Dewatering process
US6478929B1 · kind B1 · utility
7Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 22, 2001 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Jan 22, 2021 |
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 the solution 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 methyl propionate with formaldehyde and methanol to produce methyl methacrylate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.