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7615671 Hydrogenation process for the preparation of 1,2-diols  
Disclosed is a process for the preparation of 1,2-glycols by hydrogenation of 1,2-dioxygenated organic compounds in the presence of a catalyst composition comprising a ruthenium compound, a...
7390869 Process for removing metal species in the presence of hydrogen and a porous material and polyester polymer containing reduced amounts of metal species  
A process for removing metal species from a composition comprising contacting: a. an oligomer mixture stream comprising the monomers of a partially aromatic polyester polymer and at least...
7138552 Method for producing C13-alcohol mixtures  
The present invention relates to a process for preparing a C 13 -alcohol mixture which is suitable, in particular, as precursor for the preparation of compounds having surfactant properties and of...
7084312 Catalyst and method for hydrogenating carbonyl compounds  
A process for the hydrogenation of an organic compound containing at least one carbonyl group comprises bringing the organic compound in the presence of hydrogen into contact with a shaped body...
7067615 Hydrotreating polyester precursors  
A process comprising contacting a liquid polyester stream with hydrogen in the presence of a hydrogenation catalyst comprising a metal supported on the surface of silicon carbide at a metal...
7060861 Method for hydrating poly-or monomethylol alkanals  
In a process for the catalytic hydrogenation of a polymethylolalkanal or a monomethylolalkanal of the formula (I) where R may be identical or different and are each a substituted or...
7022824 Method for the production of sorbit  
A process is described for preparing sorbitol by catalytic hydrogenation of a monosaccharide forming sorbitol on hydrogenation in the liquid phase, which comprises the catalyst being obtainable...
6995107 Raney catalyst, process for producing it and process for producing a sugar-alcohol using the same  
To obtain a Raney catalyst for fixed bed permitting a continuous use with a high initial activity and to produce a high purity sugar-alcohol at a low cost using the same. For this object,...
6982357 PROCESS FOR THE PREPARATION OF PROPANE-1,3-DIOL BY VAPOR PHASE HYDROGENATION OF 3-HYDROXYPROPANAL, BETA-PROPIOLACTONE, OLIGOMERS OF BETA-PROPIOLACTONE, ESTERS OF 3-HYDROXYPROPANOIC ACID OR MIXTURES THEREOF  
A process is described for the production of propane-1,3-diol. The process comprises subjecting a vaporous feed mixture comprising a hydrogen-containing gas and a feedstock selected from...
6919489 Process for a cyclohexanedimethanol using raney metal catalysts  
Disclosed is a process for a cyclohexanedimethanol by hydrogenation of a cyclohexane-dicarboxylate ester in the presence of a Raney metal catalyst doped with rhenium. The process is useful for the...
6900360 High-purity 1,3-butylen glycol, process for producing 1,3-butylene glycol, and process for producing by-product butanol and butyl acetate  
A method is provided for the preparation of high-purity 1,3-butylene glycol from acetaldehyde. In the method, acetaldehyde is condensed in the presence of base to form a mixture of acetaldols, and...
6900361 Process for lactose conversion to polyols  
A process for converting lactose into polyols that includes (a) hydrolyzing lactose to produce a hydrolyzate that includes at least one monosaccharide, (b) subsequently hydrogenating the...
6894160 Catalytic process for the modification of carbohydrates, alcohols, aldehydes or polyhydroxy compounds  
The invention relates to the industrial conversion of carbohydrates, alcohols, aldehydes or polyhydroxy compounds in aqueous phase. According to the invention a catalytic method is used for the...
6878852 Process for hydrogenation of carbonyl and iminocarbonyl compounds using ruthenium catalysts comprising tetradentate diimino-diphosphine ligands  
A process for the hydrogenation, using molecular hydrogen (H 2 ) of a catalytic system, wherein the catalytic system includes a base and a complex of formula (II):
6841085 Hydrogenolysis of 6-carbon sugars and other organic compounds  
Methods for hydrogenolysis are described which use a Re-containing multimetallic catalyst for hydrogenolysis of both C—O and C—C bonds. Methods and compositions for reactions of hydrogen over a...
6811604 Additives for mineral binders, based on a product of internal dehydration of a hydrogenated sugar, mineral binders with additives and method of preparing same  
The subject matter of the invention is a new additive for mineral binders comprising a composition containing at least one product of internal dehydration of a hydrogenated sugar which can...
6809224 Method for the separation of formaldehyde from a reaction mixture containing polyols by the addition of solvents before and/or during the distillation  
Formaldehyde is removed by distillation from reaction solutions containing a methlolated alkanal which was obtained from the reaction of formaldehyde with an alkanal which has at least one acidic...
6787677 Hydrogenation of carbonyl compounds  
In a process for the catalytic hydrogenation of a carbonyl compound or a mixture of two or more carbonyl compounds in the presence of catalyst tablets which comprise an inorganic, TiO 2 -containing...
6593502 Process for the preparation of polyols  
The invention relates to a process for the preparation of polyols having 3 or 4 hydroxyl groups, from an aldehyde and formaldehyde in the presence of water, followed by hydrogenation of the...
6586642 Color number improvement in polyhydric alcohols by hydrogenation  
A process for greatly improving the color index of polyhydric alcohols, especially trimethylolpropane, by hydrogenation comprises using, in the hydrogenation, an alcohol which has already been...
6570043 Converting sugars to sugar alcohols by aqueous phase catalytic hydrogenation  
The present invention provides a method of converting sugars to their corresponding sugar alcohols by catalytic hydrogenation in the aqueous phase. It has been found that surprisingly superior...
6486366 Method for producing alcohols by hydrogenation of carbonyl compounds  
A method for preparation of alcohols by catalytic hydrogenation of carbonyl compounds with hydrogen or hydrogen-containing gases in the presence of a hydrogenation catalyst of Raney type, where the...
6482972 Isomeric nonanols and decanols, their preparation, phthalic esters obtained therefrom and their use as plasticizers  
Mixtures of isomeric nonanols and decanols are obtained by joint aldol condensation of n-butanal and pentanals, and up to 1% by weight of 3-methylbutanal, hydrogenation of the aldol condensation...
6326519 Diallylic sulfides and processes for preparing the same  
Diallylic sulfides represented by Formula I ##STR1## wherein: R 1 and R 2 are independently chosen from the group consisting of --CHO, --CH 2 Cl, --CH 2 Br, --CH 2 I, --CH 2 OH, CH 2 OSO...
6297409 Continuous process for the preparation of a high-purity hydrogenated ose by catalytic hydrogenation  
The invention relates to a continuous process for the preparation of a high-purity hydrogenated ose by catalytic hydrogenation of the corresponding ose in falling film reactors, wherein the...
6291725 Catalysts and process for hydrogenolysis of sugar alcohols to polyols  
The present invention provides a process for preparation of low molecular weight polyols from high molecular weight polyols in a hydrogenolysis reaction under elevated temperature and hydrogen...
RE37329 Ruthenium-based catalyst for producing lower polyhydric alcohols  
A ruthenium-based hydrogenation catalyst, particularly but not exclusively for hydrogenolysis under pressure of higher polyhydric alcohols, comprises ruthenium supported on granular activated...
6274727 Method for producing shaped and unshaped polyol masses  
The invention relates to a composition, comprising one or more polyols, which has prolonged deformability and can be processed to give tablets, compacts or boiled sweets having improved properties.
6262318 Method of producing polyols from arabinoxylan-containing material  
The invention relates to a method of producing xylitol and erythritol from arabinoxylan-containing material. According to the invention, the arabinoxylan-containing material is hydrolyzed and...
6255541 Process for the preparation of polyvalent alcohols  
The invention relates to a process for the preparation of polyvalent alcohols by hydrogenation of an aldehyde. According to the invention said aldehyde is obtained by aldolisation reaction of an...
6235797 Ruthenium on rutile catalyst, catalytic system, and method for aqueous phase hydrogenations  
An essentially nickel- and rhenium-free catalyst is described comprising ruthenium on a titania support where the titania is greater than 75% rutile. A catalytic system containing a nickel-free...
6232512 Method for reducing the content of acetals or ketals in alcohol-containing reaction mixtures  
Reduction in the content of acetals or ketone acetals in a reaction mixture containing at least 10 moles alcohol per mole acetal or ketone acetal can be achieved hydrogenolytically when the...
6207865 Method for the hydrogenation of carbonyl compounds  
A carbonyl compound or a mixture of two or more carbonyl compounds is catalytically hydrogenated in the presence of a Raney copper catalyst in the form of nuggets.
6204378 Method for producing palatinitol  
A novel method for making palatinitol comprising a first step of epimerising isomaltose under conditions enabling a mixture of α-D-glucopyranosyl-(1➝6)-D-mannose and isomaltose to be achieved, a...
6177598 Preparation of sugar alcohols  
A process for the hydrogenation of a sugar or a mixture of two or more thereof comprises the following step: Bringing the sugar or the mixture of two or more thereof into contact with hydrogen...
6124443 Process for the hydrogenation of sugars  
Epimer-free sugar alcohols can be prepared from the corresponding sugars by catalytic hydrogenation with hydrogen in aqueous solution, the hydrogenation being carried out continuously at a hydrogen...
6020472 Process for preparing α-D-glucopyranosido-1,6-mannitol and-sorbitol from α-D-glucopyranosido-1,6-fruetose  
The sugar alcohols mentioned as title compounds can be prepared from the corresponding sugar in equimolar amounts by catalytic hydrogenation with hydrogen in aqueous solution, the hydrogenation...
5846794 Process for the preparation of D-arabitol  
A process for the preparation of D-arabitol, characterised in that it comprises the following stages: hydrolysis of a lactose solution, oxidation of the mixture of glucose and galactose thus...
5763690 Manufacture of trimethylolpropane  
Trimethylolpropane of high purity is efficiently made by mixing the aldol reaction product of formaldehyde and n-butyraldehyde with at least about 20 wt % of a lower alcohol prior to hydrogenation....
5739303 Method for decarbonylation of sugars  
The present invention discloses a method for direct decarbonylation of sugars. The method is based on the conversion of the sugars in the presence of a phosphine metal complex. These complexes are...
5714602 Process for the production of xylitol  
The present invention discloses a method of producing a pentitol from a hexaldonic acid. The hexaldonic acid is decarboxylated for example in the presence of sodium hypochlorite or hydrogen...
5644044 Process for the preparation of α-D-glucopyranosido-1,6-mannitol and -sorbitol from α-D-glucopyranosido-1, 6-fructose  
Sugar alcohols can be prepared from the corresponding sugars by catalytic hydrogenation in aqueous solution with hydrogen, the hydrogenation being carried out continuously at a hydrogen pressure of...
5600028 Method for producing lower polyhydric alcohols and a new ruthenium-based catalyst used in this method  
A ruthenium-based hydrogenation catalyst, particularly but not exclusively for hydrogenolysis under pressure of higher polyhydric alcohols, comprises ruthenium supported on granular activated...
5583215 Crystalline mixture solid containing maltitol and a process for preparing it  
The crystalline mixture solid containing maltitol of the present invention has a crushed and relatively tight crystal structure which can be observed at 1,000 magnifications by a scanning electron...
5561217 Preparation of polyether glycols  
A process for the preparation of polyoxyalkylene glycols or polyoxyalkylene glycol copolymers from polyoxyalkylene glycol formates or the formates of polyoxyalkylene glycol copolymers comprises...
5347039 Process for the preparation of derivatives of 3,5-dihydroxypentanoic acid  
This invention is directed to a method for stereoselectively preparing a syn-dihydroxylated compound comprising reacting a 3-hydroxyket-1-one with a borohydride in the presence of titanium derivative.
5324870 Process for producing optically active 1-substituted-1,3-propanediols using ruthenium-phosphine complex as a catalyst  
A process for producing an optically active 1-substituted-1,3-propanediol is disclosed, comprising hydrogenating a 3-substituted-3-oxopropanol or 3-substituted-3-oxopropanal in the presence of a...
5306847 Manufacture of 1,2-propylene glycol  
A process for the manufacture of 1,2-propylene glycol, wherein dihydroxyacetone is hydrogenolytically converted to 1,2-propylene glycol in a single stage using a catalyst.
5254757 Preparation of 2,2-bis-hydroxymethyl-butanediol-(1,4)  
A process for the preparation of 2,2-bis-hydroxymethyl-butanediol-(1,4) of formula I ##STR1## wherein 4-hydroxybutyraldehyde of formula II ##STR2## and/or 2-hydroxytetrahydrofuran of formula III...
5254758 Hydrogenation process  
In a hydrogenation process, an organic feedstock, such as an unsaturated organic compound containing at least one unsaturated linkage selected from >CC<, >CO, --C.tbd.C--, and...
Matches 1 - 50 out of 161 1 2 3 4 >