Oxidation of polyoxypropylene glycols to acids and ketones
US4978785A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Dec 11, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/316
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Carboxylic acid derivatives and methyl ketone derivatives of polyoxypropylene glycols are prepared by the selective nitric acid oxidation of a polyoxypropylene glycol in the presence of an alkali metal nitrite. If the alkali metal nitrite is added to an aqueous solution of nitric acid and the polyoxypropylene glycol is thereafter added, carboxylic acid derivatives of the polyoxypropylene glycol are provided. If a mixture of an alkali metal nitrite and a polyoxypropylene glycol is added to an aqueous solution of nitric acid, a reaction product containing a predominant amount of methyl ketone derivatives of the polyoxypropylene glycol is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.