Quadripolymer-type corrosion-inhibition scale inhibitor PMAHS and preparation method thereof

A corrosion and scale inhibitor, polymerized technology, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. Good dispersibility, less dosage, and excellent scale inhibition performance

Inactive Publication Date: 2012-10-24
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research and development of polymeric water treatment agents are mostly based on binary or terpolymeric types, such as CN 01123146 "low molecular weight (meth)acrylic acid (salt) polymers and their preparation methods and uses", etc., in terms of performance The technology is not advanced enough, the function is not perfect enough

Method used

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  • Quadripolymer-type corrosion-inhibition scale inhibitor PMAHS and preparation method thereof
  • Quadripolymer-type corrosion-inhibition scale inhibitor PMAHS and preparation method thereof
  • Quadripolymer-type corrosion-inhibition scale inhibitor PMAHS and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 80kg of water and put it in the reactor, slowly add 25kg of maleic anhydride, stir, heat to 65℃~85℃, add 5kg of molecular weight regulator isopropanol under stirring conditions; then prepare 10kg of acrylic acid and 10kg of acrylic acid hydroxy The mixed solution of ethyl ester (I) 60~90kg; and the mixed solution of 15kg sodium methallyl sulfonate, 5kg sodium persulfate and 6kg sodium hypophosphite (II) 60~90kg;

[0017] Note: Dissolve sodium methallyl sulfonate and sodium persulfate before adding sodium hypophosphite. Water should not be added all at once, but should be added slowly. Under the condition of continuous stirring, adjust the temperature of the reactor to 65℃~85℃, and add the mixed solution (I) and (II) dropwise at the same time, and control the dropping speed of the mixed solution (I) and (II) to be 0.5~1 The dripping is completed within hours at the same time, kept at a constant temperature for 1 to 5 hours, and cooled to obtain the PMAHS of the present...

Embodiment 2

[0019] Take 60kg of water and place it in the reactor, slowly add 30kg of maleic anhydride, stir, heat to 65℃~85℃, add 10kg of molecular weight regulator isopropanol under stirring conditions; then prepare 15kg of acrylic acid and 5kg of acrylic acid hydroxy The mixed solution of ethyl ester (I) is about 60~90kg; and the mixed solution of 10kg of sodium methallyl sulfonate, 10kg of sodium persulfate and 8kg of sodium hypophosphite (II) is 60~90kg; Methods and steps to operate.

Embodiment 3

[0021] Take 70kg of water and place it in the reactor, slowly add 40kg of maleic anhydride, stir, heat to 65℃~85℃, add 8kg of molecular weight regulator isopropanol under stirring conditions; prepare another 5kg of acrylic acid and 15kg of acrylic acid hydroxy The mixed solution of ethyl ester (I) is about 60 kg; and the mixed solution of 20 kg of sodium methallyl sulfonate, 15 kg of sodium persulfate and 10 kg of sodium hypophosphite (II) is about 60 kg; according to the method and steps of Example 1 above To proceed.

[0022] Specific comparison method

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Abstract

The invention discloses a quadripolymer-type corrosion-inhibition scale inhibitor PMAHS. The quadripolymer-type corrosion-inhibition scale inhibitor PMAHS comprises maleic anhydride (MA), acrylic acid (AA), hydroxyethyl acrylate (HEA), sodium methallylsulfonate (SMAS), sodium persulfate, sodium hypophosphite, isopropanol and water. The invention also discloses a preparation method of the quadripolymer-type corrosion-inhibition scale inhibitor PMAHS. The quadripolymer-type corrosion-inhibition scale inhibitor PMAHS has excellent effects of inhibiting production of calcium phosphate scales and calcium carbonate scales and especially phosphate scales, has good iron oxide dispersibility, has functions of corrosion inhibition, high temperature resistance and acid and base resistance, and has a stable molecular structure and low phosphorus content. The preparation method does not produce three wastes in production. The quadripolymer-type corrosion-inhibition scale inhibitor PMAHS has the advantages of simple circulating cooling water treatment processes, low use amount, low cost, good effects, good economic benefits and wide social benefits.

Description

Technical field [0001] The invention belongs to the chemical industry field, and relates to a quaternary polymerization type corrosion and scale inhibitor PMAHS used in industrial cooling water systems and a preparation method thereof. Background technique [0002] Copolymer corrosion and scale inhibitor is a new type of pollution-free industrial water treatment agent developed in the 1980s. In copolymer corrosion and scale inhibitors, carboxyl and phosphono are the active groups for inhibiting calcium carbonate scale; carboxyl and polyoxyethylene are active groups for inhibiting calcium phosphate scale; ester groups, hydroxyl groups, sulfonic acid groups, amides The phosphono carboxylic acid chelates with the metal ion, and it is adsorbed on the metal surface to have corrosion inhibition effect. The phosphono carboxylic acid is not easy to be hydrolyzed and has scale inhibition performance; sulfonic acid group It is highly effective in inhibiting dirt and has a stabilizing effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10
Inventor 王水良王平
Owner NANJING FORESTRY UNIV
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