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Reverse osmosis membrane scale inhibitor and preparation method thereof

A technology of reverse osmosis membrane and scale inhibitor, which is applied in the field of reverse osmosis membrane scale inhibitor and its preparation, can solve the problems of high cost, poor thermal stability, and pollution of water body, etc., and achieve good bactericidal effect, Simple to use, great polarizing effect

Inactive Publication Date: 2015-11-11
SUZHOU YOUJUN ENVIRONMENTAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the above technical problems, this application provides a reverse osmosis membrane scale inhibitor and its preparation method, which solves the technical problems of existing water treatment scale inhibitors such as high cost, pollution to water bodies, poor thermal stability and slow release performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take by weight 230 parts of sodium polyepoxysuccinate; 55 parts of amino trimethylene phosphonic acid; 0.5 part of pentasodium diethylene triamine pentaacetate; cetyl tributylphosphine bromide 1 100 parts of distilled water; 0.5 parts of dodecyltriphenylphosphorus bromide; 0.1 part of methoxymethyl triphenylphosphorus bromide; 2 parts of ethyl diphosphonic acid; 4 parts of polyacrylic acid; 2 parts of benzotriazole.

[0025] Add hydroxyethylidene diphosphonic acid and distilled water into a four-necked flask equipped with an electric stirrer, dropping funnel, thermometer and reflux condenser, heat to 70°C, stir for 40 minutes, add benzotriazole and aminotrimethylene dropwise Based phosphonic acid, heated to 70 ° C, reacted for 2h.

[0026] Add ethylenediamine, 1,2-benzisothiazolin-3-one, pentasodium diethylenetriaminepentaacetate and polyacrylic acid, raise the temperature to 95°C, react for 1h, raise the temperature to 115°C, add the remaining raw materials, Stir for...

Embodiment 2

[0029] Weigh according to the ratio of parts by weight: 250 parts of sodium polyepoxysuccinate; 75 parts of amino trimethylene phosphonic acid; 2.5 parts of pentasodium diethylene triamine pentaacetate; hexadecyl tributyl phosphorus bromide 5 parts; 100 parts of distilled water; 2.5 parts of dodecyltriphenylphosphorus bromide; 2 parts of methoxymethyltriphenylphosphorus bromide; 2.5 parts of 1,2-benzisothiazolin-3-one; 8 parts of ethylene diphosphonic acid; 8 parts of polyacrylic acid; 6 parts of benzotriazole.

[0030] Add hydroxyethylidene diphosphonic acid and distilled water into a four-necked flask equipped with an electric stirrer, dropping funnel, thermometer and reflux condenser, heat to 90°C, stir for 60 minutes, add benzotriazole and aminotrimethylene dropwise Base phosphonic acid, heated to 110 ° C, reacted for 6h.

[0031] Add ethylenediamine, 1,2-benzisothiazolin-3-one, pentasodium diethylenetriaminepentaacetate and polyacrylic acid, raise the temperature to 135°...

Embodiment 3

[0034] Take by weight 235 parts of sodium polyepoxysuccinate; 60 parts of amino trimethylene phosphonic acid; 1 part of pentasodium diethylene triamine pentaacetate; 2 parts of hexadecyl tributyl phosphorus bromide 100 parts of distilled water; 1 part of dodecyltriphenylphosphorus bromide; 0.5 part of methoxymethyltriphenylphosphorus bromide; 1 part of 1,2-benzisothiazolin-3-one; 4 parts of ethyl diphosphonic acid; 5 parts of polyacrylic acid; 3 parts of benzotriazole.

[0035] Add hydroxyethylidene diphosphonic acid and distilled water into a four-necked flask equipped with an electric stirrer, dropping funnel, thermometer and reflux condenser, heat to 70°C, stir for 40 minutes, add benzotriazole and aminotrimethylene dropwise Based phosphonic acid, heated to 70 ° C, reacted for 2h.

[0036] Add ethylenediamine, 1,2-benzisothiazolin-3-one, pentasodium diethylenetriaminepentaacetate and polyacrylic acid, raise the temperature to 95°C, react for 1h, raise the temperature to 11...

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Abstract

The invention discloses a reverse osmosis membrane scale inhibitor and a preparation method thereof. The scale inhibitor is prepared from polyepoxysuccinic acid, amino trimethylene phosphonic acid, diethylenetriamine pentaacetic acid pentasodium salt, hexadecyl tributyl phosphonium bromide, distilled water, dodecyl triphenyl phosphonium bromide, methoxymethyl triphenyl phosphonium bromide, 1, 2-benzisothiazolin-3-one, hydroxyethylidene-1,1-diphosphonic acid, polyacrylic acid and benzotriazole. The usage amount of the scale inhibitor is less and is only 1 to 5 mg / L; the effect is lasting, i.e., after the scale inhibitor is placed for one month at 60 to 80 DEG C, the scale inhibiting ratio is 96 to 100 percent; the reverse osmosis membrane scale inhibitor has a good sterilizing effect and positive effects in improving calcium scale resistance and iron dispersing property.

Description

technical field [0001] The application belongs to the field of environment-friendly reagent technology, and in particular relates to an environment-friendly antiscalant for reverse osmosis membrane with good corrosion inhibition performance and a preparation method thereof. Background technique [0002] Scale inhibitor: It is a kind of agent that can disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on metal surfaces, and maintain good heat transfer effects of metal equipment. The anti-corrosion and anti-scaling agent for cold-changing equipment is formulated with epoxy resin and specific amino resin as the base material, adding appropriate amount of various anti-rust, anti-corrosion and other additives, and is a single component. It has excellent shielding, anti-seepage, anti-rust properties, good scale resistance, thermal conductivity, excellent resistance to weak acids, strong alkalis, organ...

Claims

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Application Information

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IPC IPC(8): B01D65/08
Inventor 金可心凌云凌天阳
Owner SUZHOU YOUJUN ENVIRONMENTAL SCI & TECH
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