Barium oxide/cresylic acid catalyzed ethoxylation
US4210764A · kind A · utility
31Cited by
2References
10Claims
0Family size
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Key dates
| Filing date | May 4, 1979 |
| Grant date | Jul 1, 1980 |
| Priority date | — |
| Expiry date | May 4, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C41/03
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Cresylic acid (phenol or alkylated phenols) is used to promote barium oxide or hydroxide which is used as an ethoxylation catalyst for the reaction of ethylene oxide and alkanols of all classes. The reaction is carried out at temperatures of from about 150.degree. to about 200.degree. C. to yield the ethoxylated product. The product obtained has a very narrow high adduct distribution with low levels of by-products and unreacted free alcohols. Calcium and magnesium oxides show negligible catalytic effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.