Patent · US Active

Method for the production of free flowing synthetic calcium fluoride and use thereof

US9764963B2 · kind B2 · utility

1Cited by

6References

13Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

Tilman C. Zipplies · Burghausen, DE
Klaus Hintzer · Woodbury, US
Thorsten Gerdes · Dortmund, DE
Achim Schmidt-Rodenkirchen · Bayreuth, DE
Sebastian Seidl · Neumarkt i.d.OPf., DE
Thomas Berger · Hirschau, DE

Key dates

Filing date	Apr 27, 2015
Grant date	Sep 19, 2017
Priority date	—
Expiry date	May 7, 2035

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01P2006/80
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention relates to a process for producing free-flowing calcium fluoride particles from a diluted aqueous solution of hydrogen fluoride comprising the step of reacting the diluted aqueous solution of hydrogen fluoride with calcium carbonate particles at a temperature of less than 50° C. The invention further relates to the use of the free-flowing calcium fluoride particles for the manufacturing of anhydrous hydrogen fluoride.

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