Dewatering process
US7338579B2 · kind B2 · utility
0Cited by
10References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 23, 2002 |
| Grant date | Mar 4, 2008 |
| Priority date | — |
| Expiry date | Dec 20, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A formaldehyde-containing product is separated from a formalin solution containing formaldehyde, water, and methanol by distilling in the presence of a water entraining compound, especially methyl propionate or methyl methacrylate. The product contains substantially less water than in the solution and may be used, for example, in a further process which requires a source of formaldehyde containing a relatively low level of water, for example, the catalyzed reaction of methy propionate with formaldehyde and methanol to produce methyl methacrylate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.