Granulation of sodium metasilicate

Details Granulation of sodium metasilicate Granulation of sodium metasilicate

1978-09-26

1981-03-03

Sever, Frank

Chemistry: physical processes

Physical processes

Agglomerating

423332, B01J 216, C01B 3332

Patent

active

042538491

ABSTRACT:
Sodium metasilicate is granulated by (i) establishing, in a first zone, a cloud of anhydrous sodium metasilicate powder; (ii) injecting into said cloud (i), and intimately contacting therewith, an atomized liquid phase which comprises a liquid formulation of a sodium silicate; (iii) said intimate contacting (ii) being conducted in an atmosphere of a drying gas, whereby crystallization of the anhydrous metasilicate and agglomeration of the thus coated particulates are effected, (iv) next subjecting the effluent cohered granules of said first zone to a state of agitation in a second discrete zone, in an atmosphere of a heating gas and whereby the agitated granules are at least partially converted to the sodium metasilicate pentahydrate; (v) and thence recovering from said second discrete zone a granular sodium metasilicate comprising from about 2 to 6% by weight water, and useful in the manufacture of a variety of detergent compositions.

REFERENCES:
patent: 3208822 (1965-09-01), Baker et al.
patent: 3227789 (1966-01-01), Tytus et al.
patent: 3340018 (1967-09-01), Otrhalek
patent: 3868227 (1975-02-01), Gericke et al.
patent: 3884645 (1975-05-01), Kinne
"The Spherodizer Granulation Process"; C.E.P.; vol. 60, No. 2; pp. 62-66; (Feb. 1973).

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