Alkoxylation process catalyzed by phosphate salts of the rare earth elements
US5057627A · kind A · utility
36Cited by
2References
45Claims
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Key dates
| Filing date | Feb 20, 1990 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Feb 20, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C41/03
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Alkylene oxide adducts of organic compounds having active hydrogen atoms are prepared by a process which comprises contacting and reacting an alkylene oxide reactant comprising one or more vicinal alkylene oxides with an active hydrogen containing reactant comprising one or more compounds having active hydrogen atoms in the presence of a catalytically effective amount of one or more of the phosphate salts of the rare earth elements. The product alkoxylates are known to be useful, for instance, as nonionic surfactants, wetting and emulsifying agents, solvents, and chemical intermediates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.