Heterocyclic amine catalyst compositions for the alkoxylation of alcohols to glycol ethers
US8541629B2 · kind B2 · utility
0Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2009 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Feb 26, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C43/13
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Glycol ethers are made by a process in which an alcohol, an alkylene oxide and a catalytic amount of an aromatic, heterocyclic amine catalyst are contacted under reactive conditions. Representative catalysts include substituted and unsubstituted pyridines and imidazoles. The process uses known oxides and alcohols, and produces more mono- and di-adduct products than does a corresponding process using a caustic catalyst. Moreover, the process can be conducted at a lower reaction temperature than a corresponding process using a caustic catalyst without sacrificing oxide conversion rates yet producing fewer carbonyl impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.