Method for preparing large-sized titanium-silicalite molecular sieve and method for preparing cyclohexanone oxime using the molecular sieve
US8772194B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2012 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Apr 3, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C249/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides a method for preparing a large-sized titanium-silicalite molecular sieve, and a method for preparing cyclohexanone oxime using the large-sized titanium-silicalite molecular sieve. The method for preparing a large-sized titanium-silicalite molecular sieve includes preparing a mixture of a titanium source, a silicon source and a template agent; heating the mixture to form a gel mixture; mixing a colloidal silica with the gel mixture; heating the gel mixture mixed with the colloidal silica in a water bath; and calcining the gel mixture mixed with the colloidal silica. In the present invention, the average particle size of the large-sized titanium-silicalitem molecular sieve is more than 10 um, and the particle size distribution is centralized, so as to avoid the formation of titanium-oxygen-titanium bonding. The method for preparing cyclohexanone oxime using the large-sized titanium-silicalite molecular sieve results in high conversion rate, high selectivity and easy recovery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.