Nikki-Universal Co., Ltd.

Hideyuki Yunoki

Koji Hara

Takashi Aihara

Yoshiki Nakano

Makoto Sakura

Eiki Iida

Norio Inoue

Disclosed is a porous sepiolite having an improved water-resistance and thermal shock resistance obtained by grinding, moisture-conditioning and molding sepiolite, and then calcining said molded sepiolite at a temperature in the range of about 650.degree. C. to about 800.degree. C. Also disclosed is a porous sepiolite having a large specific surface area, wherein the pores having a pore diameter of 50 angstroms or less have a specific surface area in the range of from 40 to 200 m.sup.2 /g and in which no less than 20% of the total surface of the sepiolite is occupied with the pores having a pore diameter of 50 angstroms or less and wherein the pore distribution curve of the sepiolite has a main peak at a pore diameter of no more than 50 angstroms. This sepiolite is obtained by grinding, moisture-conditioning and molding sepiolite, calcining the same at a temperature in the range of about 650.degree. to about 800.degree. C., and then subjecting said calcined sepiolite to an acid treatment.

Porous sepiolite, process for producing same and adsorptive

Production of water resisting, hard, porous metasepiolite

Growing community of inventors

Kanagawa, Japan

Hideyuki Yunoki