The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 2024
Filed:
Aug. 16, 2022
Tiangong University, Tianjin, CN;
Zhejiang Jinmo Environmental Technology Co., Ltd, Zhejiang, CN;
Na Chang, Tianjin, CN;
Haitao Wang, Tianjin, CN;
Yinong Xu, Zhejiang, CN;
Donggen Chen, Zhejiang, CN;
Rui Liu, Zhejiang, CN;
Wei Shao, Tianjin, CN;
Zedong Li, Zhejiang, CN;
Yanjun Jia, Tianjin, CN;
Miaomiao Yin, Tianjin, CN;
Tiangong University, Tianjin, CN;
Zhejiang Jinmo Environmental Technology Co., Ltd, Zhejiang, CN;
Abstract
The invention relates to the field of industrial wastewater treatment, and particularly discloses a nanofiltration membrane for treating printing and dyeing wastewater and its preparation method. The preparation method comprises the following steps: S1, pouring an aqueous solution containing m-phenylenediamine, camphorsulfonic acid and triethylamine onto the surface of a polysulfone ultrafiltration membrane, setting still for 10 s to 30 s, and then removing the excess aqueous solution from the surface; S2, pouring an organic solution containing trimesoyl chloride and an interface auxiliary polymerization agent onto the surface of the membrane obtained in step S1, reacting for 5 s to 20 s, and then removing the excess solution from the surface; and S3, setting the membrane obtained in step S2 still and then carrying out heat treatment and water rinsing on the membrane in sequence, thus obtaining the nanofiltration membrane.