Phase transfer catalyst for synthesis of pentaerythritol diphosphites
US8278490B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Jul 19, 2010 |
| Grant date | Oct 2, 2012 |
| Priority date | — |
| Expiry date | Jan 20, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/65746
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention pertains to a process for the preparation of pentaerythritol diphosphites via a one-pot, direct esterification of phosphorus trichloride with pentaerithritol, and either an alkylphenol or an arylalkylphenol which functions both as a reactant and as a solvent, with a phase transfer catalyst such as a quaternary ammonium salt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.