Huels Aktiengesellschaft

Huls Aktiengesellschaft

Hans Bellut

Peter Bickert

Fritz Gude

A method of producing 2,6,6-trimethyl-2-cyclohexene-1,4-dione. Cu(II)acetylacetonate is used as a catalyst, with a suitable amount of pyridine, in the absence of solvents. The product may be used as an intermediate product for producing flavors and fragrances, or for producing vitamin E and vitamin A.

Method of producing 2,6,6-trimethyl-2-cyclohexane-1,4-dione

A process for preparing 3,5,5-trimethyl-4-hydroxy-2-cyclohexen-1-one, comprising:

Process for preparing 3,5,5,-trimethyl-4-hydroxy-2-cyclohexen-1-one

A method of manufacturing N-alkyl-N'-methyl-alkyleneureas, by reacting an alkyleneurea with formaldehyde to produce a hydroxymethyl-alkyleneurea, and further reacting said hydroxymethyl-alkyleneurea with formic acid to yield a N-alkyl-N'-methyl-alkyleneurea product, wherein the molar ratio of the N-alkyl-N'-hydroxymethyl-alkyleneureas or N,N'-(bis)hydroxymethyl-alkyleneureas is from 1-2 to 1-10, preferably 1-4 to 1-7.

Method of manufacturing N-alkyl-N'-methyl-alkyleneureas, particularly N,N'-

A process for the preparation of a dicyclopentenol ester of the formula: ##STR1## wherein R is a C.sub.1-12 alkyl group, a C.sub.6-12 aryl group or a C.sub.6-12 substituted aryl group is disclosed. In this process dicyclopentadiene is reacted with an organic carboxylic acid of the formula:

Process for the preparation of dicyclopentenol esters

A process for the production of beta-isophorone from alpha-isophorone, comprising the steps of:

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Duelmen, Germany

Hans Bellut