Process for the purification of monotertiarybutyl hydroquinone

Details Process for the purification of monotertiarybutyl hydroquinone Process for the purification of monotertiarybutyl hydroquinone

1990-12-05

1992-02-11

Lone, Werren B.

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

Organic compounds

Oxygen containing

568749, 568766, C07C 3784

Patent

active

050877712

ABSTRACT:
A process for producing food-grade tertiary-butyl hydroquinone from impure montertiary butyl hydroquinone is provided. Impure monotertiary butyl hydroquinone crystals are agitated at an elevated temperature while in contact with a non-polar solvent under conditions to extract the majority of the impurities followed by separating purified monotertiary butyl hydroquinone crystals from the solvent at a temperature above the crystallization point of the impurities.

REFERENCES:
patent: 2722556 (1952-03-01), Young et al.
patent: 4493719 (1985-01-01), Wintermantel et al.
patent: 4507244 (1985-03-01), von Rappard et al.
patent: 4720570 (1988-01-01), Boyle
patent: 4861919 (1989-08-01), Robbins et al.

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