on flat glass A chemical vapor deposition process for laying down an aluminum oxide coating on a glass substrate through the use of an organic ester having a β hydrogen on the alkyl group bonded to the carboxylate oxygen and an inorganic aluminum halide. The resulting article ha... | 01/09/2007 |
| 7012039 | Oxide catalyst composition An oxide catalyst composition for use in producing methacrolein or a mixture of methacrolein and methacrylic acid, wherein the oxide catalyst composition is represented by the formula (Mo+W)l2BiaAbBcFedXe | 03/14/2006 |
| 6835849 | Synthesis of alkenoate esters from lactones and alcohols The invention relates to the synthesis of alkenoate esters from a corresponding lactone and an alcohol in the presence of a basic catalyst. More specifically, this invention relates to the synthesis of methyl-4-pentenoate ester from 5-methyl butyrolactone and methan... | 12/28/2004 |
| 6624326 | Method for preparing heteropolyacid catalyst and method for producing methacrylic acid A novel method for preparing a heteropolyacid catalyst containing a heteropolyacid composed of molybdophosphoric acid and/or molybdovanadophosphoric acid, or a salt of the heteropolyacid, is provided. The method comprises preparing an aqueous solution or ... | 09/23/2003 |
| 5543558 | Method for producing unsaturated organics from organic-containing feeds A method includes producing an unsaturated organic compound from an organic component of an organic-containing feed. A reactor is provided which contains a molten metal bath. The molten metal bath includes a metal, such as a suitable transition metal, whi... | 08/06/1996 |
| 5132449 | Method for the catalytic vapor phase oxydehydrogenation of isobutyric acid The invention relates to the stabilization of the activity and/or the reactivation of molybdoheteropoly acid catalysts in vapor-phase oxidations, such as the oxidehydrogenation of isobutyric acid or its lower esters to methacrylic acid or its lower esters... | 07/21/1992 |
| 5068399 | Process for preparing unsaturated carboxylic acid ester Disclosed is a process for preparing, , ଲ-unsaturated carboxylic acid ester from -hydroxycarboxylic acid ester, a -alkoxycarboxylic acid ester or ଲ-alkoxycarboxylic acid ester as a starting material by a vapor-phase cataly... | 11/26/1991 |
| 4978776 | Process for the manufacture of methyl methacrylate from isobutyric acid A process for the manufacture of methyl methacrylate from isobutyric acid employing a catalytic oxidative dehydrogenation reaction in the vapor phase followed by condensation, liquid-liquid extraction, esterification, separation and purification steps.... | 12/18/1990 |
| 4966990 | Process for producing methacrylic acid and/or methacrylic acid ester A process for producing methacrylic acid and/or methacrylic acid ester by oxidative dehydrogenation of isobutyric acid and/or isobutyric acid ester, wherein the improvement comprises using a catalyst having the composition represented by (Mo)a ... | 10/30/1990 |
| 4886891 | Process for preparing 1,1-disubstituted ethylene derivative by reaction of lead with a carbinol derivative The present invention provides a process for preparing a 1,1-disubstituted ethylene derivative of the formula ##STR1## which comprises reacting lead with a carbinol derivative of the formula ##STR2## wherein R1, R2, R3... | 12/12/1989 |
| 4864057 | Dehydrogenation of carboxylic acids with mixed metal phosphorus oxide catalysts A process is provided for the oxydehydrogenation of saturated carboxylic acids or a lower alkyl ester thereof with oxygen in the presence of iron phosphorus oxide catalysts containing promoters selected from the group Ag, Al, B, Be, Cd, Co, Cu, Ga, Ge, In... | 09/05/1989 |
| 4791080 | Oxidative catalyst regeneration Method for regenerating catalysts containing molybdenum, phosphorus, and vanadium in oxidic association and useful for the oxydehydrogenation of isobutyric acid or its lower esters to form methacrylic acid or its lower esters, by oxidizing the spent catal... | 12/13/1988 |
| 4777285 | Preparation of alkenecarboxylates Alkenecarboxylates of the formula I ##STR1## where R1 is alkyl of 1 to 6 carbon atoms and n is 2, 3 or 4, are prepared by a process which comprises reacting a lactone of the formula II ##STR2## where R2 is hydrogen or methy... | 10/11/1988 |
| 4743706 | Preparation of unsaturated acids and esters by oxidative condensation This invention relates to a novel vapor phase process for the production of unsaturated acids and esters, such as acrylic acid and methyl acrylate, by reacting a primary alcohol with a saturated monocarboxylic acid, ester, or anhydride in the presence of ... | 05/10/1988 |
| 4720575 | H8 PMo10 VO39 and its anhydride, PMo10 VO35 and preparation therewith of methacrylic acid and its lower alkyl ester The molybdovanadophosphoric acid H8 PMo10 VO39, its PMo10 VO35 anhydride, methods for their preparation, and methods for making methacrylic acid and its esters by oxidation/dehydrogenation wherein the... | 01/19/1988 |
| 4677225 | Process for the production of acrylic acid or methacrylic acid A process for producing acrylic acid or methacrylic acid by reacting acetic acid or propionic acid with formaldehyde in a gas phase is described, characterized by carrying out the reaction in the presence of a solid catalyst containing at least one of bor... | 06/30/1987 |
| 4607122 | High selectivity process for vapor phase oxydehydrogenation of alkanoic acids, such as isobutyric acid, using Dawson structure phosphomolybdic acid A novel method of converting alkanoic acids, such as isobutyric acid, to alpha-beta unsaturated acids, such as methacrylic acid, is disclosed which exhibits a higher degree of selectivity than those vapor phase oxydehydration methods heretofore known to t... | 08/19/1986 |
| 4600795 | Preparation and recovery of methacrylic acid and its esters In the recovery and purification of methacrylic acid or its esters produced by the vapor phase catalytic oxydehydrogenation of isobutyric acid or its esters the problem of downstream plugging is avoided by the inclusion of a small amount of surfactant in ... | 07/15/1986 |
| 4579967 | Production of alkyl methacrylate This invention provides a process for converting alkyl isobutyrate to alkyl methacrylate via alkyl-hydroperoxy-isobutyrate and alkyl alpha-hydroxyisobutyrate intermediate. An important aspect of the process is the use of a particulate metal oxide substrat... | 04/01/1986 |
| 4564699 | Oxydehydrogenation process An isobutyric acid ester is oxidatively dehydrogenated in the vapor phase producing the corresponding methacrylic acid ester by contact with a heterogeneous catalyst, molecular oxygen and an amine. The catalyst may be any of a number of well known oxydehy... | 01/14/1986 |
| 4506095 | Production of linear alkenoic acids and esters This invention provides a process for producing alkenoate products in the presence of an ethylaluminum dichloride type catalyst, such as the production of methyl 5-hexenoate by the reaction between propylene and methyl acrylate.... | 03/19/1985 |
| 4471061 | Methods for treatment of phosphomolybdic acid based catalysts during reactor shutdown The present invention relates to a method for maintaining the activity of PMA based catalysts during reactor shutdown by flushing the reactor with an oxide of nitrogen gas at a temperature of from about 150° C. to about 370° C. The method can be employ... | 09/11/1984 |
| 4471062 | Method for the reactivation of deactivated phosphomolybdic acid based catalysts The present invention relates to a method for the reactivation of phosphomolybdic acid based catalysts used for the conversion of saturated and unsaturated aldehydes to acids. The method comprises the step of feeding an oxide of nitrogen over the deactiva... | 09/11/1984 |
| 4442123 | 6-Chloro-6-deoxy-D-hexitols, compositions containing them and their use in fertility control 6-Chloro-6-deoxy-D-hexitols, a novel class of compounds, and their esters, possess male antifertility activity and are thus useful in antifertility compositions. They are prepared by reduction of 6-chloro-6-deoxy-D-hexoses.... | 04/10/1984 |
| 4439621 | Oxydehydrogenation process Isobutyric acid or a lower alkyl ester thereof is oxidatively dehydrogenated in the vapor phase producing the corresponding olefinically unsaturated derivative by contact with a heterogeneous catalyst in the presence of molecular oxygen. The catalyst is c... | 03/27/1984 |
| 4427792 | Iron-phosphorus mixed oxide catalysts and process for their preparation A process is provided for the preparation of iron phosphorous mixed oxide catalysts which are highly active at moderate temperatures by introducing iron and phosphorus containing compounds and promoter element containing compounds, if any, into a substant... | 01/24/1984 |
| 4410723 | Oxydehydrogenation process Isobutyric acid or a lower alkyl ester thereof is oxidatively dehydrogenated in the vapor phase producing the corresponding alpha, beta-olefinically unsaturated derivative by contact with a heterogeneous catalyst in the presence of molecular oxygen. The c... | 10/18/1983 |
| 4391990 | Oxydehydrogenation of isobutyric acid and its lower alkyl esters Isobutyric acid or a lower alkyl ester thereof is oxidatively dehydrogenated in the vapor phase producing the corresponding ,ଲ-olefinically unsaturated derivative by contact with a heterogeneous catalyst in the presence of molecular oxygen. T... | 07/05/1983 |
| 4391989 | Oxydehydrogenation of isobutyric acid and its lower alkyl esters Isobutyric acid or a lower alkyl ester thereof is oxidatively dehydrogenated in the vapor phase to produce the corresponding ,B-olefinically unsaturated derivative by contact with a heterogeneous catalyst in the presence of molecular oxygen. The ca... | 07/05/1983 |
| 4390725 | Oxydehydrogenation process for preparing methacrylic acid and its lower alkyl esters Isobutyric acid or a lower alkyl ester thereof is oxidatively dehydrogenated in the vapor phase producing the corresponding ,ଲ-olefinically unsaturated derivative by contact with a heterogeneous catalyst in the presence of molecular oxygen. T... | 06/28/1983 |
| 4374270 | Oxydehydrogenation process for preparing methacrylic acid and its lower alkyl esters Isobutyric acid or a lower alkyl ester thereof is oxidatively dehydrogenated in the vapor phase producing the corresponding ,ଲ-olefinically unsaturated derivative by contact with a heterogeneous catalyst in the presence of molecular oxygen. T... | 02/15/1983 |
| 4374269 | Oxydehydrogenation process for preparing methacrylic acid and its lower alkyl esters Isobutyric acid or a lower alkyl ester thereof is oxidatively dehydrogenated in the vapor phase producing the corresponding ,ଲ-olefinically unsaturated derivative by contact with a heterogeneous catalyst in the presence of molecular oxygen. T... | 02/15/1983 |
| 4374268 | Catalytic oxydehydrogenation process Isobutyric acid or a functional equivalent; e.g., a lower alkyl ester is oxidatively dehydrogenated to effect the vapor phase conversion thereof to the corresponding ,ଲ-ethylenically unsaturated derivative by contact with a heterogeneous cata... | 02/15/1983 |
| 4370490 | Process for producing methacrylic acid by oxidative dehydration of isobutyric acid and catalyst therefor Isobutyric acid is oxidatively dehydrogenated to methacrylic acid by passing a gaseous mixture of isobutyric acid, oxygen, nitrogen and optionally water vapor at temperatures of 300°-450° C. and pressures of 0.5 to 5 bar over a catalyst comprising molyb... | 01/25/1983 |
| 4355176 | Oxydehydrogenation process for preparing methacrylic acid and its lower alkyl esters Isobutyric acid or a lower alkyl ester thereof is oxidatively dehydrogenated in the vapor phase producing the corresponding ,ଲ-olefinically unsaturated derivative by contact with a heterogeneous catalyst in the presence of molecular oxygen. T... | 10/19/1982 |
| 4338463 | Process for the production of unsaturated acids and esters Compositions of the empirical formula: where M is at least one of K, Rb and Cs; M' is at least one of Cu and V; X is at least one of Ba, Zn, Ga, Nb, Cd, Ti, Ca, Bi, Mg, Ta, Zr, Ce, Ni, Co, Cr, Fe and Tl when a>0; a is a number of 0 to about 2; and b is a number tha... | 07/06/1982 |
| 4331813 | Process for making esters of unsaturated acids Methyl methacrylate or other -ଲ unsaturated esters are prepared by contacting an oxydehydrogenation-esterification catalyst with a feed mixture of a saturated acid (e.g., isobutyric acid), an alkyl alcohol (e.g., methanol), oxygen, with or wi... | 05/25/1982 |
| 4314075 | Process for the production of olefinic acids and esters Olefinic acids and esters, such as methacrylic acid and methylmethacrylate, are prepared by contacting in the presence of molecular oxygen the corresponding saturated acid or ester, such as isobutyric acid or methylisobutyrate with the catalyst of the emp... | 02/02/1982 |
