Claims
- 1. Process for separating zeolite A crystals by filtration from a mother liquor obtained during a hydrothermal synthesis of zeolite A, which consists essentially of filtering the crystal slurry and washing the filter cake mainly consisting of zeolite A with an aqueous 0.05 to 2% by weight sodium hydroxide solution and removing the solid washed filter cake from the filter.
- 2. Process as claimed in claim 1, which comprises using as an aqueous washing solution a dilute sodium hydroxide solution having a content of NaOH of from 0.2 to 1.0% by weight.
- 3. Process as claimed in claim 1, in which at least 50% by weight of the particles of the zeolite A to be filtered are smaller than 4 .mu.m.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2719425 |
Apr 1977 |
DEX |
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Parent Case Info
This is a continuation of application Ser. No. 900,610, filed Apr. 27, 1978, now abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1038017 |
Sep 1958 |
DEX |
Non-Patent Literature Citations (2)
Entry |
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. |
Continuations (1)
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Number |
Date |
Country |
Parent |
900610 |
Apr 1978 |
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