Patent · US Active

Composite polyamide membrane having preferred azo content

US9555378B2 · kind B2 · utility

3Cited by

76References

9Claims

0Family size

Assignee

DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

Abhishek Roy · Edina, US
Robert C. Cieslinski · Midland, US
Bruce B. Gerhart · Midland, US
David D. Hawn · Midland, US
Mou Paul · Edina, US
XiaoHua Qiu · Midland, US
Mark Rickard · Midland, US
Steven Rosenberg · Shorewood, US
Ian A. Tomlinson · Midland, US
Chengli Zu · Midland, US

Key dates

Filing date	Dec 15, 2014
Grant date	Jan 31, 2017
Priority date	—
Expiry date	Dec 15, 2034

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2323/40
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A thin film composite polyamide membrane comprising a porous support and a thin film polyamide layer characterized by possessing an azo (—N═N—) content of from 0.75% to 0.95%, as measured by pyrolysis gas chromatography.

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