Patent · US Active

Method of purifying organic diphosphite compounds

US9108988B2 · kind B2 · utility

0Cited by

14References

42Claims

0Family size

Assignee

BASF SE

Inventors

Ulrich Berens · Binzen, DE
Holger Ganz · Ludwigshafen, DE
Franz Niklaus Windlin · Heidelberg, DE
Walid Al-Akhdar · Oberwil, CH

Key dates

Filing date	Dec 31, 2012
Grant date	Aug 18, 2015
Priority date	—
Expiry date	Mar 5, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07F9/65746
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A method of purifying an organic diphosphite of general formula (I)The method comprises providing a crude organic diphosphite of general formula (I) that is at least partly dissolved in a first solvent (L1), wherein (L1) is selected from the group consisting of alkylbenzenes, aryl alkyl ethers, chlorobenzene, and mixtures thereof, and precipitating by admixing with a second solvent (L2) selected from the group consisting of linear C1-C4-alkanols, ethylene glycol di(C1-C4-alkyl) ethers, and mixtures thereof, and separating off the precipitated organic diphosphite from the solvents.

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