Reverse osmosis compound scale inhibitor

A compound antiscalant and reverse osmosis technology, which is applied in the field of reverse osmosis water treatment materials, can solve the problems of limited use conditions and easy pollution of compound antiscalants, and achieve the effect of reducing operating costs and prolonging service life

Inactive Publication Date: 2011-02-16
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The technical problem to be solved by the invention: In view of the limited use conditions of the existing composite scale inhibitors used in reverse osmosis systems and easy to cause pollution, the present invention aims to provide a composite scale inhibitor for reverse osmosis, which can be used for reverse osmosis Osmosis process, reduce membrane fouling, improve operating efficiency of reverse osmosis system, prolong operating life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Get hydroxyethylidene diphosphonic acid aqueous solution 29.9g, hydrolyzed polymaleic anhydride aqueous solution 60.0g, polyacrylic acid aqueous solution 85.7g, sulfonated styrene-maleic anhydride copolymer aqueous solution 21.4g and dodecyl dimethyl benzyl chloride Add 11.4g of ammonium chloride into the reaction vessel, stir evenly and place at room temperature for 24 hours, the active ingredient content of the composite scale inhibitor is 48.0%.

[0022] Example 2

Embodiment 2

[0025] According to the calculated amount, 10.0g of hydroxyethylidene diphosphonic acid powder, 80.0g of hydrolyzed polymaleic anhydride aqueous solution, 111.4g of polyacrylic acid aqueous solution, 14.2g of sulfonated styrene-maleic anhydride copolymer aqueous solution and dodecyl dimethyl Add 2.3 g of benzyl ammonium chloride into the reaction vessel, stir evenly and place at room temperature for 24 hours, the active ingredient content of the composite antiscalant is 45.9%.

[0026] Example 3

Embodiment 3

[0029] Get 22.4g of hydroxyethylidene diphosphonic acid aqueous solution, 60.0g of hydrolyzed polymaleic anhydride aqueous solution, 91.4g of polyacrylic acid aqueous solution, 28.6g of sulfonated styrene-maleic anhydride copolymer aqueous solution and dodecyl dimethyl benzyl chloride Add 6.8g of ammonium chloride into the reaction vessel and stir evenly. The active ingredient content of the composite scale inhibitor is 47.8%.

[0030] Example 4

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PUM

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Abstract

The invention provides a reverse osmosis compound scale inhibitor and belongs to the field of reverse osmosis water treatment. The scale inhibitor comprises the following components in percentage by weight: 10 to 20 percent of 1-hydroxyethylidene-1,1-diphosphonic acid, 30 to 40 percent of hydrolytic polymaleic anhydride, 30 to 40 percent of polyacrylic acid and 10 to 20 percent of sulfonated styrene-maleic anhydride copolymer, and the scale inhibitor comprises also comprises a bactericide. The reverse osmosis compound scale inhibitor fully utilizes the synergistic effect among organic phosphorous scale inhibitors, polycarboxylic acid scale inhibitors and sulfonic acid scale inhibitors, has good scale inhibition and dispersion performance; and when used in a reverse osmosis water inflow system, the scale inhibitor can effectively lighten pollution of calcium carbonate, calcium sulfate and silicate to reverse osmosis membranes and prolongs the cleaning period and service life of the reverse osmosis system.

Description

[0001] technical field [0002] The invention relates to a reverse osmosis water treatment material, in particular to a reverse osmosis composite scale inhibitor capable of reducing membrane fouling. Background technique [0003] Reverse osmosis is a membrane separation technology that originated in the 1960s and has been widely used in water treatment. In some coastal areas where fresh water resources are scarce, reverse osmosis is used for seawater desalination to provide fresh water for people's production and life. At the same time, as a high-purity water preparation technology, reverse osmosis can meet the water requirements of semiconductor, microelectronics, electric power, chemical industry, medicine and other fields. In today's increasingly scarce water resources, reverse osmosis has also been widely used in wastewater treatment as advanced wastewater treatment technology and water resource reuse technology. [0004] In the reverse osmosis water treatment process,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14
Inventor 任洪强申战辉许柯胡小兵王钊
Owner NANJING UNIV
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