Use of a multidentate phosphite ligand in the catalytic synthesis of adiponitrile
US12331007B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 21, 2022 |
| Grant date | Jun 17, 2025 |
| Priority date | — |
| Expiry date | Jun 21, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A multidentate phosphite ligand is used in the catalytic synthesis of adiponitrile. The ligand is represented by the following general formula (I). The method of catalytic synthesis of adiponitrile comprises primary hydrocyanation, isomerization, and secondary hydrocyanation reactions, wherein the catalyst adopted each comprises a phosphite ligand-nickel complex composed of a nickel precursor and a multidentate phosphite ligand. The ligand molecule has a higher electron cloud density, and the phosphorus content capable of participating in coordination in the ligand molecule per unit mass is higher, so that the catalytic activity of the catalyst is improved, and the amount of the catalyst is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.