Process of producing isopropylnaphthols

Details Process of producing isopropylnaphthols Process of producing isopropylnaphthols

1989-11-22

1991-03-26

Lone, Werren B.

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

Organic compounds

Oxygen containing

568569, C07C 3708, C07C 3914

Patent

active

050031139

ABSTRACT:
In a process of producing isopropylnaphthols by oxidizing diisopropylnaphthalenes with molecular oxygen in a liquid phase to provide a reaction mixture which contains therein diisopropylnaphthalene monohydroperoxides and then acid decomposing the monohydroperoxides to isopropylnaphthols, the improvement comprising separating an organic layer from the reaction mixture, adding lower aliphatic alcohols of 1-4 carbons to the organic layer, crystallizing the diisopropylnaphthalenes while allowing the diisopropylnaphthalene monohydroperoxides to remain dissolved in the lower aliphatic alcohols, thereby to separate the monohydroperoxides from the diisopropylnaphthalenes.
A further improvement in the process comprises crystallizing the isopropylnaphthols from aromatic hydrocarbons of 6-12 carbons.

REFERENCES:
patent: 2771491 (1956-11-01), Conner, Jr.
patent: 4049720 (1977-09-01), Hosaka et al.
patent: 4503262 (1985-03-01), Cupton et al.
patent: 4906790 (1990-03-01), Ishiguro et al.

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