Method and device thereof for improving selectivity of oxygenate conversion to low-carbon olefin
US12312287B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2020 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Dec 21, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2529/85
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Provided is a method for improving the selectivity of conversion of an oxygenate to low-carbon olefins. A regenerated catalyst from a regenerator enters a pre-hydrocarbon-pooling device where it comes into contact with an activation medium to undergo a pre-hydrocarbon-pooling reaction, forming “hydrocarbon pool” active species. The pre-hydrocarbon-pooled regenerated catalyst leaving the pre-hydrocarbon-pooling device enters a conversion reactor for recycling. By providing the pre-hydrocarbon-pooling device, and performing “pre-hydrocarbon-pooling” treatment on the regenerated catalyst, the regenerated catalyst is enabled to form “hydrocarbon pool” active species and carbon deposition before entering the conversion reactor. This improves the distribution of “hydrocarbon pool” active species and carbon deposition of the catalyst in the conversion reactor, thereby shortening or eliminating the “induction period” of the conversion reaction, and improving the catalytic activity and selectivity of the regenerated catalyst for a conversion of an oxygenate to low-carbon olefins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.