Process for preparing low soda pseudoboehmite gel

Details Process for preparing low soda pseudoboehmite gel Process for preparing low soda pseudoboehmite gel

1978-04-21

1979-06-05

Carter, Herbert T.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423630, 252317, C01F 714

Patent

active

041573820

ABSTRACT:
A low soda pseudoboehmite gel is provided by reacting a NaAlO.sub.2 solution with a NaHCO.sub.3 solution having a concentration of less than 75 grams/liter and preferably less than 50 grams/liter. The soda content of the resulting AlO(OH) gel can be further lowered by repeated washing and/or redispersing (repulping) in water and/or further neutralization with a carboxylic acid having 1 to 6 carbon atoms.

REFERENCES:
patent: 2247624 (1941-07-01), Wall
patent: 2943065 (1960-06-01), Braithwaite
patent: 3226191 (1965-12-01), Osment et al.
patent: 3268295 (1966-08-01), Armbrust et al.
patent: 3739062 (1973-06-01), Barsotti
patent: 3864461 (1975-02-01), Miller et al.
patent: 3879310 (1975-04-01), Rigge et al.

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