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WO/1999/015489A1 |
This invention relates to methods and devices for removing acetic acid from cyclohexane in the direct oxidation of cyclohexane to adipic acid, especially after recycling catalyst which is precipitaded by introduction of additional cycloh...
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WO/1999/014178A1 |
This invention relates to methods of recycling catalyst in oxidations of hydrocarbons, such as cyclohexane for example, to respective intermediate oxidation products, such as adipic acid for example, by a direct process. The catalyst rem...
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WO/1999/014179A1 |
This invention relates to methods and reactor devices for controlling the oxidation of hydrocarbons to intermediate oxidation products, such as adipic acid for example, by removing the catalyst from the reaction mixture, outside the reac...
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WO/1999/010527A2 |
The invention relates to a method for isolating anionic organic substances from aqueous systems using polymer nanoparticles with cationic pH-sensitive surface groups. Extraction can be carried out directly from diluted solutions, biologi...
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WO/1999/008988A1 |
A process for preparing malonic acid from the hydrolysis of cyanoacetic acid in the presence of aqueous hydrochloric acid, the process conditions being such that they allow high yields in malonic acid product. The product of said acid hy...
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WO/1999/005086A1 |
This invention relates to methods and devices of preparing acids, such as adipic acid for example, by oxidizing a hydrocarbon, such as cyclohexane for example, with a gas containing an oxidant, preferably oxygen. A respective hydrocarbon...
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WO/1999/000352A1 |
Dilute solutions of fermentation sales may be concentrated by extracting water using low-miscibility, low-molecular-weight secondary and tertiary amines, e.g. triethylamine (TEA), diisopropyl amine (DIA), N,N-diethylmethylamine (DEMA), a...
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WO/1998/054119A1 |
Water-soluble dodecandioates wherein the cationic moiety is selected from the group comprising the cations of basic aminoacids (e.g. lysine) and choline and orally or parenterally administrable compositions containing same, are disclosed.
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WO/1998/043946A1 |
Processes for preparing compounds of the formula (I) are described: P?1�OOC-CH(OH)-CHR?1�-CONH-Z wherein P?1� is hydrogen or a protecting group, Z is a group -CHR?2�COOP?2� or -CHR?2�CONR?3�R?4� wherein P?2� is hydrogen...
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WO/1998/039282A1 |
The invention provides a process for directly manufacturing a diamine/dicarboxylic acid salt with a low water content. The process includes reacting a diamine with a dicarboxylic acid to form a diamine/dicarboxylic acid salt. The reactio...
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WO/1998/035929A1 |
The invention relates to a method of producing dicarboxlic acid crystallizates from a solution containing at least one organic dicarboxylic acid, wherein at least one anionic polyelectrolyte with a molar mass of at least 2.000 is added t...
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WO/1998/035925A1 |
A process for producing a cleaved product from castor oil, or derrivatives thereof, by high temperature caustic oxidation reaction accomplished by combining at least one chemically inert diluent, a catalyst, and an alkali in aqueous solu...
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WO/1998/030530A1 |
The present invention relates to a novel class of compounds for treating hyperlipidemia, obesity and impaired glucose tolerance/noninsulin dependent diabetes mellitus without adversely affecting energy metabolism, and pharmaceutical comp...
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WO/1998/027029A1 |
Methods for oxidizing a hydrocarbon to an intermediate oxidation product by utilizing an activated initiator. The initiator is activated by partially oxidizing a first mixture of the initiator and a hydrocarbon, which mixture contains a ...
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WO/1998/026449A2 |
A method of making high purity acids and their derivatives, particularly citric acid and ammonium citrate. These purified compositions are useful in the manufacture of integrated circuits for the semiconductor industry. Purification is d...
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WO/1998/025882A1 |
Substantially anhydrous nylon salts are made in a solid state process in which solid diamine carbamates are contacted and mixed with solid dicarboxylic acids in a near instantaneous reaction to produce the salt, and preferably are prepar...
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WO/1998/020966A1 |
Methods and devices for controlling the oxidation of a hydrocarbon to an acid by regulating the temperature, hold-up time, and conversion in consecutive reaction zones. The temperature in the consecutive reaction zones progressively decr...
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WO/1998/019789A1 |
Methods and devices for controlling the oxidation rate of a hydrocarbon to an acid by adjusting addition of a rate-modulator are disclosed. In order to control oxidation rate, the ratio of hydrocarbon to rate-modulator is appropriately a...
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WO/1998/019987A1 |
This invention provides a process for the preparation of adipic acid from pentenoic acids or esters of pentenoic acids by hydrocarboxylation of a reaction mixture in which gamma-valerolactone constitutes 30 to 70 % by weight of the react...
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WO/1997/049485A1 |
Methods and devices for controlling the reaction of a hydrocarbon to an acid by making phase-related adjustments are disclosed. In order to improve reaction rate and reactivity of the oxidation, a single phase at the operating temperatur...
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WO/1997/047612A1 |
The invention relates to the field of chemistry and more particularly to that of therapeutic chemistry. The invention more precisely features novel 5-phenoxyalkyl 2,4-thiazolidinediketones of general formula (I): in which A represents on...
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WO/1997/047580A1 |
The invention discloses pentenoic acid hydroxycarbonylation into adipic acid. More particularly it concerns one pentenoic acid hydroxycarbonylation method involving reaction water and carbon monoxide, in presence of a catalyst comprising...
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WO/1997/047572A1 |
Optically active carboxylic acids, salts or esters, such as the profen-type compounds, are racemized in the presence by nitrogenous bases such as methylbenzyl-amine by heating an aqueous solution of such optically active compounds at a t...
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WO/1997/046509A1 |
The invention discloses a method for purifying adipic acid in water. More precisely it discloses an improvement in adipic acid crystallization or recrystallization in water, characterised in that the said crystallization or recrystalliza...
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WO/1997/046510A1 |
The invention discloses a method for purifying adipic acid by crystallization or recrystallization in at least one carbolyxic acid. More precisely, it discloses an improvement in adipic acid crystallization or recrystallization, characte...
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WO/1997/036673A1 |
A method for separating a catalyst from a solution containing same by membrane electrodialysis is disclosed. Specifically, the separation of a catalyst used in a homogeneous-phase molecular oxidation reaction is disclosed. According to t...
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WO/1997/028202A1 |
The disclosure relates to a method of producing press-moulding materials, in particular wood chip boards, by hot pressing of materials containing lignocellulose and mixed and/or impregnated with polyisocyanates as binders, using latent, ...
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WO/1997/027763A1 |
A physical mixture which consists essentially of compositions of lysine monohydrochloride and potassium chloride alone or admixed with small amounts of succinic acid in particular weight ratios which have a salty taste comparable to tabl...
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WO/1997/025452A1 |
Electrolytic hydrodimeric coupling of dialkyl maleates in alkanol solutions containing an alkanol-soluble alkali metal alkoxide/quaternary ammonium tetrafluoroborate mixed supporting electrolyte yields tetraalkyl 1,2,3,4-butanetetracarbo...
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WO/1997/013723A1 |
A solution process for the purification of calcium hydroxide, particularly from hydrated carbide lime, which is subsequently used as a feed stock for a high-value calcium product, preferably calcium carbonate. Precipitated calcium carbon...
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WO/1997/009296A1 |
Alkenyl-substituted dicarboxylic acid or anhydride ester derivatives, useful as dispersant additives in lubricating oil compositions, having an alkenyl group derived from an atactic propylene oligomer substantially of formula (I), where ...
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WO/1997/000846A1 |
Dicarboxylic acid and diamine are recovered from polyamides by hydrolysis with nitric acid, followed by separation of the dicarboxylic acid, and hydrogenation of the nitric acid, and then recovery of the diamine.
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WO/1996/040610A1 |
Methods and devices for making intermediate oxidation products by atomizing a first liquid containing a reactant into a gas containing an oxidant in a manner to form an intermediate oxidation product different than carbon monoxide and/or...
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WO/1996/039119A1 |
A completely solubilized topical composition of azelaic acid in a glycol base which is stable at normal temperatures and pressures and which is useful as a commercial substitute for dispersed azelaic acid preparations.
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WO/1996/037437A1 |
A process for preparing basic cobaltous carbonates having the general formula: Co[(OH)2]a[CO3]1-a is disclosed, as well as cobaltous carbonates and cobaltous oxalate carbonates obtained by this process and their use.
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WO/1996/035657A1 |
The present invention relates to a method for manufacture of products containing disalts of formic acid. Potassium hydroxide, carbonate, bicarbonate or formate, sodium hydroxide, carbonate, bicarbonate or formate, cesium hydroxide, carbo...
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WO/1996/031455A1 |
A method for oxidising liquid-phase hydrocarbons, alcohols or ketones in the presence of a heterogeneous catalyst. The method particularly enables the oxidation of a liquid-phase hydrocarbon, alcohol or ketone to carboxylic acid using mo...
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WO/1996/024557A1 |
The present invention concerns cobaltous oxide containing metallic cobalt, methods of producing the same and the use thereof.
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WO/1996/024556A1 |
The present invention concerns cobaltous oxide containing metallic cobalt, methods of producing the same and the use thereof.
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WO/1996/022963A1 |
A crystalline salt of lysine hydrochloride, succinic acid or alkali metal salt, wherein the molar ratio of lysine to succinic ion calculated as succinic acid is between about 3 and 10. The salt has the appearance of ordinary table salt c...
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WO/1996/022271A1 |
The present invention is a process for the scission and oxidation of ozonide materials. The process comprises introducing an oxygen-containing gas stream into an agitated liquid body in the form of fine bubbles.
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WO/1996/020909A1 |
A process for separating impurities from aqueous solutions of hexane diol-1,6 preliminary compounds like adipine and 6-hydroxy capronic acid, comprising the addition of at least one carboxylic acid to a solution (a) of hexane diol-1,6 an...
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WO/1996/020202A1 |
Optically active diphosphines and a method for preparing same by resolution of the racemic mixture of said diphosphines into optically active isomers, are disclosed. Novel optically active diphosphines of bis-[1-phospha-2,3-diphenyl-4,5-...
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WO/1996/019409A1 |
Carbonyl fluoride is produced by reacting fluorine-containing compound such as metal fluoride with CO in an excited state, such as produced by a plasma, to obtain a gaseous reaction mixture, which can then be quenched to obtain the COF2.
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WO/1996/018597A1 |
Crystallization of adipic acid using low intensity ultrasonic agitation during crystallization results in purer product that is more readily handled. Apparatus for carrying out the process is also disclosed.
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WO/1996/015096A1 |
Inhibitors for matrix metalloproteases, pharmaceutical compositions containing them, and a process for using them to treat a variety of physiological conditions. The compounds of the invention have the generalized formula (T)xA-B-D-E-G, ...
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WO/1996/014288A1 |
Copper and vanadium catalyst components are recovered and dialkyl esters of dicarboxylic acids are synthesized from an adipic acid synthesis waste stream by precipitating the catalyst metals with an alcohol selected from the group consis...
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WO/1996/011179A1 |
A method for preparing carboxylic acids including (n+1) carbon atoms, or the related esters, by liquid phase carbonylation of an alcohol including (n) carbon atoms, in the presence of a uniform catalytic system based on at least one irid...
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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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