Degussa Aktiengesellschaft

Wolf D Pfeifer

Reinhard Manner

Hans Schaefer

Axel Kleemann

Paul Scherberich

Theodor Lussling

Carl Voigt

Carl Voight

There is obtained an increase in the throughput in the known BMA furnace or a BMA furnace chamber without changing the construction and dimensions already present by changing the lower part of the cooling head into a short tubular heat exchanger while maintaining the necessary temperature profile for the process by arranging the ceramic tubes in the furnace chamber in closer or less close fashion and/or by using ceramic tubes having different inner and outer geometries and/or structure.

Process & apparatus for the production of hydrogen cyanide

Process and apparatus for the production of hydrogen cyanide

5-Arylidene hydantoins are produced by condensation of an aromatic aldehyde with hydantoin in the presence of at least one ammonium salt of an aliphatic or aromatic carboxylic acid. The desired 5-arylidene hydantoins are obtained in high yields.

Process for the production of 5-arylidene hydantoins (B)

Growing community of inventors

Bruhl, Germany

Wolf D Pfeifer