Olefin epoxidation catalyst, preparation method therefor, and application thereof
US11511260B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2018 |
| Grant date | Nov 29, 2022 |
| Priority date | — |
| Expiry date | Feb 1, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2229/32
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a preparation method for an olefin epoxidation catalyst, comprising: (1) preparing a titanium-silicon gel; (2) performing pore-enlarging treatment to the titanium-silicon gel by using organic amine or liquid ammonia, and drying, calcinating to obtain a titanium-silicon composite oxide; (3) optionally performing alcohol solution of organic alkali metal salt treatment; and (4) optionally performing gas-phase silanization treatment. The catalyst prepared by the method of the present invention has adjustable variability for pore size, so that the activity thereof for epoxidation reactions of the olefin molecules with different dynamic diameters is higher; the surface acidity of the catalyst can be reduced effectively through two-step modification to the catalyst, so that the catalyst has higher selectivity for epoxidation product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.