Direct cooling crystallization
US4452621A · kind A · utility
8Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1982 |
| Grant date | Jun 5, 1984 |
| Priority date | — |
| Expiry date | Sep 27, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D9/0059
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A crystallization process is improved by employing direct contact cooling whereby a volatile liquid is vaporized to provide the cooling necessary to effect the crystallization. The effluent vapors of the volatile liquid may be liquified and recycled for reuse by manipulation of temperature and/or pressure. In one embodiment, durene is crystallized from a C.sub.10.sup.+ aromatics fraction using liquified n-butane as the coolant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.