Binderless adsorbents and their use in the adsorptive separation of para-xylene
US7820869B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2008 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Oct 14, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2220/42
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Adsorbents and methods for the adsorptive separation of para-xylene from a mixture containing at least one other C8 aromatic hydrocarbon (e.g., a mixture of ortho-xylene, meta-xylene, para-xylene, and ethylbenzene) are described. Suitable binderless adsorbents (e.g., formulated with the substantial absence of an amorphous material that normally reduces selective pore volume), particularly those with a water content from about 3% to about 5.5% by weight, improve capacity and/or mass transfer. These properties are especially advantageous for improving productivity in low temperature, low cycle time adsorptive separation operations in a simulated moving bed mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.