Separation of cyclic compounds with molecular sieve adsorbent
US4014949A · kind A · utility
18Cited by
14References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1973 |
| Grant date | Mar 29, 1977 |
| Priority date | — |
| Expiry date | Dec 19, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Selective adsorption of one cyclic compound from a fluid mixture with a structurally similar cyclic compound can be obtained with molecular sieves (crystalline aluminosilicate zeolites) which have been partially dehydrated at a temperature in the range of 80.degree.-300.degree.C. Preferably the Al/Si ratio in the zeolite framework is in the range of 0.2-0.65. For example, m-xylene can be separated from p-xylene by selective adsorption of the m-xylene on NaY zeolite which was partially dehydrated at 125.degree. C. and contains about 12 wt % water by ignition analysis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.