Process for preparation of zeolite slurry excellent in static stability and dynamic stability
US4622166A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1984 |
| Grant date | Nov 11, 1986 |
| Priority date | — |
| Expiry date | Jul 5, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/1286
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a process for the preparation of a zeolite slurry being excellent in either the static stability or the dynamic stability and having a good flowability, which comprises neutralizing an aqueous cake or slurry containing water and zeolite in such a state that both are substantially inseparable from each other by filtration, with an inorganic or organic acid or an acid anydride or acidic salt thereof so that the pH value of the zeolite slurry at the time of completion of addition of said acid, acid anhydride or acidic salt is in the range of from 9.5 to 12 and the pH value of the zeolite slurry in the stationary state after addition of said acid, acid anhydride or acidic salt is in the range of from 11.3 to 12.7, adding a water-soluble or water-dispersible organic polymeric dispersant in an amount of at least 0.1% by weight based on the anhydrous zeolite to the neutralized zeolite slurry, and subjecting the resulting slurry to highly shearing stirring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.