US 11,596,906 B2 · UIO-66-NH2doped organosilicon high salinity wastewater treatment membrane and a preparation method thereof

Abstract

The invention belongs to the technical field of composite membrane, and in particular discloses a UIO-66-NH2 doped organosilicon high salinity wastewater treatment membrane and a preparation method thereof. The membrane is formed into UIO-66-NH2/organosilicon hybrid membrane on the prefabricated ceramic support surface through the dip-coating method by doping the UIO-66-NH2 metal-organic framework material into the organosilicon polymeric sol. The UIO-66-NH2/organosilicon hybrid membrane prepared by the present invention exhibits high water permeability (up to 1.6×10−10 m3/(m2 s Pa) and high salt retention (NaCl retention rate is more than 99.9. %) in the application of pervaporation desalination, and maintains stable membrane structure in the treatment process of TDS>5 wt % high salinity wastewater.

Claims9

Dependent claims

A method of preparing a UiO-66-NH2 doped organosilicon high salinity wastewater treatment membrane, the method comprising steps of:

(1) hydrolyzing and polymerizing a silicon source precursor and a hydrochloric acid catalyst with water in ethanol solution to obtain an organosilicon polymeric sol;
(2) adding UiO-66-NH2 crystal into the organosilicon polymeric sol by ultrasonic mixing and uniform dispersion to prepare a UiO-66-NH2/organosilicon hybrid sol;
(3) dip-coating the UiO-66-NH2/organosilicon hybrid sol on a ceramic support of a silica-zirconia nanometer transition layer;
and
(4) flash-burning the dip-coated UiO-66-NH2/organosilicon hybrid sol in air to obtain the UiO-66-NH2 doped organosilicon high salinity wastewater treatment membrane.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/165,966Filed 3 Feb 2021

Priority

CN 202010115058.625 Feb 2020

Published

US 2021/0260535 A126 Aug 2021

Granted

7 Mar 2023

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

B01D 71/70
Organic material: polymers having silicon in the main chain, with or without sulfur, nitrogen, oxygen or carbon only
B01D 67/0006
Organic membrane manufacture: by chemical reactions
B01D 67/0076
Inorganic membrane manufacture: pretreatment of inorganic membrane material prior to membrane formation, e.g. coating of metal powder
B01D 69/02
Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes…:…

UIO-66-NH2doped organosilicon high salinity wastewater treatment membrane and a preparation method thereof

Life of this patent

UIO-66-NH2doped organosilicon high salinity wastewater treatment membrane and a preparation method thereof

Life of this patent

Abstract

Claims9