Huels Aktiengesellschaft

Degussa Aktiengesellschaft

Evonik Degussa Gmbh

Clemens Osterholt

Josef Metz

Manfred Neumann

Volker Brehme

Günther Köhler

Marcel Feld

Guenther Koehler

Udo Jegelka

Kerstin Bodmann

Thomas Kuebelbaeck

Thomas Kübelbäck

Juergen Lange

The invention relates to a process for preparing alkyl chlorides by reacting alcohols with gaseous hydrogen chloride in the presence of a catalyst, wherein the catalyst comprises at least one compound of the structure: wherein

Process for preparing alkyl chlorides

A process for preparing diols or triols made up of

Process for preparing alkanediols and alkanetriols having a vicinal diol group

A process for isolating purified 2-methoxypropene from a mixture which comprises 2,2-dimethoxypropane, 2-methoxypropene, methanol, acetone, and optionally other carbonyl group-containing compounds, which process involves subjecting the mixture to distillation, adding 2-aminoethanol and at least one base as assistants in the distillation, and isolating purified 2-methoxypropene.

Process for isolating highly pure 2-methoxypropene

Process for preparing monochlorinated hydrocarbons having a high isomeric purity

The invention relates to a process for the C-alkylation of dialkyl malonates, in which a dialkyl malonate is reacted with an alkyl halide in the presence of potassium carbonate as a hydrogen halide acceptor in an inert solvent, and a phase-transfer catalyst is not added until from 50 to 80% of the dialkyl malonate has reacted. The phase-transfer catalyst may be, for example, a tetraalkylammonium salt or a tetraalkylammonium hydroxide, a tetraalkylphosphonium salt or a tetraalkylphosphonium hydroxide or a crown ether.

Process for the C-alkylation of malonic esters using phase-transfer agents

The invention relates to a process for the preparation of a macrocyclic ester of the general formula: in which m is an integer from 6 to 14 and n is an integer from 2 to 12.

Process for the preparation of macrocyclic esters

A process for the preparation of cyclic esters of the general formula: ##STR1## in which m is an integer from 6-14 and n is an integer from 2-6, which comprises heating a dicarboxylic acid bis(glycol) ester of the general formula:

Process for the preparation of cyclic esters

A process for purifying at least 90% pure n-butyl chloride which is present in a mixture with other C.sub.1 to C.sub.4 alkyl chlorides, C.sub.1 to C.sub.4 alcohols, esters, ketones, nitrites, and organic sulfur compounds. In this process the mixture is first distilled, with high-boilers being separated off, and then washed in a plurality of stages with water and with dilute alkali metal hydroxide solution, and, optionally, an aqueous solution of H.sub.2 O.sub.2. In this manner, even a typical impurities may be separated off and a &gt;99% pure product may be obtained.

Process for purifying n-butyl chloride

In the continuous preparation of alkyl halides from branched olefins and hydrohalic acids, the reaction is carried out without the addition of catalysts and without solvents. With a high olefin conversion, alkyl halides are obtained with high selectivity and with very good color quality.

Process for the preparation of alkyl halides

In the preparation of alkyl halides from cycloaliphatic olefins and hydrohalic acids, the reaction is carried out at a temperature below the boiling point of the olefin without the addition of catalyst and without a solvent. At a high olefin conversion rate, alkyl halides are obtained with high selectivity and with very good color quality.

Process for preparing alkyl halides

The preparation of long-chain alkyl chlorides from alcohols and hydrogen chloride is improved by carrying out the reaction at a temperature below the boiling point of the alkyl chloride, and distilling off the resulting alkyl chloride by feeding in additional hydrochloric acid.

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Dorsten, Germany

Clemens Osterholt