Process for producing polyhalogenated phenols

Details Process for producing polyhalogenated phenols Process for producing polyhalogenated phenols

1975-03-05

1977-01-25

Thomas, Jr., James O.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 3930, C07C 3932

Patent

active

040051510

ABSTRACT:
A process for producing polyhalogenated phenol by mixing a polyhalogenated aniline with an aqueous sulfuric acid solution to obtain a suspension of fine particles of polyhalogenated aniline sulfate having the particle size of 50 .mu. or less, diazotizing the polyhalogenated aniline sulfate to obtain polyhalogenate benzenediazonium sulfate, hydrolyzing the resulting benzenediazonium sulfate by heating it as such, recycling to the diazotization step the aqueous sulfuric acid solution from which the desired polyhalogenated phenol has been separated.

REFERENCES:
patent: 1910679 (1933-05-01), Crawford et al.
patent: 2489423 (1949-09-01), Lawson et al.

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