Patent · US Active

Purifying organophosphorus compounds contaminated with chlorine

US9676805B2 · kind B2 · utility

21Cited by

16References

15Claims

0Family size

Assignee

EVONIK DEGUSSA GMBH · DE

Inventors

Katrin Marie Dyballa · Recklinghausen, DE
Robert Franke · Marl, DE
Dirk Fridag · Haltern am See, DE
Markus Priske · Mobile, US

Key dates

Filing date	Jan 16, 2015
Grant date	Jun 13, 2017
Priority date	—
Expiry date	Jan 16, 2035

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2531/22
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for the purification of a contaminated organophosphorus product which comprises at least one organophosphorus compound and, as contaminant, at least one chlorine compound. It is based on the object of indicating a purification method in which the chlorine content of an organophosphorus product which comprises at least one organophosphorus compound and at least one chlorine compound as contaminant, can be reduced from originally 1000 to 100 000 ppm to a total chlorine content between 10 ppm and 10 000 ppm. This is achieved by a process with the steps:

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