Patent · US Active

High performance positively charged composite membranes and their use in nanofiltration processes

US9120062B2 · kind B2 · utility

4Cited by

2References

21Claims

0Family size

Assignees

BASF SE
NATIONAL UNIVERSITY OF SINGAPORE · SG

Inventors

Martin Weber · Maikammer, DE
Christian Maletzko · Altrip, DE
Bernd Trotte · Hemsbach, DE
Peishan Zhong · Singapore, SG
Tai-Shung Chung · Singapore, SG

Key dates

Filing date	Apr 19, 2013
Grant date	Sep 1, 2015
Priority date	—
Expiry date	Apr 19, 2033

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2325/16
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention is directed to positively charged nanofiltration (NF) membranes comprising a substrate layer (S) based on a sulfonated polymer and a positively charged film layer (F) on top of said substrate, and to a method for their preparation. Furthermore, the present invention is directed to nanofiltration processes making use of said composite membrane.

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