Chemische Werke Huls Aktiengesellschaft

Chemische Werke Huels Aktiengesellschaft

Erhard Lange

Manfred Kaufhold

Werner Otte

Manfred Zur Hausen

Jorg Dorffel

Manfred Z Hausen

Friedrich Heinrich

A naphtha-soluble, hydrogenated C.sub.1-4 -alkyl C.sub.6-10 -aryl ketone/formaldehyde resin, having an oxygen content of at least 6% by weight and a softening point of at least 70.degree. C. can be produced by a process comprising the step of hydrogenating a C.sub.1-4 -alkyl C.sub.6-10 -aryl ketone/formaldehyde resin under a hydrogen pressure of at least 200 bar and a temperature of 140.degree.-300.degree. C., in the presence of a nickel, palladium, palladium/copper or palladium/nickel catalyst. These resins are useful, for example, as additives to improve the hardness of varnishes and other coatings.

Naphtha-soluble, hydrogenated alkyl aryl ketone/formaldehyde resins and

A continuous process for the preparation of butane-1,4-diol comprises, in a one-stage process, catalytically hydrogenating a solution of maleic anhydride in a monohydric aliphatic alcohol, in the presence of hydrogen and a copper chromite catalyst.

Process for the continuous preparation of butane-1,4-diol

In a process for the production of neopentyl glycol comprising high-pressure hydrogenating a crude hydroxypivalaldehyde, containing the monoisobutyric acid ester of neopentyl glycol as an impurity, in the liquid phase over a barium-activated copper chromite catalyst, an improvement comprises hydrogenating the crude hydroxypivalaldehyde in the presence of 3-8% of water, and in two stages, wherein, in the first stage, the temperature is 120.degree.-160.degree. C. and the charge of hydrogenation starting material is 0.05-1.0 liter/liter of catalyst . h., and in the second stage, the temperature is 170.degree.-200.degree. C. and the charge of hydrogenation starting material is 0.05-1.0 liter/liter of catalyst . h., whereby there is obtained neopentyl glycol having a degree of purity of above 98% as determined by gas chromatographic analysis.

Two stage hydrogenation to make neopentyl glycol

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Marl, Germany

Erhard Lange