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Regenerating preprocessing agent for inorganic membrane or ultrafilter membrane and preparation method thereof

A pretreatment agent and inorganic membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of short gas scouring time, unstable mechanical force, unstable peroxide, etc., to achieve The effect of shortening the membrane regeneration time, prolonging the service life, and improving the membrane regeneration effect

Inactive Publication Date: 2009-01-14
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the general retentate will react directly with the peroxide, and a considerable part will be consumed when the peroxide penetrates into the retentate; in addition, the peroxide is very unstable under high temperature and high alkali conditions. After releasing oxygen quickly, too fast concentrated release of gas will make the gas flushing time short and the mechanical force unstable

Method used

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  • Regenerating preprocessing agent for inorganic membrane or ultrafilter membrane and preparation method thereof
  • Regenerating preprocessing agent for inorganic membrane or ultrafilter membrane and preparation method thereof
  • Regenerating preprocessing agent for inorganic membrane or ultrafilter membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Get 1500g deionized water and add 1000g acetic acid, then add 1000g (50% hydrogen peroxide), stir so that acetic acid and hydrogen peroxide are completely dissolved in water; add 100.0g aminotrimethylene phosphonic acid to the above solution and then add about 300g nonanoic acid, heat up After stirring at 45°C for about 30 minutes, lower it to 25°C for later use; add about 5.0g of sodium dodecylbenzenesulfonate to the cooled solution, and then add deionized water to control the total mass to 5000g, and stir the solution evenly Store in an environment of 30±5°C for 9 days and then perfuse to obtain the finished product 1.

[0023] Take 1600g of deionized water and add 1300g of acetic acid, then add 1000g (50% hydrogen peroxide), stir to completely dissolve the acetic acid and hydrogen peroxide in the water; heat up to 45°C and stir for about 30 minutes, then drop to 25°C for later use; the solution after cooling Add about 5.0 g of sodium dodecylbenzene sulfonate, and the...

Embodiment 2

[0027] Get 1500g deionized water and add 1500g acetic acid, then add 1500g (50% hydrogen peroxide), stir so that acetic acid and hydrogen peroxide are completely dissolved in water; add 75.0g aminotrimethylene phosphonic acid to the above solution and then add about 200g nonanoic acid, heat up After stirring at 45°C for about 30 minutes, lower it to 25°C for later use; add about 2.5g of sodium dodecylbenzenesulfonate to the cooled solution, and then add deionized water to control the total mass to 5000g, and stir the solution evenly Store in an environment of 30±5°C for 9 days and then perfuse to obtain the finished product 3.

[0028] Take 1200g of deionized water and add 1500g of acetic acid, then add 1250g (50% hydrogen peroxide), stir to completely dissolve the acetic acid and hydrogen peroxide in the water; heat up to 45°C and stir for about 30 minutes, then drop to 25°C for later use; the solution after cooling Add about 3.7g of sodium dodecylbenzenesulfonate, and then a...

Embodiment 3

[0032] Get 1500g deionized water and add 1250g acetic acid, then add 1250g (50% hydrogen peroxide), stir so that acetic acid and hydrogen peroxide are completely dissolved in water; add 88.0g aminotrimethylene phosphonic acid and then add about 250g nonanoic acid in the above solution, heat up After stirring at 45°C for about 30 minutes, lower it to 25°C for later use; add about 3.7g of sodium dodecylbenzenesulfonate to the cooled solution, then add deionized water to control the total mass to 5000g, and stir the solution evenly Store in an environment of 30±5°C for 9 days and then perfuse to obtain the finished product 3.

[0033] Use deionized water to prepare an aqueous solution containing about 0.5% of the finished product 3 as a regeneration pretreatment agent, and pressurize the ceramic nanofiltration membrane that has filtered the aloe extract for about 7 hours for 10 minutes, and then use 4.0% hydrogen to oxidize Sodium solution is used for regeneration. Before the reg...

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Abstract

Disclosed is the inorganic membrane or the ultrafiltration membrane regeneration pretreating agent, and the preparation method, which belongs to the membrane-cleaning reclaiming agent field. The membrane regeneration pretreating agent is remixed by materials of surface active agent, nonanoic acid, acetic acid, oxydol and amino tri-methylene phosphonic acid. The retention substances in the membrane holes and on the surface of the membrane can be rapidly removed for obviously improving the membrane regeneration efficiency by conducting pre-washing treatment to polluted inorganic membrane or ultrafiltration membrane by using the product and then conducting regeneration by using the high temperature alkali regenerating solution. The invention utilizes amino tri-methylene phosphonic acid as the stabilizing agent of the peroxy organic acid, then the peroxide mixture can release nascent oxygen under the conditions of high temperature and high alkalinity, and control the mechanical force produced by the aerogenesis of the peroxide under the micro environment. The compact structure of the retention substances is effectively destroyed in the process of regeneration for accelerating the dirt dissolving speed of the alkali, and the aerogenesis mechanical force is controlled in a certain range for avoiding the damage to the membrane materials. The invention can be widely applied in food, biochemical, petrochemical, steel and mechanical manufacturing industries.

Description

technical field [0001] An inorganic membrane or ultrafiltration membrane regeneration pretreatment agent and a preparation method thereof belong to the field of membrane cleaning regeneration agents. Specifically, it relates to a membrane cleaning regeneration pretreatment agent prepared by compounding and aging surfactant, nonanoic acid, acetic acid, hydrogen peroxide and amino trimethylene phosphonic acid, and also relates to a preparation method of the membrane regeneration pretreatment agent. Prepare a solution containing 0.2% to 2.0% of this product with water, pre-wash the polluted inorganic membrane or ultrafiltration membrane, and then clean and regenerate it with a high-temperature alkali regeneration solution. Background technique [0002] Various inorganic membranes or ultrafiltration membranes are widely used in food industry, biochemical industry, petrochemical industry, steel, machinery manufacturing and other industries, mainly in the process steps such as con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/06
Inventor 钱和廖海雁
Owner JIANGNAN UNIV
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