Inhibition of polymerization fouling during distillation of monomers in the presence of sulfur oxides
US4754058A · kind A · utility
5Cited by
5References
4Claims
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Key dates
| Filing date | Jun 2, 1987 |
| Grant date | Jun 28, 1988 |
| Priority date | — |
| Expiry date | Jun 2, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Polymer formation is inhibited during the distillation of ethyl acrylate and acrylic acid produced from the reaction of ethylene and acrylic acid with sulfuric acid. In the presence of sulfur dioxide formed during the reaction, nitrogen oxide (NO) is highly effective for inhibition of polymerization fouling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.