Production of water resisting, hard, porous metasepiolite

Details Production of water resisting, hard, porous metasepiolite Production of water resisting, hard, porous metasepiolite

1993-11-19

1995-03-14

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Pore-forming

501122, 501128, 423326, 423331, 264333, C04B 3800

Patent

active

053977521

ABSTRACT:
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.

REFERENCES:
Muronaka et al. "Hydrogenation of Pitch-Like Material" (Feb. 23, 1983) JP 57-198,788 (Japanese Patent Abstract).
Ono et al. "Catalyst Composition for Hydrogenating Heavyhydrocarbonic Oil" (Feb. 26, 1986) Japan JP 60-193,540 [Japanese Patent Abstract].
Fujitani et al. "Catalyst For Synthesizing Hydrocarbon" (Oct. 3, 1986) Japan JP 61-111,140 [Japanese Patent Abstract].
Umezawa et al. "Special Porous Composite" (Aug. 24, 1988) Japan JP 63-80846 (Japanese Patent Abstract).
Shiba et al. "Bituminous Vibration Damping Material which is applied by Coating for Automobile" JP 03-277674 (Japanese Patent Abstract) (Dec. 9, 1991).

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