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Scale inhibitor dispersant for circulating cooling water system and preparation method thereof

A technology of antiscaling dispersant and circulating cooling water, which is applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. It can solve the problem of narrow application range and no performance of antiscaling and dispersing properties, etc. problem, to achieve the effect of less residue, good zinc and iron oxide dispersion ability, and stable reaction process

Active Publication Date: 2015-11-25
CHANGZHOU KEWEI TIANSHI ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The scale inhibitor is a binary copolymer scale inhibitor, which has good calcium carbonate scale inhibition performance, but does not show other scale inhibition and dispersion properties, and its application range is narrow

Method used

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  • Scale inhibitor dispersant for circulating cooling water system and preparation method thereof
  • Scale inhibitor dispersant for circulating cooling water system and preparation method thereof
  • Scale inhibitor dispersant for circulating cooling water system and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of the antiscaling dispersant that is used for circulating cooling water system of the present embodiment comprises the following steps:

[0025] 1. prepare initiator solution, initiator solution comprises A liquid and B liquid, and described A liquid is that ammonium persulfate 15g is dissolved in 90g deionized water, then transfers into the first constant pressure dropping funnel for use; Solution is to dissolve sodium bisulfite 5g in 95g deionized water, then transfer into the second constant pressure dropping funnel for use.

[0026] ② Prepare mixed monomer solution C liquid, dissolve 50 g of monomer allyl polyoxyethylene ether and 20 g of hydroxypropyl acrylate in 30 g of deionized water, and then transfer it into the third constant pressure dropping funnel for use.

[0027] ③Add maleic anhydride 105g, ferric sulfite heptahydrate 0.01g and deionized water 200g in a five-neck flask equipped with a magnetic stirrer, reflux condenser, 3 constant...

Embodiment 2

[0033]The preparation method of the antiscaling dispersant that is used for circulating cooling water system of the present embodiment all the other are identical with embodiment 1, difference is:

[0034] In step ①, prepare initiator solution A liquid by dissolving 15 g of ammonium persulfate in 85 g of deionized water; initiator solution B liquid by dissolving 7.5 g of sodium bisulfite in 92.5 g of deionized water.

[0035] In step ③, when the temperature of the material in the five-necked flask rises to 75°C, add the liquid A, liquid B, and liquid C prepared in steps ① and ② dropwise at the same time.

Embodiment 3

[0037] The preparation method of the antiscaling dispersant that is used for circulating cooling water system of the present embodiment all the other are identical with embodiment 1, difference is:

[0038] Step 1. Initiator solution A prepared by dissolving 12.5 g of ammonium persulfate in 87.5 g of deionized water; initiator solution B by dissolving 10 g of sodium bisulfite in 90 g of deionized water.

[0039] In step ③, when the temperature of the material in the five-neck flask rises to 65°C, add liquid A, liquid B, and liquid C prepared in steps ① and ② dropwise at the same time.

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Abstract

The invention discloses a dirt dispersion agent for a circulating cooling water system and a preparation method of the dirt dispersion agent. The dirt dispersion agent is a terpolymer formed by copolymerizing three monomers such as maleic anhydride, allyl ether and hydroxyl compound by adopting an aqueous solution free radical polymerization method; the mass ratio of the maleic anhydride to the allyl ether to the hydroxyl compound is (1-1.5):(0.5-1):(0.2-0.5); the allyl ether is allyl polyoxyethylene ether, the hydroxyl compound is one or mixture of more than one of hydroxy-propyl acrylate, hydroxyethyl acrylate and sodium 3-allyloxy-2-hydroxy-1-propanesulfonate. The dirt dispersion agent disclosed by the invention is the terpolymer of maleic anhydride, allyl ether and hydroxyl compound, contains carboxy, ether and hydroxy functional groups; the dirt dispersion agent not only has excellent performance preventing calcium carbonate scale, calcium sulfate scale and calcium phosphate scale, but also has good zinc-stabilizing and ferric oxide dispersion capacity.

Description

technical field [0001] The invention relates to an industrial water treatment agent, in particular to a scale inhibitor dispersant used in a circulating cooling water system and a preparation method thereof. Background technique [0002] In the circulating cooling water system of industrial production, due to the increase of water temperature, the evaporation of water, the concentration of various inorganic ions and organic substances, the hardness, alkalinity and pH value of the circulating water naturally increase, and the alkaline earth metal cations contained in the water, such as Ca 2+ , Mg 2+ 、Ba 2+ and small amounts of other cations such as Fe 2+ , Fe 3+ 、Cu 2+ 、Al 3+ , Zn 2+ etc., will react with SO in water 4 2- , CO 3 2- 、HCO 3 - , OH - 、PO 4 3- , SiO 3 2- and other anions to form insoluble inorganic salts such as Ca 3 (PO4) 2 , Ca(CO 3 ) 2 , CaSO 4 , Mg(OH) 2 etc., depositing scale on the surface of pipes and heat exchangers, resulting in r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/12
Inventor 管敏锋邓晓虎
Owner CHANGZHOU KEWEI TIANSHI ENVIRONMENTAL TECH
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