Process to remove dissolved AlCl3 from ionic liquid
US8541638B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Nov 26, 2008 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Jul 25, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed herein are processes in which precipitation permits removal of metal halides (e.g. AlCl3) from ionic liquids. After precipitation, the precipitated metal halides can be physically separated from the bulk ionic liquid. More effective precipitation can be achieved through cooling or the combination of cooling and the provision of metal halide seed crystals. The ionic liquids can be regenerated ionic liquid catalysts, which contain excess metal halides after regeneration. Upon removal of the excess metal halides, they can be reused in processes using ionic liquid catalysts, such as alkylation processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.