Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1981-07-06
1983-07-12
Sutto, Anton H.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
C07C 5160
Patent
active
043930093
ABSTRACT:
Process for the preparation of pure aromatic dicarboxylic acid dichlorides which comprises reacting an aromatic dicarboxylic acid or an aromatic dicarboxylic acid mixture with phosgen in one stage and in the presence of an N--C.sub.1 --C.sub.6 -alkyl-pyrrolidine, -piperidine or -morpholine as a catalyst and optionally in a solvent or diluent.
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patent: 3318950 (1967-05-01), Christoph et al.
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patent: 3857841 (1974-12-01), Keil
patent: 4129594 (1978-05-01), Baker et al.
Csuros, Zoltan et al., Chemical Abstracts, vol. 76, (1972), #112,720k.
Bottenbruch Ludwig
Freitag Dieter
Wulff Claus
Bayer Aktiengesellschaft
Hendriksen L.
Sutto Anton H.
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