Method of manufacturing alkylene oxide adducts of an aliphatic alcohol
US3932531A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1972 |
| Grant date | Jan 13, 1976 |
| Priority date | — |
| Expiry date | Jul 14, 1992 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/30
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An improvement is provided in the manufacture of alkylene oxide adducts of an aliphatic alcohol in which the reaction mixture, comprising the alkylene oxide adduct, unreacted alcohol, acid catalyst residue, carbonyl compounds and hydrocarbons, is treated to remove unreacted alcohol for recycle to the adduct formation step. To prevent the build-up in the system of carbonyl compounds and hydrocarbons which are not easily distillable from the recycle alcohol because of their respective boiling points, at least a portion of the recycle alcohol is esterified with boric acid, the esterification mixture is subjected to distillation to remove volatile portions, and the borate ester thus obtained is hydrolyzed to recover the alcohol which is recycled to the adduct formation step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.