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Preparation method of non-phosphate environment-friendly scale-resistant dispersing agent

A scale inhibitor and dispersant, environmentally friendly technology, applied in chemical instruments and methods, scale removal and water softening, water/sludge/sewage treatment, etc. The problem of single scale inhibitor material, etc., achieves good scale inhibition effect, environmental friendliness, and the effect of preventing scale.

Inactive Publication Date: 2016-11-23
丁玉琴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: the antiscaling effect of the current antiscaling agent is not ideal, and the water treatment agent on the market is mainly based on phosphorus, which is not only easy to cause harm to the environment, but also has a single problem of antiscaling substances. The preparation method of the non-phosphorus environment-friendly anti-scaling dispersant, the present invention firstly uses wheat starch to prepare amylose, then carries out the copolymerization reaction of amylose, maleic anhydride and acrylic acid to obtain amylose-maleic anhydride-acrylic acid terpolymer , the terpolymer, polyaspartic acid, sodium lignin sulfonate and other complexing agents and deionized water are stirred and mixed evenly to obtain the scale inhibitor dispersant. The scale inhibitor dispersant prepared by the present invention is economical and environmentally friendly , high efficiency, not only can inhibit the copolymer of calcium carbonate scale, calcium sulfate scale and calcium phosphate scale, but also inhibit the copolymer of zinc scale, iron scale, silicon scale and other dirt, the scale inhibition effect is good, and the generation of scale can be prevented At the same time, it can fully disperse the scale deposited in the water system, which is environmentally friendly and biodegradable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] Weigh 15g of wheat starch, add it into deionized water according to the solid-to-liquid ratio of 1:10, stir and mix for 30min, put it into a three-necked flask, put it in a boiling water bath, and slowly add 200mL mass fraction into the three-necked flask after stirring and mixing for 30min 25% sodium hydroxide solution, control the dripping in 20min, pour the product of the three-neck flask into the beaker after dripping, add 100mL 5% sodium chloride solution in mass fraction to the beaker, adjust the pH value with 20% hydrochloric acid 7.0, after adjustment, let it stand for 18 hours, take the supernatant, and set aside; mix the above supernatant with isobutanol at a volume ratio of 5:1, stir and mix for 1 hour, let stand for 5 hours, and centrifuge at 1000r / min after standing Separate the precipitate, then add the precipitate into isobutanol according to the solid-to-liquid ratio of 1:5, repeat the steps of standing and centrifuging twice, wash the obtained precipitat...

example 2

[0022]Weigh 20g of wheat starch, add it into deionized water according to the solid-to-liquid ratio of 1:10, stir and mix for 35min, put it into a three-necked flask, and put it in a boiling water bath, slowly add 225mL mass fraction into the three-necked flask after stirring and mixing for 40min 25% sodium hydroxide solution, control the dripping in 25 minutes, after the dripping, pour the product of the three-neck flask into the beaker, add 110mL of 5% sodium chloride solution in mass fraction to the beaker, adjust the pH value with 20% hydrochloric acid in mass fraction 7.0, after adjustment, let it stand for 19 hours, take the supernatant, and set it aside; mix the above supernatant with isobutanol at a volume ratio of 5:1, stir and mix for 1.5 hours, then let it stand for 6 hours, and then set it aside at 1500r / min Centrifuge to separate the precipitate, then add the precipitate to isobutanol according to the solid-to-liquid ratio of 1:5, repeat the standing and centrifugi...

example 3

[0025] Weigh 30g of wheat starch, add it into deionized water according to the solid-to-liquid ratio of 1:10, stir and mix for 40min, put it into a three-necked flask, put it in a boiling water bath, and slowly add 250mL mass fraction into the three-necked flask after stirring and mixing for 50min 25% sodium hydroxide solution, control the dripping in 30min, pour the product of the three-necked flask into the beaker after dripping, add 120mL 5% sodium chloride solution in mass fraction to the beaker, adjust the pH value with 20% hydrochloric acid in mass fraction 7.0, after adjustment, let it stand for 20 hours, take the supernatant, and set aside; mix the above supernatant with isobutanol at a volume ratio of 5:1, stir and mix for 2 hours, then let it stand for 8 hours, and then centrifuge at 2000r / min Separate the precipitate, then add the precipitate into isobutanol according to the solid-to-liquid ratio of 1:5, repeat the steps of standing and centrifuging for 3 times, wash...

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Abstract

The invention discloses a preparation method of a phosphorus-free environment-friendly scale inhibitor dispersant and belongs to the technical field of scale inhibitor dispersants. The present invention first utilizes wheat starch to prepare amylose, carries out copolymerization reaction with amylose, maleic anhydride and acrylic acid to obtain amylose-maleic anhydride-acrylic acid terpolymer, and terpolymer, polyaspartic acid acid, sodium lignosulfonate and other complexing agents and deionized water, and stir and mix evenly to obtain a scale inhibitor dispersant. The scale inhibitor dispersant prepared by the present invention is economical, environmentally friendly, and efficient, and can not only inhibit calcium carbonate scale, sulfuric acid scale The copolymer of calcium scale and calcium phosphate scale, and also inhibits the copolymer of zinc scale, iron scale, silicon scale and other scales. It has good scale inhibition effect, prevents the generation of scale, and can fully disperse the scale deposited in the water system. , environmentally friendly and biodegradable.

Description

technical field [0001] The invention discloses a preparation method of a phosphorus-free environment-friendly scale inhibitor dispersant and belongs to the technical field of scale inhibitor dispersants. Background technique [0002] Anti-scaling dispersant is a copolymer containing carboxyl, hydroxyl, sulfuric acid, phosphonic acid groups and other groups, because its straight chain and some branches contain phosphonic acid groups, so this copolymer has excellent anti-scaling performance, and It has a certain anti-corrosion effect, can inhibit the generation of scales such as calcium carbonate and calcium sulfate, and distort the crystal lattice. It also has a good dispersion effect on iron oxide and calcium phosphate. It can be used in combination with polyphosphate, organic phosphonic acid and other corrosion inhibitors. It is generally used in open circulating cooling water systems with low concentration multiples and harsh operating conditions. [0003] Organic scale i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12C02F5/10
CPCC02F5/12C02F5/10
Inventor 丁玉琴王统军
Owner 丁玉琴
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