Process for preparing or recovering acetals or ketals by means of pervaporation
US9309177B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Jun 29, 2012 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Jun 29, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2317/022
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The process of the present invention comprises reacting an aldehyde or ketone with an alcohol in the presence of a solid acid, and removing water and methanol from the reaction product by pervaporation, characterized in that a membrane having a flux density for water of 0.04 to 2.8 kg/(hm2) is used to remove the water and another membrane having a flux density for methanol of 2.0 to 100 kg/(hm2) is used to remove the methanol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.