Inorganic phase separation membrane and application of thereof to oil-water separation

Abstract

The invention discloses an inorganic phase separation membrane and application of thereof to oil-water separation, belongs to a functional material technology and relates to the superhydrophilic and underwater super hydrophobic oil inorganic phase separation membrane which grows a molecular sieve coating on a porous base, and thus micro and nanometer scale, a composite surface and a mesh structure are formed. The membrane material can be used for separating various greases at high efficiency and high speed and low energy consumption under various serious water body environments; and the membrane can be used for a long time and is easy to regenerate. The inorganic phase separation membrane consists of the porous base and the molecular sieve coating grown on the porous base; the aperture size of the porous base is 20-200 micrometers; the thickness range of the molecular sieve coating is 3-50 micrometers; the mass ratio of the porous base to the molecular sieve coating is (100:1)-(5:1); the porous base is made of a stainless steel wire mesh, a copper mesh, an aluminum mesh or porous ceramic; and framework types of the molecular sieve are LTA, SOD, FAU, MEL, CHA, MFI , DDR, AFI, BEA or PHI.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a molecular sieve coating grown on a porous substrate, which has a micro-nano scale super-hydrophilic and underwater super-oleophobic inorganic phase separation membrane, which can be widely used for oil-water separation , remove the water in the oil. Background technique [0002] Crude oil extraction, phase separation process in industrial production, treatment of oily wastewater and frequent offshore oil spill accidents make oil-water separation technology widely concerned. At present, people have developed a variety of oil-water separation materials. Most of the materials developed in the past are based on the lipophilic and hydrophobic properties of materials, which can absorb oil from water. However, such materials are easily contaminated by oil and difficult to recycle, which greatly limits their applications. Recently, someone has developed a no...

AI Technical Summary

Problems solved by technology

However, the oil-water separation membranes that have been developed are limited by their own material properties, so it is difficult to apply in some harsh environments, such as strong acid environment, high ionic strength environment, microbial contamination environment and high temperature environment, etc.

However, in practical applications, the oil-water separation process often occurs under the above-mentioned environment

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