Bayer Aktiengesellschaft

Manfred Giltjes

Paul Wagner

Winfried Joentgen

Torsten Groth

Dietrich Gehrmann

Thomas Bamberger

Molten maleic anhydride is introduced in the form of fine droplets at 53.degree. C. to 250.degree. C. and preferably at 60.degree. C. to 120.degree. C. into a gas atmosphere which consists either of pure gaseous ammonia or of a gas mixture of ammonia and at least one other gas and of which the temperature is between 20.degree. C. and 500.degree. C. The process is carried out at a temperature of 120.degree. C. to 180.degree. C. for the production of polysuccinimide and at a temperature of 10.degree. C. to 120.degree. C. for the production of maleic amide acid.

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Koln, Germany

Manfred Giltjes