Process for sulfonating impure ortho alkylphenol

Details Process for sulfonating impure ortho alkylphenol Process for sulfonating impure ortho alkylphenol

1982-06-28

1984-03-27

Chan, Nicky

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

568703, 568711, C07C14344, C07C 7928

Patent

active

044393741

ABSTRACT:
The sulfonation of o-alkylphenols by reaction with sulfuric acid is improved to give higher conversion to disulfonated o-alkylphenol by adding a small amount of a polybasic carboxylic acid (e.g. oxalic acid) to the o-alkylphenol. The sulfonated product is converted to a dinitro-o-alkylphenol by reaction with nitric acid or salt thereof.

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patent: 2392859 (1946-01-01), Meuli
patent: 2672485 (1954-03-01), Menn et al.
patent: 2810767 (1957-10-01), Clarke et al.
patent: 3752858 (1973-08-01), Odenweller
patent: 3766254 (1973-10-01), Sharman et al.
patent: 3829470 (1974-08-01), Hannah

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