Neutralization of phosphoric acid activated carbon

Details Neutralization of phosphoric acid activated carbon Neutralization of phosphoric acid activated carbon

1977-12-05

1979-04-10

Douglas, Winston A.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

127 55, 252422, 252425, 252447, C01B 3112, B01J 2118

Patent

active

041487532

ABSTRACT:
Cellulosic carbon that has been activated by a phosphoric acid process, is acid neutralized by contacting the carbon with an aqueous suspension of an additive material comprising a metal oxide or hydroxide of aluminum, zinc, or one of the alkaline earth elements to bind residual acid on the carbon in the form of a substantially insoluble phosphate salt.

REFERENCES:
patent: 1778343 (1930-10-01), Urbain
patent: 1819165 (1931-08-01), Hass
patent: 1875795 (1932-09-01), Zurcher
patent: 1903834 (1933-04-01), Oberle
patent: 1968847 (1934-08-01), Morrell
patent: 2008148 (1935-07-01), Morrell
patent: 2198380 (1940-04-01), Ellis
patent: 2198393 (1940-04-01), Smit
patent: 2464902 (1949-03-01), Barton
patent: 3767592 (1973-10-01), Kwok et al.
patent: 3835064 (1974-09-01), Shimomiya et al.
patent: 3950267 (1976-04-01), Arakawa

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