Patent · US Active

Preparation, regeneration and application of a chelating microfiltration membrane

US10870083B2 · kind B2 · utility

0Cited by

1References

8Claims

0Family size

Assignee

Nanjing University · CN

Inventors

Fuqiang Liu · State College, US
Yanhong Zhang · Shanghai, CN
Li Song · Beijing, CN
Wei Zhao · Zhuhai, CN
Changqing Zhu · Nanjing, CN
Chen Ling · Sunnyvale, US
Aimin Li · Nanjing, CN

Key dates

Filing date	Jun 15, 2017
Grant date	Dec 22, 2020
Priority date	—
Expiry date	Sep 16, 2038

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC02F2101/20
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A polyvinylidene fluoride (PVDF) casting membrane solution is shaped as a flat sheet membrane by thermally induced phase separation (TIPS), the PVDF membrane is defluorinated with an alkaline potassium permanganate solution, and then the carbon chain is extended with glycidyl methacrylate (GMA) as the graft monomer, and finally the nucleophilic substitution is carried out between melamine and GMA to produce a chelating microfiltration membrane for capturing and enriching heavy metals with high flux and high capacity.

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