Patent · US Expired

Process for defluorination of phosphoric acid

US4347228A · kind A · utility

2Cited by

5References

3Claims

0Family size

Assignees

UHDE GMBH · DE
Kali-Chemie Aktiengesellschaft · DE

Inventors

Friedrich Wolstein · Essen, DE
Gerhard Koch · Nagold, DE

Key dates

Filing date	Feb 23, 1981
Grant date	Aug 31, 1982
Priority date	—
Expiry date	Feb 23, 2001

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01B25/2343
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention relates to a process for the defluorination of phosphoric acid by the addition of active porous silica gel.

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