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Scale inhibitor for reverse osmosis membrane and preparation method thereof

A technology of reverse osmosis membrane and antiscalant, which is applied in the field of antiscalant, can solve the problems such as white flocculent precipitation, achieve good dispersion of light transmission performance, and improve the effect of scale removal rate

Active Publication Date: 2019-12-20
NETWO XIAMEN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The compound antiscalant can not solve the problem of easily producing white flocculent precipitate when inhibiting silica

Method used

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  • Scale inhibitor for reverse osmosis membrane and preparation method thereof
  • Scale inhibitor for reverse osmosis membrane and preparation method thereof
  • Scale inhibitor for reverse osmosis membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A scale inhibitor for reverse osmosis membranes, calculated in parts by weight, comprising the following components:

[0023] 14 parts of modified polyepoxysuccinic acid, 6 parts of hydrolyzed maleic anhydride, 4 parts of adipic acid / hexanediol methyl ester copolymer, 6 parts of malonic acid / amino-terminated polyether / diethylenetriamine copolymer, 1 part of pentasodium ethylene triamine pentaacetic acid, 0.03 part of phenylpropanisothiazolinone, and 60 parts of deionized water. The modified polyepoxysuccinic acid is prepared from maleic anhydride and 2-propenylamine-2-methylpropenesulfonic acid.

[0024] Preparation:

[0025] 1) First mix modified polyepoxysuccinic acid, adipic acid / hexanediol methyl ester copolymer, malonic acid / amino-terminated polyether / diethylenetriamine copolymer and part of deionized water before ultrasonic vibration, Obtain mixed solution A;

[0026] 2) Mix the hydrolyzed maleic anhydride, pentasodium diethylenetriaminepentaacetic acid and the...

Embodiment 2

[0031] A scale inhibitor for reverse osmosis membranes, calculated in parts by weight, comprising the following components:

[0032] 12 parts of modified polyepoxysuccinic acid, 4 parts of hydrolyzed maleic anhydride, 6 parts of adipic acid / hexanediol methyl ester copolymer, 4 parts of malonic acid / amino-terminated polyether / diethylenetriamine copolymer, 2 parts of pentammonium ethylene triamine pentaacetic acid, 0.01 part of phenylpropanisothiazolinone, and 50 parts of deionized water. The modified polyepoxysuccinic acid is prepared from maleic anhydride and 2-propenylamine-2-methylpropenesulfonic acid.

[0033] Preparation:

[0034] 1) First mix modified polyepoxysuccinic acid, adipic acid / hexanediol methyl ester copolymer, malonic acid / amino-terminated polyether / diethylenetriamine copolymer and part of deionized water before ultrasonic vibration, Obtain mixed solution A;

[0035] 2) Mix and stir the hydrolyzed maleic anhydride, pentaammonium diethylenetriaminepentaacetat...

Embodiment 3

[0040] A scale inhibitor for reverse osmosis membranes, calculated in parts by weight, comprising the following components:

[0041] 16 parts of modified polyepoxysuccinic acid, 8 parts of hydrolyzed maleic anhydride, 3 parts of adipic acid / hexanediol methyl ester copolymer, 8 parts of malonic acid / amino-terminated polyether / diethylenetriamine copolymer, two 1 part of pentasodium ethylene triamine pentaacetic acid, 00.06 parts of bactericide, and 70 parts of deionized water. The modified polyepoxysuccinic acid is prepared from maleic anhydride and 2-propenylamine-2-methylpropenesulfonic acid.

[0042] Preparation:

[0043] 1) First mix modified polyepoxysuccinic acid, adipic acid / hexanediol methyl ester copolymer, malonic acid / amino-terminated polyether / diethylenetriamine copolymer and part of deionized water before ultrasonic vibration, Obtain mixed solution A;

[0044] 2) Mix the hydrolyzed maleic anhydride, pentasodium diethylenetriaminepentaacetic acid and the rest of t...

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Abstract

The invention provides an antisludging agent for a reverse osmosis membrane and a preparation method of the antisludging agent. The antisludging agent comprises the following components: 12-16 parts of modified polyepoxysuccinic acid, 4-8 parts of hydrolyzed maleic anhydride, 3-6 parts of adipic acid / hexanediol methyl ester copolymer, 4-8 parts of malonic acid / amine-terminated polyether / diethylenetriamine copolymer, 1-2 parts of diethylenetriamine pentaacetate, 0.01-0.06 part of bactericide, and 50-70 parts of deionized water. The preparation method is as follows: 1) mixing the modified polyepoxysuccinic acid, the adipic acid / hexanediol methyl ester copolymer, the malonic acid / amine-terminated polyether / diethylenetriamine copolymer and part of deionized water, carrying out ultrasonic concussion to obtain a mixed solution A; 2) mixing hydrolyzed maleic anhydride, diethylenetriamine pentaacetate and the rest of the deionized water, adding the mixed solution A and the bactericide, and stirring evenly. The antisludging agent not only effectively eliminates the deposition of CaSO4 and CaCO3, but also removes scales of calcium phosphate and silicon dioxide, and no white flocculent precipitate is produced.

Description

technical field [0001] The invention belongs to the technical field of scale inhibitors, and in particular relates to a scale inhibitor for reverse osmosis membranes and a preparation method thereof. Background technique [0002] Water resources are very important and extremely precious natural resources. With the development of modern industry, industrial water consumption has increased sharply, and more and more waste water has been produced, which has aggravated the worldwide water source crisis. As far as my country's water resources are concerned, more than half of the cities in the country are short of water, and water pollution is very serious. Reverse osmosis technology is an efficient and advanced membrane water treatment technology developed with the development of membrane materials in the 1960s. Because reverse osmosis technology has the advantages of no phase change, componentization, simple process, convenient operation, stable effluent quality, small footpri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/08
CPCB01D65/08B01D2321/168
Inventor 黄锦静
Owner NETWO XIAMEN ENVIRONMENTAL PROTECTION TECH CO LTD
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