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Scale inhibitor and preparation for reverse osmosis membrane

A technology of corrosion and scale inhibitor and reverse osmosis membrane, applied in chemical products and their preparation, in the field of corrosion and scale inhibitor, can solve the problems of high price, high use cost, low scale inhibition rate, etc. Stable performance and good biodegradability

Inactive Publication Date: 2008-09-03
河北盛华化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the scale inhibitors used have problems such as high price, high use cost, harmful substances that are not conducive to environmental protection, and low scale inhibition rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Polymerization of sodium polyacrylate: Weigh 150% of deionized water and 170% of acrylic acid by weight unit, add to the reaction kettle and stir, add NaOH to make sodium acrylate at a temperature lower than 60°C, adjust the pH to 7-9, stir for 10 minutes and then beat Put into the high level tank; take deionized water 120 by weight unit, sodium bisulfite 5, ammonium persulfate 7, make sodium bisulfite, ammonium persulfate dissolve in deionized water and prepare initiator, squeeze into the initiator high level tank When the temperature of the reaction kettle is raised to 80°C±2°C, sodium acrylate and initiator are added dropwise, sodium acrylate and initiator are added dropwise at a ratio of 10:1, polymerized for 3 hours, and after holding for half an hour, sodium polyacrylate is obtained.

[0018] Synthesis of hydrolyzed polymaleic anhydride: Weigh deionized water 800, maleic anhydride 150, ferric chloride 0.22, ammonium persulfate 22 by weight unit, add deionized water...

Embodiment 2

[0023] Synthesis of sodium polyacrylate: Weigh 200% of deionized water and 180% of acrylic acid by weight unit, add to the reactor and stir, add NaOH to make sodium acrylate at a temperature lower than 60°C, adjust the pH to 7-9, stir for 10 minutes and beat Put into the high level tank; take deionized water 120 by weight unit, sodium bisulfite 7, ammonium persulfate 8, make sodium bisulfite, ammonium persulfate dissolve in deionized water and prepare initiator, squeeze into the initiator high level tank When the temperature of the reaction kettle is raised to 80°C±2°C, sodium acrylate and initiator are added dropwise, sodium acrylate and initiator are added dropwise at a ratio of 10:1, polymerized for 3 hours, and after holding for half an hour, sodium polyacrylate is obtained.

[0024] Synthesis of hydrolyzed polymaleic anhydride: Weigh 900 deionized water, 180 maleic anhydride, 0.23 ferric chloride, and 20 ammonium persulfate by weight unit, add deionized water and maleic an...

Embodiment 3

[0029] Synthesis of sodium polyacrylate: Weigh 180% of deionized water and 200% of acrylic acid by weight unit, add to the reaction kettle and stir, add NaOH to make sodium acrylate at a temperature lower than 60°C, adjust the pH to 7-9, stir for 10 minutes and beat Put into the high level tank; take deionized water 120 by weight unit, sodium bisulfite 8, ammonium persulfate 9, make sodium bisulfite, ammonium persulfate dissolve in deionized water and prepare initiator, squeeze into the initiator high level tank When the temperature of the reaction kettle is raised to 80°C±2°C, sodium acrylate and initiator are added dropwise, sodium acrylate and initiator are added dropwise at a ratio of 10:1, polymerized for 3 hours, and after holding for half an hour, sodium polyacrylate is obtained.

[0030] Synthesis of hydrolyzed polymaleic anhydride: Weigh 850 deionized water, 200 maleic anhydride, 0.24 ferric chloride, and 25 ammonium persulfate by weight unit, add deionized water and mal...

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PUM

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Abstract

The invention discloses a reverse osmosis membrane used corrosion and scale inhibitor as well as the preparation method thereof, and belongs to the liquid separation technology field. The invention is used for improving the inhibition effectiveness of the scale inhibitor and reducing the cost. The invention has the technical proposal that the corrosion and scale inhibitor is composed of a basic constituent and additives, the basic constituent is prepared from materials by the weight units as follows: hydroxyethylidene diphosphonic acid of 4 to 5, sodium polyacrylate of 5 to 6, hydrolyzed polymaleic anhydride of 5 to 6, and polyepoxysulfosuccinic acid of 3 to 4. The invention is a non-phosphate, non-nitrogenous and green environmental protection upscale multi-element scale and corrosion inhibitor, which has excellent scale inhibition and dispersion performance aiming at calcium carbonate, calcium sulfate, barium sulfate, calcium fluoride and silica scale in water, the scale inhibition effect exceeds the common organic phosphine scale inhibitor, and the scale inhibition rate reaches 85 percent. The components of the invention have very good synergistic effect, the product performance is stable, the cost is low, and the price is one third lower than that of the similar product in the current market.

Description

technical field [0001] The invention relates to a chemical product and a preparation method thereof, in particular to a corrosion and scale inhibitor for water treatment reverse osmosis membranes, and belongs to the technical field of liquid separation. Background technique [0002] Reverse osmosis is a membrane separation technology powered by pressure difference. It can remove various ions, molecules, colloids, bacteria and other impurities in water. It is currently recognized as a high-efficiency, low-consumption, and pollution-free water treatment technology. In recent years, with the development of membrane technology, reverse osmosis has been more and more widely used in water treatment. In reverse osmosis water treatment technology, membrane fouling, or membrane fouling, is an important factor that affects the efficiency of the reverse osmosis system and reduces the life of the membrane. In order to eliminate or reduce the adverse effects of membrane fouling and impr...

Claims

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Application Information

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IPC IPC(8): B01D65/08B01D61/02
Inventor 马玉莲王会昌李东霞何武胜郭桂花郭围城王强周晓春
Owner 河北盛华化工有限公司
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