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A kind of alkaline cleaning agent for hollow fiber ultrafiltration membrane and its preparation method and application

A technology of ultrafiltration membrane and cleaning agent, which is applied in the preparation of detergent mixture composition, surface active detergent composition, ultrafiltration, etc., and can solve the problems of low membrane flux recovery rate, rapid membrane flux decline rate, and Flux recovery rate is small and other problems, to achieve good cleaning effect, high membrane flux recovery rate, increase the effect of cleaning effect

Active Publication Date: 2021-09-28
上海宝聚表面技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of physical cleaning can quickly restore the water permeability of the hollow fiber ultrafiltration membrane to a certain extent in a short period of time, not only the recovery rate of the membrane flux is low, but also the hollow fiber ultrafiltration membrane used again has a rapid decline rate
The way of chemical cleaning is to use chemical reagents to clean the pollutants on the surface of the hollow fiber ultrafiltration membrane. The commonly used chemical reagents are hydrochloric acid, sodium hydroxide, sodium hypochlorite, hydrogen peroxide, citric acid, etc., which can clean metal ions, inorganic salts and inorganic Scale pollution has a good removal effect, but it is difficult to remove organic proteins, and after repeated pollution and cleaning of the hollow fiber ultrafiltration membrane, the membrane flux of the cleaned hollow fiber ultrafiltration membrane recovers. rate is small

Method used

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  • A kind of alkaline cleaning agent for hollow fiber ultrafiltration membrane and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] An alkaline cleaning agent for a hollow fiber ultrafiltration membrane, the raw material ratio of which is shown in Table 1.

[0046] Wherein, the pH adjusting agent includes sodium hydroxide, sodium carbonate, and sodium bicarbonate, and the weight ratio of sodium hydroxide, sodium carbonate, and sodium bicarbonate is 10:3:1; the membrane protecting agent is glycerol.

[0047] A preparation method for an alkaline cleaning agent for a hollow fiber ultrafiltration membrane, comprising the steps of:

[0048] S1. Heat the water to 70°C, then add non-ionic penetrant, glycerol block polyether, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether sodium sulfate, sodium lauryl sulfate, mix well, get mixture a;

[0049] S2, adding a chelating dispersant, a film protecting agent, and a plant polyphenol into the mixture a to obtain the mixture b;

[0050] S3. Add a pH adjuster to the mixture b, mix evenly, and cool down to obtain an alkaline cleaning agent. ...

Embodiment 2

[0052] An alkaline cleaning agent for a hollow fiber ultrafiltration membrane, the raw material ratio of which is shown in Table 1.

[0053] Wherein, the pH adjusting agent includes sodium hydroxide, sodium carbonate, and sodium bicarbonate, and the weight ratio of sodium hydroxide, sodium carbonate, and sodium bicarbonate is 10:3.5:1.5; the membrane protecting agent is pentaerythritol.

[0054] A preparation method for an alkaline cleaning agent for a hollow fiber ultrafiltration membrane, comprising the steps of:

[0055] S1. Heat the water to 60°C, then add non-ionic penetrant, glycerol block polyether, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether sodium sulfate, sodium lauryl sulfate, mix well, get mixture a;

[0056] S2, adding a chelating dispersant, a film protecting agent, and a plant polyphenol into the mixture a to obtain the mixture b;

[0057] S3. Add a pH adjuster to the mixture b, mix evenly, and cool down to obtain an alkaline clean...

Embodiment 3

[0059] An alkaline cleaning agent for a hollow fiber ultrafiltration membrane, the raw material ratio of which is shown in Table 1.

[0060] Wherein, the pH adjusting agent includes sodium hydroxide, sodium carbonate, and sodium bicarbonate, and the weight ratio of sodium hydroxide, sodium carbonate, and sodium bicarbonate is 10:4:2; the membrane protecting agent is diethylene glycol.

[0061] A preparation method for an alkaline cleaning agent for a hollow fiber ultrafiltration membrane, comprising the steps of:

[0062] S1. Heat the water to 50°C, then add non-ionic penetrant, glycerol block polyether, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether sodium sulfate, sodium lauryl sulfate, mix well, get mixture a;

[0063] S2, adding a chelating dispersant, a film protecting agent, and a plant polyphenol into the mixture a to obtain the mixture b;

[0064] S3. Add a pH adjuster to the mixture b, mix evenly, and cool down to obtain an alkaline cleanin...

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Abstract

The application relates to an alkaline cleaning agent for hollow fiber ultrafiltration membranes and its preparation method and application, belonging to the technical field of cleaning agent processing. Alkaline cleaning agent, in parts by weight, its raw materials include 45-65 parts of water, pH Regulator 25-35 parts, chelating dispersant 2-8 parts, membrane protection agent 2-10 parts, plant polyphenol 0.5-1.5 parts, non-ionic penetrant 6-11 parts, glycerol block polyether 1.5- 2.5 parts, fatty alcohol polyoxyethylene ether 3.2-5.1 parts, fatty alcohol polyoxyethylene ether sodium sulfate 6.4-10.2 parts, sodium lauryl sulfate 8.5-11.5 parts. The alkaline cleaning agent enables the hollow fiber ultrafiltration membrane to have a higher membrane flux recovery rate and good cleaning effect after the hollow fiber ultrafiltration membrane is repeatedly polluted and cleaned. Moreover, the alkaline cleaning agent also has the advantages of simple preparation, convenient control and convenient use.

Description

technical field [0001] The application relates to the technical field of cleaning agent processing, more specifically, it relates to an alkaline cleaning agent for hollow fiber ultrafiltration membranes and its preparation method and application. Background technique [0002] Ultrafiltration membrane is a microporous filtration membrane with uniform pore size and rated pore size range of 0.001-0.02μm, which is used in unit operations of biological products, pharmaceutical products, sewage treatment, etc. The hollow fiber ultrafiltration membrane is a kind of ultrafiltration membrane. When the hollow fiber ultrafiltration membrane is used in the MBR treatment system, the raw water flows under pressure outside the hollow fiber or in the inner cavity, respectively forming an external pressure type and an internal pressure type. Filtration is a dynamic filtration process. Clear water is discharged through hollow fibers, and the intercepted substances can be discharged with conce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11D1/83C11D3/382C11D3/37C11D3/20C11D3/10C11D3/04C11D3/60B01D65/06B01D69/08B01D61/14
CPCC11D1/83C11D3/382C11D3/3765C11D3/2065C11D3/2068C11D3/10C11D3/044B01D65/02B01D69/08B01D61/145C11D1/146C11D1/29C11D1/72C11D1/66C11D1/345B01D2321/16B01D2321/164B01D2321/168C11D2111/12
Inventor 陈高山李国栋宋高辉徐晓静
Owner 上海宝聚表面技术有限公司
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