Sumitomo Chemical Company, Limited

Sumitomo Pharmaceuticals Company Limited

Akio Fukui

Kozo Tsuji

Masahiro Fujiwara

Akira Morii

Kazuo Kumagai

Masatomo Fukasawa

Shin Tanaka

Yasuaki Abe

Shozo Horikiri

Akira Tasaka

Eiichi Ichiki

Koichi Moriguchi

Kiyoshi Taya

A novel antibiotic of the formula: ##STR1## wherein R is a hydrogen atom or a methyl group and preparation of the antibiotic by cultivating Nocardia sp. SC-4710.

Antibiotics, and their production

A process for producing alumina fiber or alumina-silica fiber having excellent mechanical strength and heat resistance, comprising (i) spinning a solution of at least one polyaluminoxane or of a mixture of at least one polyaluminoxane and one or more kinds of silicon-containing compounds in an organic solvent, (ii) hydrolyzing the resulting precursor fiber, and then (iii) calcining the hydrolyzed fiber, said polyaluminoxane being one or more kinds of polymers or copolymers which mainly consist of the structural units of the formula: ##STR1## wherein the pendant groups Y are one or more kinds of groups selected from the group consisting of an alkyl, an alkoxy, an acyloxy, phenyl and phenoxy, and which may be partially a halogen or hydroxy.

Process for producing alumina fiber or alumina-silica fiber

Phenols such as phenol, o-cresol, m-cresol, p-cresol, xylenols, ethylphenol, propylphenol, and butylphenol are selectively methylated in ortho-position with methanol in the vapour phase at an elevated temperature, for example, 300.degree. to 500.degree.C, under a pressure of 0.5 to 20 atmospheres absolute at a space velocity of 100 to 2000 hr.sup..sup.-1 in the presence of a three-component catalyst consisting of cerium oxide, magnesium oxide and germanium oxide, or a four-component catalyst consisting of cerium oxide, magnesium oxide, germanium oxide and tin oxide.

Process for selective methylation of phenols

Growing community of inventors

Ashiya, Japan

Akio Fukui