Basf Aktiengesellschaft

Ludwig Vogel

Eckhard Hetzel

Hans-Martin Weitz

Juergen Hartig

Hans Christoph Horn

Waldemar Koehler

Gerhard W Rotermund

Helmuth Grube

Bernd Blumenberg

A process for separating toluene diisocyanate and/or higher boiling solvents from distillation residues obtained from the phosgenation of toluene diamine in the presence of solvents wherein the separation takes place in a fluidized bed at temperatures of 140.degree. C. to 280.degree. C.

Separating toluene diisocyanate and/or higher boiling solvents from

Diacetates of 1,2-glycols are manufactured by reacting acetic acid with an olefin and oxygen, using oxygen dissolved in the liquid phase of the reaction mixture and avoiding the presence of gaseous oxygen in the reaction space.

Manufacture of glycol acetate

Butenediol diacetate is manufactured by reaction of butadiene, oxygen and acetic acid over a palladium or platinum catalyst, only liquid, and no gases, being present in the reaction chamber.

Manufacture of butenediol diacetate

Tetrahydrofuran is prepared from a compound containing butanediol or capable of generating butanediol. The butanediol-donating compound is an ester of butanediol which is reacted with hydrolysis and etherification by passing it downwardly through a distillation column together with an acid catalyst and passing steam upwardly therethrough. The product which distills off is tetrahydrofuran.

Manufacture of tetrahydrofuran from the diacetate of 1,4-butanediol

Continuous manufacture of phthalimide by reaction of phthalic anhydride with ammonia and washing the offgas with a melt containing phthalimide. The product is a starting material for the manufacture of dyes, pesticides and pigments, especially copper phthalocyanines.

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Frankenthal, Germany

Ludwig Vogel