Preparation of 2,6-di-tert-butyl-4-alkylphenols

Details Preparation of 2,6-di-tert-butyl-4-alkylphenols Preparation of 2,6-di-tert-butyl-4-alkylphenols

1981-05-11

1983-04-19

Lone, Werren B.

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

Organic compounds

Oxygen containing

568793, C07C 3906, C07C 3711

Patent

active

043806775

ABSTRACT:
Alkylation of 4-alkylphenols with 2-methylpropene in the presence of a macroreticular cation exchange resin bearing sulfonic acid groups with an internal surface area greater than about 200 m.sup.2 /g and an average pore diameter less than about 120 Angstroms leads to the 2,6-dialkylated product in high yields. Using a resin with an internal surface area of from about 525 to about 575 m.sup.2 /g and an average pore diameter from about 40 to about 60 Angstroms, there can be prepared from 4-methylphenol the antioxidant 2,6-di-tert-butyl-4-methylphenol in a yield in excess of 90%.

REFERENCES:
patent: 2733274 (1956-01-01), Cowie
patent: 2802884 (1957-08-01), D'Alelio
patent: 3037052 (1962-05-01), Bortnick
patent: 4202199 (1980-05-01), Marger et al.
patent: 4236031 (1980-11-01), Dodd
patent: 4236032 (1980-11-01), Dodd
patent: 4236033 (1980-11-01), Alfs
Rohm and Haas Company, "Liquid Process Chemical" Dept., No. 159, Aug. 1978, Special Issue, Philadelphia, Pa., Amberlite Ion Exchange Resins.
Pitochelli, "Ion Exchange Catalysis and Matrix Effects, Fluid Process Chemicals", Rohm & Haas, Philadelphia.

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