Tosoh Corporation

Satoshi Fujii

Masao Nakano

Kiyotaka Oyama

Yukihiro Tsutsumi

Kazuhiko Sekizawa

Katsuo Komiya

Masashige Kubo

Fumio Okisaki

Koji Nakamura

A process for production of a partially hydrophilized absorbent is described, which comprises using, as a starting material, porous particles made of an organic compound having properties such that they are shrunk in a solvent containing water as a major component and swollen in a solvent containing an organic solvent as a major component; newly introducing functional groups to react with any one compound selected from the group consisting of compounds containing hydroxyl, amino, carboxyl, halogen or epoxy group in a solvent containing an organic solvent as a major component; and then reacting with a compound containing alcoholic OH group in a solvent containing water as a major component to immobilize the compound containing alcoholic OH group on the outer surfaces of the particles.

Process for production of partially hydrophilized porous adsorbents

A method for producing 4,4'-dibromobiphenyl, which comprises reacting biphenyl and from 2 to 3 mol times, relative to biphenyl, of bromine in a halogenated hydrocarbon solvent in the presence of a catalyst which is a simple substance of an element selected from the group consisting of antimony, titanium, tin and zinc, or a compound of the element.

Method for producing 4,4'-dibromobiphenyl

A p-substituted halobenzene derivative, which is very valuable in industry, can be obtained by halogenation of benzene and/or a benzene derivative in a liquid phase at a temperature of 0.degree. to 200.degree. C. at a higher selectivity and yield than in known processes, using, as a catalyst, an L type zeolite alkali-treated with an alkali solution of pH 11 or above at a temperature of 0.degree. to 100.degree. C. for 0.5 to 100 hours.

Producing a halogenated benzene derivative using zeolite catalyst

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Shinnanyo, Japan

Satoshi Fujii