Title:
CONTROL OF DIAZOTIZATION
Document Type and Number:
Japanese Patent JPS57150651
Kind Code:
A
Abstract:
The disclosure relates to a process for controlling diazotization reactions. To this end, a reaction batch containing an aromatic amine and nitrous acid is vigorously agitated so as to continuously renew the surface area of the batch. The air above said surface area is exhausted at a constant rate and tested for its content of nitrous gases originating from partially decomposed nitrous acid. Nitrous acid or dissolved matter forming it under the reaction conditions is supplied to the feed amine in the proportions necessary to provide for a content between 5 and 300 ppm nitrous gases in the exhausted air.
Inventors:
KURUTO KARENBAUAA
HARUTOMUUTO BEERINGAA
HAINRITSUHI REEBERUKU
HARUTOMUUTO BEERINGAA
HAINRITSUHI REEBERUKU
Application Number:
JP1653382A
Publication Date:
September 17, 1982
Filing Date:
February 05, 1982
Export Citation:
Assignee:
HOECHST AG
International Classes:
C07C67/00; C07C245/20; C07C241/00; C09B41/00; G01N7/00; (IPC1-7): C07C113/04