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Preparing method of anti-corrosion millipore filter membrane

A microporous membrane, corrosion-type technology, applied in the field of membrane separation material preparation, can solve the problems of complex composition, strong corrosion, affecting the normal use of the microfiltration system, etc., to enhance adhesion, improve corrosion resistance, good The effect of chemical stability

Inactive Publication Date: 2018-02-23
谢新昇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention: for the current common microporous membrane, the liquid that needs to be microfiltered has complex components and diverse chemical properties, especially the wide use of acidic substances in industrial production, resulting in strong corrosiveness of the liquid. The process has a great impact on the destructiveness of the filter membrane, and also affects the normal use of the entire microfiltration system. A method for preparing a corrosion-resistant microporous filter membrane is provided.

Method used

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Examples

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example 1

[0023] Measure 10mL of butyl acrylate, 6mL of methyl methacrylate and 10mL of deionized water, mix them in a beaker and stir for 4min, then add 4g of stearyl polyoxyethylene ether and 3g of azobisisobutyronitrile. Stir under protection for 14 minutes, and heat up to 45°C to obtain a self-made acrylic resin emulsion. Mix and stir the self-made acrylic resin emulsion and polytetrafluoroethylene dispersion emulsion in equal volumes for 6 minutes to obtain a self-made mixed emulsion. Weigh 6g sodium chromate, 3g Potassium chromate, 2g of cerium nitrate and 1g of sulfonated lignin were mixed in a beaker with 80mL of deionized water and stirred for 10min to obtain a self-made anti-corrosion mixture. The mass ratio of polyvinyl alcohol resin and mass fraction of 55% ethanol solution is mixed and placed in a reaction kettle, heated to 45°C and stirred for 20 minutes to obtain a mixed solution, and then added to the mixed solution are paraffin wax of 0.3 times the mass of the mixed solu...

example 2

[0025]Measure 15mL of butyl acrylate, 7mL of methyl methacrylate and 11mL of deionized water, mix them in a beaker and stir for 5min, then add 5g of stearyl polyoxyethylene ether and 4g of azobisisobutyronitrile, Stir under protection for 16 minutes, and heat up to 55°C to obtain a self-made acrylic resin emulsion. Mix and stir the self-made acrylic resin emulsion and polytetrafluoroethylene dispersion emulsion in equal volumes for 7 minutes to obtain a self-made mixed emulsion. Weigh 7g sodium chromate, 4g Potassium chromate, 3g of cerium nitrate and 2g of sulfonated lignin were mixed in a beaker with 90mL of deionized water and stirred for 11min to obtain a self-made anticorrosion mixture. The mass ratio of polyvinyl alcohol resin and mass fraction of 55% ethanol solution is mixed and placed in a reaction kettle, heated to 50°C and stirred for 25 minutes to obtain a mixed solution, and then added to the mixed solution are paraffin wax 0.3 times the mass of the mixed solution ...

example 3

[0027] Measure 20mL of butyl acrylate, 8mL of methyl methacrylate and 12mL of deionized water, mix them in a beaker and stir for 6min, then add 6g of stearyl polyoxyethylene ether and 5g of azobisisobutyronitrile. Stir under protection for 18 minutes, and heat up to 65°C to obtain a self-made acrylic resin emulsion. Mix and stir the self-made acrylic resin emulsion and polytetrafluoroethylene dispersion emulsion in equal volumes for 8 minutes to obtain a self-made mixed emulsion. Weigh 8g sodium chromate, 5g Potassium chromate, 4g of cerium nitrate and 3g of sulfonated lignin were mixed in a beaker with 100mL of deionized water and stirred for 12min to obtain a self-made anticorrosion mixture. The mass ratio of polyvinyl alcohol resin and mass fraction of 55% ethanol solution is mixed and placed in a reaction kettle, heated to 55°C and stirred for 30 minutes to obtain a mixed solution, then add paraffin wax with a mass of 0.3 times the mass of the mixed solution and polyethylen...

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Abstract

The invention relates to the technical field of membrane separation materials preparation, in particular to a preparing method of an anti-corrosion millipore filter membrane. The preparing method includes the steps that self-made acrylic resin emulsion and polytetrafluoroethylene dispersed emulsion are compounded into mixed emulsion, due to corrosion resistance of acrylic resin, a tighter fluorineatom protective layer is formed outside a carbon chain skeleton by the helical conformation of polytetrafluoroethylene molecules, and the carbon chain skeleton is high in chemical stability and effectively resists corrosion of strong acid, strong base and multiple kinds of chemical products; polyvinyl alcohol resin, ethanol solution and paraffin are prepared into adhesive fluid under the heatingcondition, a rare earth element with corrosion resistance is added into filling to form an anti-corrosion protective layer, and the corrosion resistance of the millipore filter membrane is improved again; sodium chromate, potassium chromate, cerous nitrate and lignin sulfonate are mixed to form anti-corrosion mixed fluid mixed into the filling, the corrosion resistance of the millipore filter membrane is improved further, and the millipore filter membrane has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of membrane separation material preparation, in particular to a preparation method of an anti-corrosion microporous filter membrane. Background technique [0002] The microporous membrane is made of polymer chemical materials and pore-causing additives after special treatment and applied on the support layer. It is mainly made of refined nitrocellulose, adding appropriate amount of cellulose acetate, acetone, n-butanol, ethanol, etc. It is hydrophilic, non-toxic and hygienic. It is a porous membrane filter material with relatively uniform pore size distribution and penetrability. Microporous, with an absolute pore diameter of up to 80‰. It is mainly used for the filtration of aqueous solution, so it is also called aqueous membrane. In the application of membrane separation technology, microporous membrane is the earliest industrialization, the most widely used, and also the most consumed type of membrane. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/76B01D69/02B01D67/00
CPCB01D67/0079B01D69/02B01D71/76B01D2325/30
Inventor 谢新昇杨立军张淑娴
Owner 谢新昇
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