Process for the purification of 2,6-diisopropyl phenol

Details Process for the purification of 2,6-diisopropyl phenol Process for the purification of 2,6-diisopropyl phenol

1992-04-30

1992-12-29

Lone, Werren B.

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

Organic compounds

Oxygen containing

568749, 568756, C07C 3906, C07C 3784

Patent

active

051753766

ABSTRACT:
The object of the invention is a new method for the purification of 2,6-diisopropyl phenol (propofol). The invention is characterized in that the raw product obtained from the alkylation of propene with phenol is crystallized at a temperature where propofol crystallizes but the isomers and other phenol derivatives formed in the reaction are still in liquid form, i.e. at a temperature of -25.degree. to +18.degree. C. especially at -20.degree. to -10.degree. C., without a solvent or using a suitable solvent, such as hexane or petrol ether.

REFERENCES:
patent: 2536040 (1951-01-01), Davidson
patent: 4391998 (1983-07-01), Wu
patent: 4433181 (1984-02-01), Holter

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