Method for preparing composite charged mosaic membrane via interfacial polymerization

A technology of interfacial polymerization and charged mosaic, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problem of backward nanofiltration membrane preparation technology of charged mosaic membrane, no industrial membrane modules, membrane production Harsh process conditions and other issues, to achieve good interception capacity, good permeability, and facilitate industrial production
CN101530748AInactive Publication Date: 2009-09-16ZHENGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHENGZHOU UNIV
Publication Date
2009-09-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the field of membrane technique and discloses a method for preparing composite charged mosaic membrane via interfacial polymerization, characterized in that an ultra-filtration membrane is used as a support body; a quite thin selection layer is compounded on the support body of the ultra-filtration membrane by optimizing an interfacial polymeric monomer and by means of the interfacial polymerization; a cation exchange group and an anion exchange group are introduced to the selection layer at the same time, so that the selection layer owns structures and characteristics of the mosaic membrane; and the composite charged mosaic membrane. In comparison with other methods for preparing composite membrane, the method has the advantages that: the type, number and interfacial polymerization condition of the interfacial polymeric monomer are controlled, so an anion exchange unit is perfectly matched with a cation exchange unit in the membrane; the selectivity of membrane is good; the membrane selection layer obtained via the interfacial polymerization is thin, and the membrane flux is relatively high; in addition, the preparation technology is simple. The membrane is capable of being used for separating low molecular weight organic matters from inorganic salts, particularly separating the low molecular weight organic matters from bivalent ions, such as Mg<2+> and SO4<2->.
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Description

technical field

[0001] The invention belongs to the field of membrane technology, in particular to a method for preparing a composite charged mosaic membrane by means of interfacial polymerization. Background technique

[0002] In modern industrial production such as biochemistry, pharmaceuticals, dyes, etc., the practical problem of separating and removing trace electrolytes from water-soluble organic matter is often encountered. At present, in order to realize the separation of organic matter and inorganic salts, nanofiltration is widely used in industrial applications. For example, "Dyes and Dyeing" (2007, 44:8-10) reported that the microfiltration pretreatment process and nanofiltration desalination process of reactive red dye. After microfiltration pretreatment, use DK2540 spiral-wound nanofiltration membrane with a membrane area of ​​1.77m 2 . At 2.5MPa, the permeate flux of nanofiltration concentration and desalination is 2.6-3.3L min -1 range, the solid content o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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