Chloromethylation process

Details Chloromethylation process Chloromethylation process

1983-07-05

1985-02-26

Bond, Robert T.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D33312

Patent

active

045019037

ABSTRACT:
The invention is a method of increasing the yield of chloromethylthiophene produced by the addition of concentrated aqueous formaldehyde solution to a mixture of thiophene and concentrated hydrochloric acid and passing in a rapid stream of gaseous hydrogen chloride. The improvement comprises increasing the rate of addition of the gaseous hydrogen chloride from about 0.6 moles per mole of thiophene per hour to about 1.5 moles per mole of thiophene per hour to increase product yield.

REFERENCES:
patent: 2527680 (1950-10-01), Kyrides et al.
patent: 3271465 (1966-09-01), Krewer et al.
patent: 3284518 (1966-11-01), Ayers et al.

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