Process for the production of aluminum silicates
US4222995A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 15, 1976 |
| Grant date | Sep 16, 1980 |
| Priority date | — |
| Expiry date | Mar 15, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Alkali aluminum silicates, particularly a zeolitic molecular sieve powder with an average particle diameter of less than 10.mu. and having the portion of particles with a particle size above 45.mu. being less than 1 weight % are prepared by hydrothermal crystallization of an alkali aluminate-silicate mixture, separating the crystallization product from the mother liquor and drying with the proviso that the aqueous medium surrounding the crystallization product is adjusted to a pH value between 8.5 and 11 prior to the drying. The product is used as an ion exchanger, e.g., in dehardening water, particularly as a phosphate substitute in washing, rinsing and cleansing agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.