Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic halides
Patent
1990-10-04
1991-07-09
Dees, Jose G.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic halides
C07C 5158
Patent
active
050307533
ABSTRACT:
In the conversion of trichloroethene and tetrachloroethene into dichloroacetyl chloride (DAC) or trichloroacetyl chloride (TAC) by means of oxygen, the reaction mixture is passed several times as a thin film through the reaction zone. The reaction time for achieving a certain conversion is in this way reduced.
In the preparation of DAC, a constant content of acid chloride is established in the reaction mixture by removing some of the mixture and working this up by distillation, while the circulating reaction mixture is simultaneously topped up with fresh trichloroethene.
REFERENCES:
patent: 2321823 (1943-06-01), Kirkbride
patent: 3654358 (1972-04-01), Jeffrey
Freyer Walter
Miltenberger Karlheinz
Schmidt Manfred
Dees Jos,e G.
Hoechst Aktiengesellschaft
Nazario-Gonzalez Porfirio
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