Process for aromatics extraction from a 300.degree.-430.degree. F. boiling range naphtha
US4179362A · kind A · utility
6Cited by
5References
11Claims
0Family size
Inventors
Key dates
| Filing date | Jan 5, 1978 |
| Grant date | Dec 18, 1979 |
| Priority date | — |
| Expiry date | Jan 5, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G21/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Petroleum fractions may be separated into aromatic rich and paraffinic-rich hydrocarbon streams by the use of methanol/water mixtures having at least 10% water by volume. The paraffinic-rich stream is recovered as raffinate and the aromatic-rich as extract. After the extraction step additional water is added to the extract and raffinate streams where it acts as an anti-solvent to effect separation of the hydrocarbon from the solvent. The water and methanol are then separated for example by flash distillation or by using super critical CO.sub.2 as an extraction solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.