Did You Know...
...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!
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| Number | Title | Issue Date |
| 7935834 | Catalysts for maleic acid hydrogenation to 1,4-butanediol This invention relates to a process for catalytically hydrogenating a hydrogenatable precursor in contact with a hydrogen-containing gas and a hydrogenation catalyst comprising one or more active hydrogenation catalyst components on a support comprising titanium dio... | 05/03/2011 |
| 7427579 | Hydrogenation catalyst, preparation thereof, and method for the preparation of gamma-butyrolactone from maleic anhydride using the catalyst The present invention relates to a hydrogenation catalyst represented by the following formula 1, a method for the preparation thereof, and a method for preparing gamma-butyrolactone using this catalyst. The method for preparing gamma-butyrolactone from maleic anhyd... | 09/23/2008 |
| 7271299 | Two-stage method for producing butanediol with intermediated separation of succinic anhydride Optionally alkyl-substituted 1,4-butanediol is prepared from C4-dicarboxylic acids and/or of derivatives thereof by: a) a gas stream of the C4-dicarboxylic acid or the derivative thereof in a first reactor in ... | 09/18/2007 |
| RE39794 | Process for the simultaneous production of maleic anhydride and its hydrogenated derivatives A process is described for the co-production of maleic anhydride and at least one C4 compound selected from butane-1,4-diol, γ-butyrolactone, and tetrahydrofuran in which maleic anhydride is produced by partial oxidation of a hydrocarbon feedstock select... | 08/21/2007 |
| 7214641 | Catalyst and hydrogenation of carbonyl compounds in the liquid phase using the catalyst The present invention provides a process for hydrogenating carbonyl compounds, in particular C4-dicarboxylic acids to mixtures of tetrahydrofuran and gamma-butyrolactone, over supported rhenium catalysts, wherein rhenium and at least one further metal of ... | 05/08/2007 |
| 7208565 | Polymerization catalyst for polyesters, polyester produced with the same, and process for production of polyester This invention provides a novel polycondensation catalyst using no antimony compound, polyester produced by using the same, and a process for producing polyester. A novel catalyst comprising an aluminum compound and a phosphorus compound is used as the polycondensat... | 04/24/2007 |
| 7193091 | Method for the simultaneous production of tetrahydrofurans and pyrrolidones A process for coproducing alkyl-substituted or unsubstituted THF and pyrrolidones by catalytically hydrogenating C4-dicarboxylic acids and/or derivatives thereof in the gas phase in the presence of copper catalysts and reacting GBL with ammonia or primary amines to ... | 03/20/2007 |
| 7172989 | Catalytic hydrogenation over rhenium-containing catalysts supported on activated carbon In a process for preparing alcohols by catalytic hydrogenation of carbonyl compounds over a catalyst comprising rhenium on activated carbon, the catalyst used comprises rhenium (calculated as metal) in a weight ratio to the activated carbon of from 0.0001 to 0.5, pl... | 02/06/2007 |
| 7060858 | Method for manufacturing sulfonium salts It is an object of the invention to provide a method which makes it possible to manufacture the desired sulfonium salts directly without using a metathesis process and without using acids in large excess amounts. An aryl compound (A) in which a hydrogen atom is bond... | 06/13/2006 |
| 7005059 | Catalyst having at least one element of group VIIB and its use in hydro-treating The invention relates to a catalyst for the transformation of hydrocarbon-containing feedstocks, in particular hydrotreatment, comprising at least one metal of group VIIB and at least one hydro-dehydrogenating metal (of the non-noble metals of group VIII and/or the ... | 02/28/2006 |
| 6958404 | Method for the hydrogenation of maleic anhydride and related compounds in a fluid bed reactor C4-dicarboxylic acids or derivatives thereof are hydrogenated in the gas phase in a fluidized-bed reactor. It is possible to use catalyst compositions known per se. ... | 10/25/2005 |
| 6906228 | Method for catalytic hydrogenation on rhenium-containing active carbon carrier catalysts In a process for preparing alcohols by catalytic hydrogenation of carbonyl compounds over a catalyst comprising rhenium on activated carbon, the catalyst used comprises rhenium (calculated as metal) in a weight ratio to the activated carbon of from 0.0001 to 0.5, pl... | 06/14/2005 |
| 6831182 | Method for the hydrogenation of maleic anhydride and related compounds in two serial reaction zones The present invention relates to a process for the gas-phase hydrogenation of C4-dicarboxylic acids and/or their derivatives over a catalyst based on copper oxide to give substituted or unsubstituted γ-butyrolactone and/or tetrahydrofuran, which comprise... | 12/14/2004 |
| 6670300 | Textured catalysts, methods of making textured catalysts, and methods of catalyzing reactions conducted in hydrothermal conditions A textured catalyst having a hydrothermally-stable support, a metal oxide and a catalyst component is described. Methods of conducting aqueous phase reactions that are catalyzed by a textured catalyst are also described. The invention also provides method... | 12/30/2003 |
| 6492535 | Process for the production of gamma-butyrolactone A process for the production of gamma-butyrolactone. Starting from maleic and/or succinic anhydride the conversion takes place in the vapor phase of a Cu/Cr catalyst.... | 12/10/2002 |
| 6479704 | Hydrogenation with monolith reactor under conditions of immiscible liquid phases The present invention relates to an improved for the hydrogenation of an immiscible mixture of an organic reactant in water. The immiscible mixture can result from the generation of water by the hydrogenation reaction itself or, by the addition of, water ... | 11/12/2002 |
| 6433193 | Process to afford gamma butyrolactone and tetrahydrofuran A process for production of tetrahydrofuran and gamma butyrolactone by hydrogenation of maleic anhydride recovered from a process of conversion of a n-butane. The process consists essentially of the following steps: A) converting n-butane to maleic anhydr... | 08/13/2002 |
| 6380402 | Preparation of gamma-butyrolactone by catalytic hydrogenation of maleic anhydride Disclosed is a process for effecting liquid-phase hydrogenation of MAN to GBL in high conversion and high selectivity. The present invention provides an improved process of catalytic hydrogenation for converting MAN or SA to GBL in the liquid phase in the... | 04/30/2002 |
| 6376414 | Method for producing catalysts containing ruthenium and the use thereof for hydrogenation The invention relates to catalysts containing ruthenium and at least one other metal having an atomic number in the range of from 23 to 82 prepared by (a) mixing a suspension of a ruthenium compound having a specific surface area in the range of from 50 t... | 04/23/2002 |
| 6299736 | Process for recovering γ-butyrolactone from a mixture of heavy organics Gamma-Butyrolactone (GBL) is recovered from a mixture containing GBL and other heavy organics by a process of azeotropic distillation in the presence of a C8-C 10 hydrocarbon as an azeotroping agent, wherein an azeotrope of GBL and t... | 10/09/2001 |
| 6274743 | Process for the preparation of butanediol, butyrolactone and tetrahydrofuran Butane-1,4-diol, gamma-butyrolactone or tetrahydrofuran are prepared by vapor phase hydrogenation of a C4-dicarboxylic acid derivative. A maleic anhydride containing vapor stream is contacted in an absorption zone with a first high boiling solvent. A wast... | 08/14/2001 |
| 6225477 | Process for regeneration of carbon-supported, rhenium-containing catalysts This invention relates to a method of improving the catalytic performance of palladium or ruthenium, rhenium-on-carbon hydrogenation catalysts operating in aqueous media where loss of soluble rhenium may result in rapid catalytic failure. A rhenium-contai... | 05/01/2001 |
| 6204395 | Process for the preparation of butane-1,4-diol, γ-butyrolactone and tetrahydrofuran A process is described for the production of butane-1,4-diol, γ-butyrolactone and/or tetrahydrofuran. A vaporous stream containing maleic anhydride, water, and carbon oxides is contact in an absorption zone with a high boiling ester as solvent to form a ... | 03/20/2001 |
| 6133464 | Chiral ferrocenyls The invention relates to chiral ferrocenyls of formula (I) ##STR1## wherein Ra is --P(R10 R11) or --SR12 ; Rb is --P(R'10 R'11), --SR'12, --CH.dbd.NR12, --C... | 10/17/2000 |
| 6100410 | Process for the production of 1,4-butanediol, γ-butyrolactone and tetrahydrofuran A process for the production of at least one C4 compound selected from butane-1,4-diol, γ-butyrolactone and tetrahydrofuran comprises contacting a vaporous stream containing maleic anhydride vapour, water vapour, and carbon oxides in an absorp... | 08/08/2000 |
| 6077964 | Process for preparing gamma-butyrolactone, butane-1, 4-diol and tetrahydrofuran A process is described for the production of at least one C4 compound selected from butane-1,4-diol, γ-butyrolactone and tetrahydrofuran, which includes the step of hydrogenation in the vapour phase of maleic anhydride in the presence of a het... | 06/20/2000 |
| 6075153 | Process for the preparation of Gamma-Butyrolactone and the use thereof A process for manufacturing gamma-butyrolactone by the catalytic hydrogenation of maleic anhydride, succinic anhydride or their acids in the vapor phase in the presence of catalysts based on copper oxide and aluminum oxide in reduced form is described. Th... | 06/13/2000 |
| 6028033 | N-aminopyridone derivatives and their use as herbicides There are described N-aminopyridone derivatives of the formula I: ##STR1## where the substituents R1 to R12 have the meanings given in claim 1, a process for their preparation, and their use for controlling undesirable vegetatio... | 02/22/2000 |
| 6008384 | Method and Ru,Re,Sn/carbon catalyst for hydrogenation in aqueous solution An improved two step (dual stage catalysis) aqueous hydrogenation process and a novel trimetallic hydrogenation catalysts consisting essentially of highly dispersed, reduced ruthenium and rhenium metals in the presence of a third metal tin on carbon suppo... | 12/28/1999 |
| 5985789 | Ru, Sn/oxide catalyst and process for hydrogenation in acidic aqueous solution Improved hydrogenation catalysts consisting essentially of reduced or at least partially reduced ruthenium and tin on a refractory oxide support which is insoluble in aqueous acid. Such catalysts are very durable and exhibit high conversion rates in aqueo... | 11/16/1999 |
| 5698713 | Process for the production of gamma-butyrolactone Disclosed is a process for the production of gamma-butyrolactone from maleic anhydride or succinic anhydride by hydrogenation in the presence of a catalyst composition comprising the mixed oxides of copper, zinc and zirconium.... | 12/16/1997 |
| 5637735 | Process for the preparation of gamma-butyrolactone A process for vapor phase hydrogenation of maleic anhydride and/or succinic anhydride to γ-butyrolactone, comprising contacting an alcoholic solution of a feedstock anhydride with reduced Cu-Zn-Cr-Zr catalyst under the conditions of hydrogenation.... | 06/10/1997 |
| 5580991 | Process for preparing butyrolactone and method for separating organic phosphorous-ruthenium complex as catalyst and reusing the same The disclosure describes a method for separating a ruthenium complex, which comprises removing an objective hydrogenation reaction product from a hydrogenation reaction solution of an organic carbonyl compound in the presence of a ruthenium complex having... | 12/03/1996 |
| 5536849 | Process for producing gamma-butyrolactone Gamma-butyrolactone is produced by catalytic hydrogenation of maleic anhydride in the vapor phase in the presence of copper chromite based catalysts in reduced form. The reaction is carried out using a substantially uniform catalyst derived substantially ... | 07/16/1996 |
| 5502217 | Process for preparing lactones A lactone is prepared by catalytically hydrogenating a dicarboxylic acid having 3 to 10 carbon atoms or a functional derivative thereof in the presence of a catalyst comprising a metal selected from the elements of group VIII of the periodic table or a co... | 03/26/1996 |
| 5478952 | Ru,Re/carbon catalyst for hydrogenation in aqueous solution Improved hydrogenation catalysts consisting essentially of highly dispersed, reduced ruthenium and rhenium on carbon support and methods of making and using the same. Such catalysts exhibit high conversion rates in aqueous solution hydrogenation of hydrog... | 12/26/1995 |
| 5347021 | Process of vapor phase catalytic hydrogenation of maleic anhydride to gamma-butyrolactone in high conversion and high selectivity using an activated catalyst Vapor phase catalytic hydrogenation of maleic anhydride to gamma-butyrolactone is achieved in a conversion of 95% or more and a selectivity of 80% or more during a prolonged period of production. The process uses an activated catalyst prepared by reducing... | 09/13/1994 |
| 5319111 | Preparation of tetrahydrofuran and gamma-butyrolactone A process for the preparation of tetrahydrofuran or tetrahydrofuran and γ-butyrolactone from the product of the hydrogenation of maleic acid, succinic acid, maleic anhydride, succinic anhydride and/or fumaric acid, by treating the crude hydrogenation pro... | 06/07/1994 |
| 5196602 | Two-stage maleic anhydride hydrogenation process for 1,4-butanediol synthesis Maleic anhydride is hydrogenated to produce 1,4-butanediol in a two-stage process. In the first stage maleic anhydride and/or maleic acid contacted with hydrogen at a temperature of about 100° C. to about 350° C. in the presence of a suitable hydrogenat... | 03/23/1993 |
| 5149836 | Process for the production of gamma butyrolactone THF in predetermined amounts This invention provides a vapor phase process for the production of gamma-butyrolactone and tetrahydrofuran in a predetermined ratio by the steps of: hydrogenating a vapor mixture of maleic anhydride and excess hydrogen over a first bed of a Cu-Zn-Al cata... | 09/22/1992 |
