Basf Aktiengesellschaft

Rudolf Schmidt

Gerd Kaibel

Kaspar Bott

Friedrich Sauer

Rainer Ohlinger

Hartmut Schoenmakers

Ulrich Block

Dieter Wolf

Willy Van Pee

Horst Brandtstaedter

Hans J Astheimer

Jaak Van Steen

Siegfried Krueger

Anhydrous or substantially anhydrous formic acid is obtained by hydrolysis of methyl formate, in a process wherein

Production of anhydrous or substantially anhydrous formic acid

A process for the manufacture of 4,4'-diphenylmethane diisocyanate and a mixture of diphenylmethane diisocyanate isomers containing a controllable amount of uretdione and hydrolizable chlorine which comprises feeding crude MDI to an evaporator, condensing a head fraction in two stages in the presence of an inert gas, feeding the first stage condensate to a distillation column, producing a mixture of diphenylmethane diisocyanate isomers as an overhead, producing 4,4'-diphenylmethane diisocyanate as a side draw, and condensing each of the overhead and side draw in two stages in the presence of an inert gas.

Process for the manufacture of 4,4'-diphenyl-methane diisocyanate and a

Growing community of inventors

Frankenthal, Germany

Rudolf Schmidt