Patent · US Expired

Production of an isomeric mixture of secondary phosphines

US4351960A · kind A · utility

0Cited by

2References

4Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Georg Elsner · Hürth, DE
Hartfrid Vollmer
Gero Heymer · Lechenich, DE

Key dates

Filing date	Sep 24, 1980
Grant date	Sep 28, 1982
Priority date	—
Expiry date	Sep 24, 2000

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07F9/5018
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for making an isomeric mixture of secondary phosphines with the summation formula C.sub.20 H.sub.27 P. To this end, hydrogen phosphide is reacted with dicyclopentadiene in the presence of an agent yielding free radicals. More specifically, hydrogen phosphide and dicyclopentadiene are used in a molar ratio of 1 to at least 2 and the reaction is effected under a pressure of 5 to 90 bars. The mixture is used in the production of flotation aids and as an ingredient of catalytically active transition metal complexes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.