Production of unsaturated acids or esters thereof
US7053147B2 · kind B2 · utility
5Cited by
7References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 17, 2003 |
| Grant date | May 30, 2006 |
| Priority date | — |
| Expiry date | Jul 26, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J35/651
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The production of ethylenically unsaturated acids or esters by the catalytic reaction of an alkanoic acid or ester, especially methyl propionate, with formaldehyde, and a catalyst therefor wherein the catalyst comprises a porous high surface area silica containing 1–10% by weight of an alkali metal, especially cesium (expressed as a metal) and having compounds of at least one modifier element selected from boron, magnesium, aluminium, zirconium and hafnium dispersed in the pores of said silica in such amount that the catalyst contains a total of 0.25 to 2 gram atoms of primary modifier element per 100 moles of silica.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.