Mitsui Petrochemical Industries, Ltd.

Toru Taguchi

Isao Hashimoto

Hirohiko Nambu

Hiroaki Nakagawa

Hiroshi Fukuhara

Hisaya Miki

Kenji Saeki

Sadao Yoshimoto

Yutaka Haneda

Tokinori Agoo

In a process for producing 2,6-dihydroxynaphthalene from 2,6-diisopropylnaphthalene, 2,6-diisopropylnaphthalene is oxidized in the presence of a specific proportion of a basic compound to hydroxylate or hydroperoxylate 2,6-diisopropylnaphthalene in a high conversion, and the resulting intermediate is then subjected to acid cleavage in the presence of hydrogen peroxide to produce 2,6-dihydroxynaphthalene in a high yield. The yield of 2,6-dihydroxynaphthalene increases by subjecting the reaction mixture containing the above intermediate to a purifying operation or dehydrating operation or adding acetone to it before it is submitted to the acid cleavage. 2,6-Dihydroxynaphthalene may be reacted with acetic anhydride to obtain 2,6-diacetoxynaphthalene.

Process for oxidizing 2,6-diisopropylnaphthalene

In the process for obtaining a concentrate of resorcin by acid-decomposing m-diisopropylbenzene hydroperoxide in an inert solvent in the presence of an acidic solid catalyst and distilling off acetone and the inert solvent from the resulting acid-decomposition reaction mixture, if water is added to this reaction mixture in an amount of 20 to 70% by weight based on resorcin and the reaction mixture is then subjected to distillation, resorcin can be obtained at a high recovery yield.

Process for recovery of resorcin

In a process for purification of crude resorcinol derived from an acid-cleavage product of m-diisopropylbenzene dihydroperoxide and containing impurities having higher boiling points than resorcinol is, the recrystallization of said crude resorcinol from a mixed solvent consisting of

Process for purification of crude resorcinol

Growing community of inventors

Ichihara, Japan

Toru Taguchi