Method for purifying spent acid
US7034193B2 · kind B2 · utility
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4References
20Claims
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Key dates
| Filing date | Apr 15, 2004 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Apr 24, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03D1/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for purifying a spent acid catalyst from an acid catalyzed chemical reaction that generates a mixture of a product, spent add and tar, includes the steps of separating the mixture of product, spent acid, and tar into a product fraction and a spent acid fraction, said spent acid fraction comprising a mixture of spent acid and tar, and separating the spent acid fraction, by flotation separation, centrifugation, or liquid-liquid coalescence, into a tar fraction and a de-tarred spent acid fraction. The fluidized tar and the de-tarred spent acid can each be further processed to produce concentrated acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.