Chemische Werke Huls Aktiengesellschaft

Huels Aktiengesellschaft

Chemische Werke Huels Aktiengesellschaft

Starchem, Inc.

Peter Hofmann

Wolfgang H Muller

Harald Lueders

Frank Krause

Klaus Heidel

Hans Regner

Heimo Bieringer

Manfred K/o/ Ppner

Klaus-Dieter Dohm

Michael Z/o/ Lffel

Finely divided polysaccharide graft polymers having a high absorption capacity for urine and water are prepared by semi-continuous reverse-phase suspension polymerization, in which an aqueous solution of an unsaturated carboxylic acid and an initiator is metered continuously into a suspension of a polysaccharide in an organic solvent and the polymer obtained is subsequently partial dehydrated and the crosslinked.

Process for the preparation of finely divided, water-swellable

A process for manufacturing alkyloligoglycosides. Alkyloligoglycosides nand alkylglycosides having alkyl groups with 8 to 24 carbon atoms, which are of interest in home economics and in the cosmetics industry, can be manufactured by glycosidation and transglycosidation. Light-colored alkyloligoglycosides and alkylglycosides are manufactured from saccharides and alcohols by glycosidation and transglycosidation with the addition of salts of inorganic acids, or polybasic saturated carboxylic acids, and by bleaching of the final products with peroxides.

Process for manufacturing light-colored alkyloligogycosides and

A method of manufacturing alkyloligoglycosides. Alkyloligoglycosides and alkylglycosides having alkyl groups with 8 to 24 carbon atoms, which are of interest in home economics and in the cosmetics industry, can be manufactured by glycosidation and transglycosidation. Light-colored alkyloligoglycosides and alkylglycosides are manufactured from saccharides and alcohols by glycosidation and transglycosidation with the addition of polar polymeric complex-forming agents, and by bleaching of the final products with peroxides.

Method of manufacturing alkyloligoglycosides

A polyvinyl chloride is produced by suspension polymerization in the presence of two suspension agents, namely

Process for polymerizing vinyl chloride with polyglycosyl polyol esters

The catalytic cobalt compound used in the reaction of olefins with carbon monoxide and water or alkanols which employs an oxidizing treatment is reprocessed according to the present invention. This reprocessing includes in a first embodiment treating the cobaltic residue obtained as the distillation sump product with water and a carboxylic acid having 1 to 4 C atoms. The phases generated are separated and cobalt is recovered from the carboxylic acid/water phase in the form of the corresponding carboxylic acid salt. Where appropriate, the corresponding carboxylic acid salt is transformed into another carboxylic-acid salt. A second embodiment includes the steps of hydrogenating the cobalt containing residue obtained as the distillation sump product, separating the metallic cobalt which is obtained, reacting the metallic cobalt with an acid and where appropriate converting the cobalt salt so obtained into another cobalt salt.

Methods for reprocessing cobalt catalysts used in hydrocarboxylation

A process and apparatus for the continuous production of alkylesters of saturated aliphatic carboxylic acids by reacting olefins with carbon monoxide and alkanol in the presence of a catalyst consisting of a cobalt compound and a promoter selected from the group consisting of pyridine, non-ortho-substituted alkylpyridines and mixtures at elevated pressure and elevated temperature, the reaction based on olefins having at least 8 C atoms and being carried out in a reactor wherein the flow characteristic is adjusted so that tubular flow without back-mixing predominates, and wherein the raw materials are supplied in the desired ratios at the input side of the reactor.

Process for the continuous production of alkylesters of saturated

A process for producing aliphatic nitriles by reacting the corresponding carboxylic acids or carboxylic alkylesters with ammonia in the liquid phase and in the presence of a metal-containing catalyst, the reaction being carried out at a temperature between about 150.degree. and 290.degree. C. in the presence of iron or an iron compound as the catalyst.

Process for producing aliphatic nitriles

Alkylesters of saturated aliphatic carboxylic acids are prepared by reacting aliphatic monoolefins containing internal double bonds and having 6 to 20 carbon atoms with carbon monoxide and an alkanol having one hydroxyl function in the presence of a catalyst of a cobalt compound and a promoter where the promoter is pyridine, a non-ortho-substituted alkylpyridine or a mixture thereof. The monoolefins can possibly contain paraffins and the reaction is carried out with:

Process for preparing alkylesters of saturated aliphatic carboxylic acids

A process for reacting alpha-olefins having a single branch of the following general structure: ##STR1## where a,b and c are 7.ltoreq.a+b+c+4.ltoreq.40 and where a.noteq.b, a.noteq.c, a&lt;b, with carbon monoxide and water or alkanols in the presence of a catalytic system consisting of a cobalt compound and a promoter selected from the group pyridine, a non-ortho-substituted alkylpyridine or a mixture thereof at a pressure of at least 50 bars and at a temperature of 175.degree. to 230.degree. C. into an isomer mixture of carboxylic acids or carboxylic acid alkylesters which is more than 50% acids or esters formed by functionalizing carbon atoms C.sup.2 or C.sup.3 of the general formula where the reaction is carried out with a promoter to cobalt ratio of 2:1 to 15:1 (atoms of nitrogen to atoms of cobalt) and at olefin conversions exceeding 50%.

Process for alkoxycarbonylating alpha-olefins having a single branch

A process for producing predominantly linear aliphatic carboxylic acid esters by reacting olefins, carbon monoxide and alkanols at elevated pressures and elevated temperatures in the presence of a catalyst consisting of a cobalt compound and a promoter. The promoter is the possibly cobalt-free mixture of substances obtained when a reaction mixture that was prepared by reacting olefins, carbon monoxide and alkanol in the presence of a catalyst consisting of a cobalt compound and pyridine, a non-ortho-substituted alkylpyridine or mixtures at elevated pressure and elevated temperature is reprocessed. This mixture of substances has a higher boiling point than the esters formed as the reaction product and higher than the pyridine, non-ortho-substituted alkylpyridine or mixtures thereof used as the catalytic component.

Process for the production of predominantly linear aliphatic carboxylic

A process for preparing fatty acid esters by reacting olefins, alkanols and carbon monoxide in the presence of a compound of cobalt and a promoter consisting of pyridine, non-orthosubstituted alkylpyridines or mixtures thereof. The reaction output is at first treated with a gas containing oxygen in a non-damaging manner and then reprocessed in two distillation stages. The first distillation stage is operated at a higher pressure than the second. In the first distillation stage there is produced a distillate free of cobalt and a sump product containing all of the cobalt used as catalyst. In the second distillation stage the sump product of the first distillation stage is again distilled to produce another distillate free of cobalt and a cobalt concentrate as sump product. This cobalt concentrate is incorporated into pyridine, a non-orthosubstituted alkylpyridine or a mixture thereof to form a suspension. The suspension is then treated by a mixture of carbon monoxide and hydrogen at a temperature of 100.degree. to 250.degree. C. and a pressure at least 50 bars, and this treatment product is fed back into the fatty acid ester synthesis.

Preparation of fatty acid esters

A method for preparing carboxylic acid alkylester after products free of nitrogen containing compounds. These after products, free of nitrogen containing compounds, are prepared by: (1) reacting olefins with carbon monoxide and alkanols in the presence of a catalyst system consisting of a cobalt compound and pyridine, non-orthosubstituted alkylpyridines or a mixture of these pyridines at elevated pressures and elevated temperatures to produce carboxylic acid alkylesters containing nitrogenated compounds resulting from the pyridines; (2) hydrogenating the carboxylic acid alkylesters to produce after products which include alcohols; and (3) treating the after products with acid ion exchangers to remove the nitrogenated compounds.

Process for producing carboxylic acid alkylester after products

A process for the production of alkyl esters of saturated aliphatic carboxylic acids made by reacting olefins with carbon monoxide and alkanol in the presence of a catalyst consisting of a cobalt compound and a promoter selected from pyridine, a non-ortho-substituted alkylpyridine or mixtures thereof at elevated pressure and temperature and with feedback of unconverted input materials, the water contained in the reaction mixture being separated as much as possible during the reprocessing from the flows of substances slated for feedback.

Production of alkyl esters of saturated aliphatic carboxylic acids

A process for recovering and reactivating catalysts used in the reaction of olefins with carbon monoxide and alkanols. The catalysts consist of a cobalt compound and pyridine, a non-ortho-substituted alkylpyridine or a mixture thereof as the promoter. The reacted mixture contains fatty acid ester, unconverted alkanol, uncoverted olefin, catalyst and promoter and this reacted mixture is treated with oxygen or an oxygenated gas at a temperature of about 20.degree.-150.degree. C. to oxidize the cobalt compound. The oxidized mixture is then separated by distillation to remove unconverted alkanol and olefin, the promoter, the reaction products and the distillation residue obtained thereby is mixed with pyridine, a non-ortho-substituted alkylpyridine or a mixture thereof. The suspension so obtained is treated with a mixture of carbon monoxide and hydrogen at a temperature of 100.degree. to 250.degree. C. and at a pressure of at least 50 bars.

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Marl, Germany

Peter Hofmann