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WO/1996/010008A1 |
Waste nylon 6 and/or nylon 6,6 are converted to adipic acid monomer by depolymerization with an aliphatic monocarboxylic acid to form alkylamides followed by oxidation of the alkylamides to adipic acid.
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WO/1996/003365A1 |
Method of recycling a cobalt-containing catalyst in a reaction involving the direct oxidation of cyclohexane into adipic acid using an oxygen-containing gas. The method is characterized in that the reaction mixture, obtained in a precedi...
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WO/1995/034525A1 |
An optically active 'alpha'-substituted carboxylic acid derivative represented by general formula (I) wherein R1 represents hydroxy, -C(=CH2)-COOR3 or -CH(CH3)-COOR3; R2 represents methyl or chloro; R3 represents hydrogen or C1-C6 alkyl;...
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WO/1995/023781A1 |
Cyclohexyladipates are formed in a staged reactor, e.g. a reactive distillation column. A mixture containing a major amount of benzene and a minor amount of cyclohexene is fed to the lower portion of the reaction zone and adipic acid is ...
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WO/1995/023201A1 |
The invention concerns the use of fatty-acid amide alkyleneaminocarboxylic acids of the general formula (I), or water-soluble salts thereof, in aqueous lubricant solutions for conveyor lines in filling plants for foods and/or drinks, as ...
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WO/1995/021145A2 |
Provided is a method for producing long chain 'alpha','omega'-dicarboxylic acids by fermentation from long chain alkanes and recovering the produced dicarboxylic acids. Also provided is a novel microorganism useful for carrying out the m...
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WO/1995/020541A1 |
A process for the conversion of N2O to NO by heating a gas stream containing N2O by contact with a heated heat exchange surface to a temperature of about 400 to 700 degrees C, and then heating the gas to a temperature of about 850 degree...
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WO/1995/019949A1 |
A water soluble derivative of buckministerfullerene (C60) having antiviral and virucidal properties is used to inhibit human retroviral replication and infections. The derivatized fullerene is symmetrically substituted with polar organic...
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WO/1995/018783A1 |
Process for the preparation of a linear 'omega'-formyl-carboxylic acid or a corresponding linear formyl-nitrile compound starting from an internally unsaturated C4-C12 carboxylic acid or a corresponding ester or nitrile by means of hydro...
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WO/1995/017963A1 |
Process for producing an iridium solution, characterized in that a carbonylated iridium compound is contacted, in liquid phase, with hydriodic acid or its precursor in the presence of a solvent, at a global pressure of 1 to 5 bars and at...
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WO/1995/009830A1 |
Method for the preparation of mono or di_2-substituted cyclopentanone characterized in that it consists in performing in sequence four stages (a) to (d) which can be successively carried out, if desired, in the same reactor: (a) addition...
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WO/1995/004026A1 |
Compounds of general formula (I) characterised in that R1 and R2 are independently selected from the group consisting of COOR, CN, aryl, substituted aryl, COOH, halogen, C(O)NHR4, C(O)NR5R6; X and Y are independently selected from the gr...
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WO/1995/004109A1 |
Aqueous dispersions which are particularly well suited for use as aqueous ink jet ink compositions having an aqueous carrier medium which comprises water or a mixture of water and at least one organic solvent; a particulate solid, prefer...
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WO/1994/029413A1 |
Ashless dispersants are formed using copolymers of propylene characterized in that they are liquid substantially linear polymers, they have stereo-irregularity in the polymer chain, at least 60 mol percent of the polymer has a terminal v...
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WO/1994/024102A1 |
Waste nylon 6 and/or nylon 6,6 are treated with aliphatic monocarboxylic acid to depolymerize the polymer to desirable monomer.
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WO/1994/024083A1 |
A process for producing adipic acid from cyclohexene oxide in an industrially advantageous manner, which comprises hydrating cyclohexene oxide into a mixture of 1,2-dihydroxycyclohexane with an oligomer represented by formula (1), and ox...
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WO/1994/021586A1 |
A method for isomerising carboxylic acids and particularly branched acids into the corresponding straight acids. In particular, the method is for isomerising at least one branched saturated carboxylic acid by heating it in the presence o...
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WO/1994/013616A1 |
Process for the treatment of a material comprising a polymer, especially a polyamide. The process consists in subjecting the polyamide to hydrolysis in the presence of a hydrolyzing nitrous grouping and transforming the hydrolyzed compou...
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WO/1994/010122A1 |
A process for the preparation of carboxylic acids and esters thereof, comprises the operation of mixing an unsaturated fatty acid or corresponding ester with an oxidative substance, in the presence of a catalyst belonging to the group co...
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WO/1994/008939A1 |
A method for hydroxycarbonylating pentenoic acids, wherein one or more pentenoic acids are hydroxycarbonylated into adipic acid with carbon monoxide and water in the presence of an iridium and/or rhodium based catalyst and at least one i...
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WO/1994/007833A1 |
The present invention relates to a process for the preparation of C5-C8 aliphatic dibasic acids through oxidation of corresponding saturated cycloaliphatic hydrocarbons by: (1) reacting, at a cycloaliphatic hydrocarbon conversion level o...
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WO/1994/006745A1 |
A method for making a valproic acid derivative comprising a functionalized spacer arm attached to a delta carbon atom of a valproic acid molecule is disclosed. The method proceeds by attaching a spacer arm joined to an inorganic moiety t...
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WO/1994/004269A1 |
An improvement in the oxidation catalyst used for the partial oxidation of n-butane and containing vanadium and phosphorus, zinc, lithium and molybdenum mixed oxides which comprises carrying out the crystallization step under static cond...
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WO/1994/002245A1 |
New titanium zeolite Beta catalysts which have been found to be useful as catalysts for the oxidation of organic compounds using organic hydroperoxides as oxidation catalysts. They are particularly useful as ring opening oxidation cataly...
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WO/1994/002128A1 |
Compounds of alpha,w dicarboxylic acids of formula (I) in which X and Y, which may be the same or different, are hydrogen, halogen, C1-C6-alkyl, C1-C6-alkoxy, hydroxy, cyano, carboxyl, C1-C6-alkoxycarbonyl or carbamoyl, R1 and R2, which ...
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WO/1994/000385A1 |
High temperature superconductors (e.g. Y-Ba-Cu-O) can be formed at commercial quantities with high phase purities by conducting the coprecipitation process at a constant pH. By selecting a precipitate (e.g. oxalates) which confers plasti...
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WO/1993/025514A1 |
Disclosed is a method for the simultaneous preparation of dicarboxylic acids and diamines from (a) polymers based on polyamides made by reacting dicarboxylic acids or derivatives thereof with diamines or (b) compounds containing essentia...
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WO/1993/025299A1 |
The invention concerns the electrochemical preparation of dicarboxylic acids by subjecting an aqueous solution containing essentially the alkali-metal salt of a dicarboxylic acid of the general formula (I): HOOC-(CH¿2?)¿n?-COOH, in whi...
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WO/1993/025513A1 |
Disclosed is a method for the simultaneous preparation of dicarboxylic acids and diamines from (a) polymers based on polyamides made by reacting dicarboxylic acids or derivatives thereof with diamines or (b) compounds containing essentia...
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WO/1993/012064A1 |
The method is carried out in a two-phase aqueous-organic system in which the organic phase contains the unsaturated fatty acid and/or the esters thereof and the aqueous phase contains hydrogen peroxide. The oxidative cleavage is carried ...
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WO/1993/012063A1 |
A process for the preparation of adipic acid from pentenoic compounds by hydrocarboxylation using an iridium catalyst, an iodide promoter, water, carbon monoxide and a carboxylic acid solvent.
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WO/1993/008122A1 |
Contrast agent for X-ray imaging, consisting of a halogenated, especially iodinated or brominated, derivative of boron, having characteristics necessary for its use in X-ray imaging. The contrast agent may be used for imaging a corporeal...
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WO/1993/005007A1 |
Zeolites, particularly X type zeolites, essentially irrespective of the cation they contain, are effective heterogeneous catalysts for the oxidative conversion of the products of reaction of organic molecules containing a -HC=CH- structu...
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WO/1992/017405A1 |
Hydrophobised double-layer hydroxide compounds may be produced if double-layer hydroxide compounds of general formula (I): [M?(II)��1-x?M?(III)��x?(OH)�2?] A�x? * n H�2?O, in which M?(II)� is a divalent metal cation, M?(I...
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WO/1992/015545A1 |
The invention concerns basic calcium aluminium hydroxide dicarboxylates of the following formula: Ca�x?Al�2?(OH)�2(x+3-y)?A�y? . m H�2?O, wherein x is a number between 2 and 12; (2x+5)/2 > y > 0; m is a number between 0 and 12;...
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WO/1992/014543A1 |
In accordance with the present invention there is provided a method of making a cascade polymer including the steps of alkylating the branches of a multi-branch core alkyne building block including multiple ether side chains and simultan...
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WO/1992/012955A1 |
Branched fatty substances may be produced by reacting maleic acid anhydride containing fatty acids having 16 to 24 carbon atoms and 1, 2, 3, 4 or 5 double bonds or its esters with alcohols 1 to 4 carbon atoms in the presence of at least ...
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WO/1992/009564A1 |
Compounds of formula (I) are described wherein R represents a -CONHOH, carboxyl (-CO2H) or esterified carboxyl group; R1 represents an optionally substituted alkyl, alkenyl, aryl, aralkyl, heteroaralkyl or heteroarylthioalkyl group; R2 r...
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WO/1992/009565A1 |
Compounds of formula (I) are described wherein R represents a -CONHOH, carboxyl (-CO2H) or esterified carboxyl group; R1 represents an optionally substituted alkyl, alkenyl, aryl, aralkyl, heteroaralkyl or heteroarylthioalkyl group; R2 r...
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WO/1992/001644A1 |
The process disclosed enables aluminium oxide fibres containing up to about 40 wt % of Sio2 to be produced by reacting aluminium hydroxide or aluminium oxide hydrate with oxalic acid in an aqueous medium, optionally in the presence of an...
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WO/1991/014672A1 |
A chiral catalyst is disclosed together with methods of using it for enantioselective syntheses. The chiral catalyst includes a nucleus with two metal atoms that has four bridging ligands oriented radially to the axis of the nucleus. Eac...
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WO/1991/011421A1 |
The invention describes basic calcium aluminium hydroxyde dicarboxylates of the general formula: Ca�x?Al�2?(OH)�2(x+2)?A. m H�2?O in which x = 2 - 8; m = 0 -12; and A is an aliphatic, aromatic or heteroaromatic dicarboxylic acid ...
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WO/1991/009025A2 |
Partially fluorinated compounds of specified formulas that are useful as chemical intermediates and monomers are disclosed. Partially fluorinated polymers prepared from one of these compounds are also disclosed. Fluoro-2,2-dimethyldioxol...
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WO/1991/004959A1 |
A process for preparing an oligomeric copolymer of an unsaturated acidic reactant and a high molecular weight olefin having a sufficient number of carbon atoms such that the resulting copolymer is soluble in lubricating oil and wherein a...
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WO/1991/001963A2 |
Sebacic acid and the pharmacologically acceptable derivatives thereof, such as the novel compounds sodium sebacate and potassium sebacate, the sebacic acid triglyceride and the sodium and potassium salts of the triglyceride are useful fo...
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WO/1990/004581A1 |
To prepare (+)-isocitric acid and its derivatives, maleic acid and/or fumaric acid and/or their derivatives are added to haloacetic acid and its derivatives at high temperature under the action of photomechanical energy and the halogen g...
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WO/1990/003359A1 |
Novel copolymers of unsaturated acidic reactants and high molecular weight olefins wherein at least 20 percent of the total high molecular weight olefin comprises the alkylvinylidene isomer are useful as dispersants in lubricating oils a...
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WO/1988/004650A1 |
Succinic acid is recovered from its mixture with other carboxilic acids by a process which comprises the steps of: (A) heating the mixture of carboxilic acids under conditions of temperature and pressure and for a time sufficient to dehy...
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WO/1988/002746A1 |
Medicaments containing known alpha-halogenated dicarboxylic acids of formula (I), whereby in general formula (I), Hal is fluorine, chlorine and bromine; R is hydrogen and Hal, and m is a number between 4 and 16; or new compounds of gener...
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WO/1987/005898A2 |
Method for retarding plant growth by applying to the plant an effective amount of a malonic acid derivative compound. This invention also relates to novel malonic acid derivative compounds and processes for the preparation thereof.
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