Patent · US Expired

Purification of sulfuryl fluoride

US7014831B2 · kind B2 · utility

7Cited by

7References

8Claims

0Family size

Assignee

Solway Fluor und Derivate GmbH · DE

Inventors

Johannes Eicher · Garbsen, DE
Matthias Marek · Offenau, DE
Lore Hirsch · Bad Friedrichshall, DE

Key dates

Filing date	Aug 6, 2004
Grant date	Mar 21, 2006
Priority date	—
Expiry date	Aug 6, 2024

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/151
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Sulfuryl fluoride, which is useful as a fumigant, may be contaminated with sulfur dioxide and possibly other impurities such as sulfuryl chloride, depending on the way it is produced. According to the invention, sulfur dioxide and, if applicable, sulfuryl chloride fluoride are removed from a contaminated sulfuryl fluoride product by using aluminum oxide as an adsorbing agent. The method of the invention is highly advantageous because it eliminates the need to use activated carbon as an additional adsorbent.

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