Efficient alkyl ether carboxylate type dirt dispersion agent and application thereof

Abstract

The invention relates to an alkyl ether carboxylate type dirt dispersion agent. The dirt dispersion agent contains carboxyl and ether group functional groups. The invention aims to provide an application of the dirt dispersion agent disclosed by the invention to an industrial water treatment system, particularly a circulating cooling water system. The invention aims to provide an application method of the dirt dispersion agent disclosed by the invention; when being used, the dirt dispersion agent can be used separately and can also be compounded with other dirt dispersion agents or corrosion inhibitors to be used. According to the alkyl ether carboxylate type dirt dispersion agent, the alkyl ether carboxylate has very high tolerance on calcium and has a good dirt dispersion effect on difficultly-dissolved salts including calcium carbonate dirt, calcium sulfate dirt, calcium phosphate dirt and the like in the water under the conditions of high hardness, high alkali, high temperature and high pH (Potential of Hydrogen); and the alkyl ether carboxylate type dirt dispersion agent has the advantages of safety in use, low toxicity, easiness for biological degradation and environmental friendliness, is applicable to automatic medicine adding control, and is convenient to use, and so on.

Description

technical field [0001] The invention relates to a chemical reagent for industrial water treatment and its application, more specifically to an alkyl ether carboxylate scale inhibitor and dispersant and its application in industrial circulating cooling water treatment. Background technique [0002] A serious problem often encountered in circulating cooling water systems is fouling deposition. Fouling mainly includes scale, metal oxides produced by corrosion and sediment scaling caused by sediment. Scale in cooling water is generally composed of slightly soluble salts such as calcium carbonate, calcium sulfate, calcium phosphate and calcium silicate (magnesium). The solubility of these salts is very small, and their solubility decreases with the increase of pH value and water temperature, so they are particularly easy to deposit on the heat transfer surface, affecting the normal heat transfer, reducing the efficiency of the heat exchanger, and consuming and wasting energy . ...

AI Technical Summary

Problems solved by technology

Commonly used scale inhibitors include natural dispersants (such as starch, tannin and lignin, etc.), phosphonates (such as ATMP, HEDP, EDTMPS, DTMPPA, PBTCA, etc.), organic phosphonates, polycarboxylic acids (such as PAA, HPMA, AA / AMPS, etc.), although these scale inhibitors and dispersants have solved the scaling problem of the circulating cooling water system to a certain extent, but there are still various defects, such as high hardness, high alkalinity, high pH It has poor scale and scale inhibitor dispersion performance under high temperature conditions, is not easy to biodegrade, will seriously pollute the environment, and has unsatisfactory compound performance with other corrosion and scale inhibitors, etc.