Degussa Aktiengesellschaft

Huels Aktiengesellschaft

Evonik Degussa Gmbh

Günther Köhler

Clemens Osterholt

Manfred Neumann

Volker Brehme

Marcel Feld

Josef Metz

Marianne Omeis

Kerstin Bodmann

Peter Bickert

Manuela Imig

Karl-Heinz Brühl

Thomas Kübelbäck

An amine is prepared by cleaving a carbamate of the formula I  

Process for preparing amines

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

A salt-free process for preparing cyclobutanone, including isomerizing cyclopropylmethanol, preferably in aqueous solution, in the presence of an acidic heterogeneous catalyst to form cyclobutanol and, preferably after extraction and removal of the extractant, dehydrogenating the cyclobutanol over a heterogeneous catalyst.

Salt-free preparation of cyclobutanone

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 method is provided for the preparation of a pimelic ester of the formula: ##STR1## wherein R.sup.1 and R.sup.2 may be identical or different, and are linear or branched saturated alkyl substituents having from 1 to 10 carbons or araliphatic radicals having 7 to 10 carbon atoms; R.sup.3 is H or a hydrocarbon radical of one to six carbon atoms, and n is an integer of from 0 to 3; wherein the method entails: reacting a salt, formed from reaction of a 2-oxocyclohexanecarboxylic ester with a strong base, with an alcohol at a temperature of 50.degree.-250.degree. C., to cause ring opening.

Process for the preparation of pimelic esters

Alkylphenyl alkyl ethers or alkylphenyl alkyl thioethers, of the formula ##STR1## where U represents O or S; and R.sub.1 -R.sub.6 each independently represent an alkyl or aryl group with 1-6 C atoms, but R.sub.1 -R.sub.5 may each independently represent a functional group other than these, particularly --COOR (R=C.sub.1-4 alkyl), --NO.sub.2, --NH.sub.2, --O--CH.sub.2 --CH.sub.2 --OH, --OH, --CHO, --H, or -halogen;

Growing community of inventors

Marl, Germany

Günther Köhler