Synthesis of aliphatic aromatic phosphine oxides
US4990674A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Jun 14, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a method of making an aliphatic aromatic phosphine oxide by reacting an aliphatic aromatic phosphinic acid with a halogenating agent to produce a phosphoryl halide, reducing the phosphoryl halide to a phosphinous halide, hydrolyzing the phosphinous halide with water to produce a mixture of a phosphine and a phosphine oxide, determining how much phosphine is present in said mixture, and adding sufficient oxidizing agent to oxidize the phosphine in the mixture to the corresponding phosphine oxide. Octylphenyl phosphine oxide is preferred. The phosphine oxides are useful in making extractants for extracting actimides and lanthanides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.