Synthetic amorphous sodium aluminosilicate base exchange materials
US4213874A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1978 |
| Grant date | Jul 22, 1980 |
| Priority date | — |
| Expiry date | Jan 27, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/128
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for producing certain novel finely divided amorphous, precipitated alkali metal alumino silicates having a increased ion exchange properties is disclosed. The products of the invention are produced by commingling and precipitating, under certain controlled conditions, dilute aqueous solutions of an alkali metal silicate and alkali metal aluminate. Significant process variables include the chemical composition and concentration of the reactants, the precipitating temperatures and pH, the sequence and rate of the addition of the reactants and the mixing intensity during the precipitation. The amorphous products of the invention have base or ion exchange capacities equal and/or superior to known crystalline zeolitic base exchangers or absorbents and such may be used for water softening. Their use in detergents is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.