Patent · US Expired

Composite membrane and production method therefor

US6761755B2 · kind B2 · utility

22Cited by

30References

50Claims

0Family size

Assignee

W.C. Heraeus GmbH & Co. KG · DE

Inventors

Uwe Jantsch · Blaustein, DE
David Francis Lupton · Gelnhausen, DE
Thomas Giesel · Niederrodenbach, DE

Key dates

Filing date	Apr 7, 2003
Grant date	Jul 13, 2004
Priority date	—
Expiry date	Apr 7, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S55/05
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A composite membrane is provided having a flexible metallic substrate for separation of hydrogen from gas mixtures, which achieves a separation ratio of hydrogen to nitrogen of greater than about 4,000 at operating temperatures higher than 300° C. The composite membrane has a layer system arranged on at least one surface of the substrate, the layer system having a rigid, non-self-supporting, nonmetallic inorganic diffusion barrier layer adjacent the substrate, and at least one hydrogen-permeable, nonporous, metallic membrane on the side of the barrier facing away from the substrate. A method for production of such a composite membrane is also provided in which the diffusion barrier layer adjoining the membrane layer is formed by PVD, CVD, sol-gel process, or sintering-on powder particles, and the membrane layer is electrodeposited on the diffusion barrier layer.

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