Patent · US Expired

Process for the preparation of phosphonous acids

US4485052A · kind A · utility

10Cited by

5References

9Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Hans-Jerg Kleiner · Kronberg, DE
Hubert Neumaier

Key dates

Filing date	Nov 19, 1982
Grant date	Nov 27, 1984
Priority date	—
Expiry date	Nov 19, 2002

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07F9/48
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Phosphonous acids are obtained by hydrolysis of dichlorophosphanes with water at temperatures of about 60.degree. to about 100.degree. C., preferably of about 80.degree. to about 95.degree. C.

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