Process for the filtration of zeolite suspensions

Details Process for the filtration of zeolite suspensions Process for the filtration of zeolite suspensions

1979-07-24

1981-04-07

Cintins, Ivars C.

Liquid purification or separation

Processes

Separating

423328, C01B 3328

Patent

active

042604958

ABSTRACT:
Zeolites are prepared by hydrothermal crystallization of alkaline aqueous synthesis mixtures. Normally the zeolites are filtered and washed with water until the filtrate shows a pH of about 9 to 12. Sometimes, especially if the resulting zeolite consists of very fine particles, the zeolite filter cake shows thixotropic properties.
If the filter cake is washed with diluted sodium hydroxide or only small amounts of water this thixotropy can be avoided.

REFERENCES:
patent: 2882243 (1959-04-01), Milton
patent: 2904412 (1959-09-01), McBride et al.
patent: 3374182 (1968-03-01), Young
patent: 3499530 (1970-03-01), McKay
patent: 4073867 (1978-02-01), Roebke et al.
Savitsky, A. C., Soap/Cosmetics/Chemical Specialties, vol. 53, No. 3 (Mar. 1977), pp. 29-31 & 64-66.
Zhdanov, S. P., "Chemical Aspects of Zeolite Crystallisation from Alkali Aluminosilicate Gels", Paper Presented at the School of Pharmacy (University of London), Apr. 4th-6th, 1967.

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