Process for the production of zeolite A

Details Process for the production of zeolite A Process for the production of zeolite A

1981-02-24

1982-07-13

Meros, Edward J.

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423328, C01B 3328

Patent

active

043394205

ABSTRACT:
Crystalline zeolite powder of Type A is employed as a phosphate substitute in washing agents. For this use, it is advantageous if the crystalline zeolite powder of Type A has a specific average particle diameter of 4.3 to 8.5.mu. as well as a specifically narrow particle size distribution. By a specific sequence in the addition of the reactants in the precipitation of zeolites A this requirement of the product is fulfilled. Thereby water is present in a receiver and there are simultaneously added sodium aluminate liquor and waterglass solution and subsequently after a long stirring phase there are added further sodium aluminate liquor and further waterglass solution. The maximum grit content of the zeolite powder of Type A obtained is 0.2%.

REFERENCES:
patent: 4041135 (1977-08-01), Williams et al.
patent: 4071377 (1978-01-01), Schwuger et al.
patent: 4073867 (1978-02-01), Roebke et al.
patent: 4248847 (1981-02-01), Derleth et al.
patent: 4303626 (1981-12-01), Strack et al.
patent: 4303627 (1981-12-01), Strack et al.
patent: 4303628 (1981-12-01), Strack et al.
patent: 4305916 (1981-12-01), Strack et al.

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