Purification of 3-hydroxy-propanal
US5986145A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1998 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Aug 21, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Cobalt or rhodium carbonyl compounds are removed from an aqueous solution of 3-hydroxypropanal by a process comprising the steps of: PA1 (a) contacting the 3-hydroxypropanal solution with oxygen under acidic conditions at a temperature within the range of about 5 to about 45.degree. C. to produce an oxidation product mixture comprising an aqueous solution of 3-hydroxypropanal, one or more water-soluble cobalt or rhodium species, and byproduct carbon monoxide; PA1 (b) removing byproduct carbon monoxide from the oxidation product mixture as it is generated; and PA1 (c) passing the oxidation product mixture in contact with an acidic ion exchange resin maintained at a temperature less than about 45.degree. C. and removing at least a portion of the soluble metal compounds from the oxidation product mixture. Such a process is useful in, for example, the manufacture of 1,3-propanediol from ethylene oxide via an intermediate 3-hydroxypropanal solution containing residual carbon dioxide and insoluble cobalt or rhodium catalyst compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.