Process for production of 4,4'-thiobis phenols

Details Process for production of 4,4'-thiobis phenols Process for production of 4,4'-thiobis phenols

C - Chemistry, Metallurgy

07

C

C07C 323/21 (2006.01) C07C 319/14 (2006.01) C07C 319/24 (2006.01) C07C 323/20 (2006.01)

Patent

CA 2129647

Thiobisphenols of formula (1) wherein X is 1, 2, 3 or 4 and R1 and R2 are straight or branch-chained alkyl group of 1 to carbon atoms, which are useful as antioxidants and synergists for antioxidants, are prepared by reaction of a 2,6-dialkylphenol with an excess of sulfur in a solvent comprising a mixture of an alcohol and water wherein the solvent contains from 10 to 50 wt.% of water.

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