Class 568/865 - Of ether

Subclass of Class 568 - Organic compounds -- part of the class 532-570 series
Definition: Processes wherein an ether is reduced.
No. of patents: 38
Last issue date: 07/14/2009

Number	Title	Issue Date
7560601	Method for producing 3-methyl-1,5-pentanediol Provided is a method for producing 3-methyl-1,5-pentanediol by hydrogenating 2-hydroxy-4-methyltetrahydropyran in the presence of a hydrogenation catalyst, characterized in that the hydrogenation is further carried out in the presence of a basic compound. By this me...	07/14/2009
7230145	Catalyst for producing both end-hydroxyl group-terminated diols, process for producing the catalyst, process for producing the diols by using the catalyst, and both end-hydroxyl group-terminated diols obtained by the process A process for producing a both end-hydroxyl group-terminated diol, wherein an epoxy alcohol represented by the general formula (1) is subjected to a hydrogenolysis reaction in the presence of a catalyst for producing both end-hydroxyl group terminated diols, which c...	06/12/2007
6750373	One-step production of 1, 3-propanediol from ethylene oxide and syngas with a cobalt-iron catalyst Disclosed is a new catalyst composition comprising a bimetallic Co—Fe catalyst, optionally complexed with a ligand selected from a N-heterocycle, phosphine, or porphorine ligand, that provides a lower cost alternative for the one step synthesis of 1,3-propanediol ...	06/15/2004
6586643	One-step production of 1,3-propanediol from ethylene oxide and syngas with a catalyst with a N-heterocyclic ligand Disclosed is a new catalyst composition comprising a bimetallic Co--Ru catalyst complexed with a N-heterocylcic ligand that is effective, economical, and provides improvements in oxidative stability in the one step synthesis of 1,3-propanediol (1,3-PDO) f...	07/01/2003
6555720	Method and system for producing 1,4-butanediol A method and system for producing 1,4-butanediol (1,4-BG), and optionally additionally tetrahydrofuran (THF), that promotes more efficient usage of water (H2 O) is provided. In one aspect, the method is comprised of supplying at least one feed ...	04/29/2003
6403845	Preparation of pentanediols from alkoxydihydropyrans ##STR1## are prepared by single-stage reaction of alkoxydihydropyrans of the formula (II) ##STR2## with water and hydrogen in the presence of a catalyst comprising oxides of nickel, zirconium and copper. In the formulae (I) and (II), R, R', R", R'" can be...	06/11/2002
6350714	Method for preparing a catalyst and catalysts prepared accordingly The present invention relates to a process for preparing a catalyst by activating a catalytic composition which comprises a) at least one metal of group IB or IIB or a compound thereof, b) where appropriate a carrier which comprises treating the composition with an...	02/26/2002
5981811	Process for preparing polyprenols A process for the preparation of a polyprenol represented by formula (1): ##STR1## where Y and Z individually represent a hydrogen atom or are coupled together to form a carbon-carbon bond; R represents a hydrogen atom or a protective group for a hyd...	11/09/1999
5952533	Method of producing 1,6-hexane diol from epoxybutadiene 1,6-Hexanediol is prepared by a) Reacting epoxybutadiene in the presence of a metathesis catalyst with elimination of ethene to give bisepoxyhexatrienes of the formulae Ia and Ib ##STR1## and b) hydrogenating these bisepoxyhexatrienes with hydrogen t...	09/14/1999
5945571	Preparation of 1,4-butanediol Described is a method of producing 1,4-butanediol, the method calling for 2,3-dihydrofuran to be decomposed in a single stage over a hydrogenation catalyst in the presence of water and hydrogen at a temperature of 20 to 300° C. and a pressure of 1 to 300...	08/31/1999
5905159	Method of producing 1,4-butanediol and tetrahydrofuran from furan 1,4-butanediol and THF are prepared from furan by a process which comprises converting furan in the presence of water and hydrogen but in the absence of a water-soluble acid in a single stage over a hydrogenation catalyst, the hydrogenation catalyst conta...	05/18/1999
5583270	Process for the preparation of 1,3-butylene glycol Disclosed are the improvements of a process for the preparation of 1,3-butylene glycol, in which the generation of by-products can be decreased, resulting in being capable of productiong 1,3-butylene glycol having high quality (e.g. an odorless, so-called...	12/10/1996
5508394	Citric esters of polyhydroxy compounds and use thereof in detergents Esters of citric acid or acetylcitric anhydride with compounds of at least 3 OH groups selected from the group consisting of polyglycerol, sugarcarboxylic acids, alkyl glucosides, derivatives of oligosaccharides, aminosorbitol, aminodisorbitol, glucosamin...	04/16/1996
5481048	Method for preparing copper-containing hydrogenation reaction catalyst and method for producing alcohol A copper-containing hydrogenation reaction catalyst is prepared by reducing a precursor of a copper-containing catalyst usable in hydrogenation reaction with hydrogen gas or a mixture of hydrogen and an inert gas by liquid phase reduction in a stream of a...	01/02/1996
5414138	Process for producing 2-formyl-1,4-butanediol A process for producing 2-formyl-1,4-butanediol comprises effecting reaction of 2-butene-1,4-diol with hydrogen and carbon monoxide in the presence of: (a) a rhodium compound, (b) a tris(substituted aryl) phosphite having an electronic parameter, .nu.-val...	05/09/1995
5395992	Synthesis of diols, for use as intermediates for polymeric materials, by starting from terminal diolefins Disclosed is the synthesis of terminal diols, which are organic intermediates used in order to produce polymeric materials, by starting from terminal diolefins, which synthesis is based on the oxidation of diolefins to yield diepoxides, in a double-phase ...	03/07/1995
5364987	Process for the preparation of 1,3-propanediol 1,3-propanediol (PD) is obtained by hydration of acrolein to 3-hydroxypropionaldehyde (HPA) with subsequent catalytic hydrogenation; 3,3'-oxybis-1-propanol (OD) occurs as a yield-reducing by-product. Disclosed is a process which increases the 1,3-propaned...	11/15/1994
5345004	Process for the preparation of 1,3-butylene glycol Disclosed are the improvements of a process for the preparation of 1,3-butylene glycol, in which the generation of by-products can be decreased, resulting in being capable of producing 1,3-butylene glycol having high quality (e.g. an odorless, so-called "...	09/06/1994
5243095	Hydrogenation catalyst, process for preparing and process for using said catalyst In one embodiment, the invention relates to a catalyst in powdered form comprising the oxides of copper, iron, aluminum and manganese wherein the atomic ratio of copper to iron is at least 1:1. In another embodiment, the invention relates to a process for...	09/07/1993
5210337	Formaldehyde resistant catalyst for hydrogenation and hydrogenolysis of aldehydes, acetals, and esters Rhenium has been found to be formaldehyde resistant catalyst and is thus useful in the catalytic hydrogenation of carbonyls, acetals and esters to alcohols when the reaction medium contains formaldehyde as a reactant or impurity. Also, rhenium is a useful...	05/11/1993
5103042	Method for reducing unsaturation of polyethers Polyethers having terminal allyl unsaturation are subject to hydrogenolysis by reaction with a hydrogen donor in the presence of a n-allyl complex forming catalyst. The product polyethers have extremely low levels of unsaturation, and thus are useful in p...	04/07/1992
5087775	Process for the preparation of partially fluorinated alcohols A process for the preparation of partially fluorinated alcohols starting from halogen-containing alkenes, and 2,2,3,3,4,4-hexafluorocyclopentanol as a new partially fluorinated alcohol....	02/11/1992
4873379	Process for making 1,3-diols from epoxides A process for manufacturing 1,3-glycols is disclosed. The process comprises reacting an epoxide with synthesis gas in the presence of rhodium in the presence of an alkali metal compound....	10/10/1989
4870208	Asymmetric hydrogenolysis of epoxides A process of preparing chiral alcohols by the asymmetric catalytic hydrogenolysis of epoxides using rhodium or ruthenium catalysts containing chiral phosphine ligands....	09/26/1989
4861922	Hydroformylation of 3-methyl-3-buten-1-ol and analogs thereof and use of such hydroformylation products There is disclosed a method of hydroformylating 3-methyl-3-buten-1-ol and analogs thereof with carbon monoxide and hydrogen in the presence of a rhodium compound free from modification by a ligand containing an element belonging to the group V of the peri...	08/29/1989
4859801	Synthesis of mixtures of butanediols Process for preparing 2-alkyl-1,4-butanediols and mixtures with 1,4-butanediol which comprises bringing together, at an initial alkaline pH, and at a temperature and pressure suitable for reaction, 2,3-dihydrofuran, hydrogen, an unsubstituted aliphatic al...	08/22/1989
4663468	Hydroformylation of 3-methyl-3-buten-1-ol and analogs thereof and use of such hydroformylation products There is disclosed a method of hydroformylating 3-methyl-3-buten-1-ol and analogs thereof with carbon monoxide and hydrogen in the presence of a rhodium compound free from modification by a ligand containing an element belonging to the group V of the peri...	05/05/1987
4476332	Preparation of alkanediols Disclosed is an improved process for producing alkanediols by the hydrolytic reduction of hydrolytically reducible furans. The improvement comprises utilizing a supported ruthenium catalyst, and trihaloacetic acid or a mixture thereof as a promoter for th...	10/09/1984
4475004	Preparation of alkanediols Disclosed is an improved process for producing alkanediols by the hydrolytic reduction of hydrolytically reducible furans. The improvement comprises utilizing a supported nickel catalyst, and trihaloacetic acid, preferably trifluoracetic acid or trichloro...	10/02/1984
4224248	Process for the depyrophorization of pyrophoric metal catalysts and uses thereof A process has been developed for the depyrophorization of pyrophoric metal catalysts, such as Raney nickel catalysts, which comprises treating said pyrophoric metal catalysts in water and/or an organic solvent with an organic nitro compound or a nitroso c...	09/23/1980
4160771	Synthesis of tetrahydrofuran This invention provides a process for producing tetrahydrofuran by the reaction of 3-(5'-alkyl-1',3'-dioxane)propionaldehyde and/or 3-(5'-alkyl-1',3'-dioxane)propanol and/or 4-hydroxybutanal with hydrogen in an aqueous medium having a pH between about 0.1...	07/10/1979
4146741	Conversion of furan to 1,4-butanediol and tetrahydrofuran Furan is hydrogenated in the presence of a nickel catalyst and a dicarboxylic acid having 4 to 10 carbons to produce 1,4-butanediol and tetrahydrofuran....	03/27/1979
4123444	2-Alkoxy-tetrahydrofurans via hydroformylation of allylic alcohols 2-Alkoxytetrahydrofurans are prepared by hydroformylation of an allylic alcohol in the presence of an alkanol and a rhodium hydroformylation catalyst. The products are useful, inter alia, as intermediates in the preparation of butanediols and substituted ...	10/31/1978
4101588	Production of bis-(dimethyl) acetals of hexane dialdehydes An improved process for the production of aliphatic or cycloaliphatic dialdehydes or acetals of the same by reaction of an aliphatic or cycloaliphatic conjugated diene with carbon monoxide and hydrogen in the presence of a rhodium catalyst which is modifi...	07/18/1978
4088700	Process for the hydrogenolysis of dioxolanes An improved process for the hydrogenolysis of acetals and ketals of organic hydrocarbons is described. The improvement resides in using a catalyst system including a halide of a Group III A element and a supported platinum or rhodium hydrogenation catalys...	05/09/1978
3975449	Hydrogenation of epoxides to primary alcohols A process for producing a primary diol and/or triol from an epoxide which comprises contacting the epoxide with hydrogen gas and a solid catalyst comprising nickel or cobalt at a temperature between 20° and 200°C. and at a pressure sufficient to maintai...	08/17/1976
3966827	Production of 3-methylpentane-1,5-diol The production of 3-methylpentane-1,5-diol by hydroformylation of 2-methylbut-1-en-4-ol with carbon monoxide and hydrogen at elevated temperature and superatmospheric pressure in the presence of a rhodium carbonyl complex which has been modified by a tert...	06/29/1976
3963754	2-Vinyl-5-methyl-1,3-dioxane 2-Vinyl-5-methyl-1,3-dioxane is provided as a new cyclic acetal which, when hydroformylated, hydrolyzed and hydrogenated provides high yields of a mixture of 1,4-butanediol and 2-methyl-1,3-propanediol....	06/15/1976

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Class 568/865 - Of ether