Patent · US Active

Method for the preparation of high purity stannous oxide

US8277774B2 · kind B2 · utility

12Cited by

5References

12Claims

0Family size

Assignee

HONEYWELL INTERNATIONAL INC. · US

Inventors

Christian Werner · Hannover, DE
Christoph Steinberg · Garbsen, DE
Jessica Maurer · Wunstorf, DE
Harry Zumaque · Cologne, DE

Key dates

Filing date	Jan 26, 2012
Grant date	Oct 2, 2012
Priority date	—
Expiry date	Jan 26, 2032

Classification

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

Abstract

Provided herein are methods for the preparation of high purity stannous oxide comprising: (a) reacting a Sn salt with a C2-12 dicarboxylic acid in the aqueous phase to form a suspension comprising a Sn-dicarboxylate complex; (b) washing the Sn-dicarboxylate complex with water to obtain a wash solution comprising a washed Sn-dicarboxylate complex essentially free of the anion of the Sn salt; and (c) reacting the washed Sn-dicarboxylate complex with a base to form high purity SnO, wherein the high purity SnO has an alpha radiation count of less than about 0.002 cph/cm2.

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