Process for the separation of mixtures of aromatic hydrocarbons into single components
US4542254A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1983 |
| Grant date | Sep 17, 1985 |
| Priority date | — |
| Expiry date | May 3, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C7/13
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is provided a process for the separation of aromatic hydrocarbons mixtures into single components, in which the mixtures in vapor phase pass onto an adsorption bed formed by a potassium-exchanged Y zeolite, which is preventively saturated with desorbent vapors. According to the invention the desorbent used is isopropylbenzene in vapor phase. This facilitates the quick separation of the pure components, with the exception of the presence of desorbent. The process according to this invention is quicker in comparison to traditional ones. It requires the use of lower charges of desorbent and allows the separation of single pure components of the mixtures. It especially improves the paraxylene separation in higher concentrations with respect to the desorbent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.