Preparation of dichlorophene

Details Preparation of dichlorophene Preparation of dichlorophene

1976-11-01

1978-11-28

Morgenstern, Norman

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

Organic compounds

Oxygen containing

C07C 3700, C07C 3720, C07C 3916

Patent

active

041277350

ABSTRACT:
An improvement in a process for the preparation of dichlorophene by reacting p-chlorophenol with formaldehyde in the presence of sulfuric acid. The improvement lies in contacting p-chlorophenol with the stoichiometric excess of formaldehyde in aqueous sulfuric acid by introducing into a sulfuric acid reaction medium 1 to 6% by weight of the total amount of p-chlorophenol to be reacted and thereafter adding the formaldehyde and additional p-chlorophenol to the reaction mixture in an amount such that at the end of the addition of the p-chlorophenol only 85 to 98% by weight of the total amount of formaldehyde has been added. The balance of the formaldehyde is then introduced into the reaction mixture.

REFERENCES:
patent: 2334408 (1943-11-01), Gump et al.
patent: 3057928 (1962-10-01), Koblitz et al.
patent: 3426081 (1969-02-01), Shore et al.

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