Preparation of carboxylic chlorides

Details Preparation of carboxylic chlorides Preparation of carboxylic chlorides

1994-07-14

1995-07-04

Dees, Jose G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic halides

562856, C07C 5158, C07C 5102

Patent

active

054301866

ABSTRACT:
A process for the continuous manufacture of carboxylic chlorides (I) of the general formula R-COCl, in which R stands for a C-organic radical containing from 1 to 30 C atoms, by the reaction of a carboxylic acid (II) with a reaction product (III) of phosgene (IV) and an N,N-substituted formamide (V), in which compounds II and III are passed in parallel flow upwardly into a zone, filled with compound III, in a reactor (1), the reaction mixture is allowed to rise in predominantly laminar flow, such that phase separation occurs to give a top I-phase and a bottom phase III' mainly comprising compound III and formamide formed and compound I is removed from the top phase and also portions of the bottom phase III' are removed at the rate at which they are formed.

REFERENCES:
patent: 3184506 (1965-05-01), Parker et al.
patent: 5166427 (1992-11-01), Hohmann et al.

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