Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1979-01-23
1980-09-30
Konopka, P. E.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
210656, 252444, 423448, 423461, C01B 3102, C01B 3104, C01B 3108, B01J 2118
Patent
active
042254639
ABSTRACT:
A process for preparing porous carbon support materials comprises treating activated carbon or coke, having a particle size of about 5 to about 50 .mu.m, a specific surface area of about 10 to 1,000 m.sup.2 /g, a hardness of at least about 95% attrition resistance, with solvent or solvents, and then heat treating the activated carbon or coke at a temperature of about 2,400-3,000.degree. C. under an inert, gas atmosphere; said solvent or solvents affecting the mineral and organic impurities in the activated carbon or coke such that after said subsequent heat treatment, substantially all of said impurities are removed. A hard, mechanically stable, porous carbon support material consisting essentially of highly purified activated carbon, highly purified coke or a mixture thereof, said support material having a carbon content of at least 99%, a specific surface area of about 1 to about 5 m.sup.2 /g and a particle size of about 5 to about 50 .mu.m, may be prepared in this way.
REFERENCES:
patent: 2734800 (1956-02-01), Brooks
patent: 3869302 (1975-03-01), Shea et al.
patent: 4066699 (1978-01-01), Suggitt et al.
Gotz Heinz
Unger Klaus
Konopka P. E.
Merck Patent Gesellschaft mit beschrankter Haftung
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