Scale inhibitor, and preparation method thereof

Abstract

The invention discloses a preparation method of a scale inhibitor. According to the preparation method, the scale inhibitor is prepared through copolymerization reaction of a monomer A and a monomer Bunder the action of a catalyst and an initiator; the initiator comprises an oxidizing agent and a reducing agent; the monomer A is at least one ingredient selected from itaconic acid, maleic anhydride, maleic acid, a monomethyl maleate, a monoethyl maleate, a monoisopropyl maleate, a isobutyl maleate, a mono-tert-butyl maleate, fumaric acid, monomethyl fumarate, monoethyl fumarate, and acomitic acid; and the monomer B is at least one selected from acrylic acid, methyl acrylate, ethyl acrylate, hydroxyethyl acrylate, hydroxy-propyl acrylate, methacrylic acid, hydroxyethyl methylacrylate, hydroxypropyl methacrylate, and vinyl acetate. The preparation method is simple in operation, and low in cost.

Description

technical field [0001] The invention relates to a preparation method of a scale inhibitor and the scale inhibitor. Background technique [0002] With the development of my country's economy, industrial water consumption is increasing year by year, and the demand for fresh water resources is also increasing year by year, and the problem of water conservation is becoming increasingly prominent. At present, circulating cooling water consumes the most in industrial water. In order to obtain fresh water, the concentration ratio of circulating cooling water must be increased. However, when increasing the concentration of circulating cooling water, a large amount of scale will be attached to the equipment and pipelines, which will not only affect the heat exchange but also cause corrosion. Therefore, it is necessary to use scale inhibitors to reduce the formation of scale. The scale inhibitors currently used are mainly phosphorus-based scale inhibitors or natural polymer scale inh...

AI Technical Summary

Problems solved by technology

Zhou Yuming, Liu Guangqing, etc. described the preparation and application effect of polyether scale inhibitors in CN103159333 and CN103145925, and their good effects in scale inhibition, corrosion inhibition and compatibility, etc., but did not discuss the biodegradation of the scale inhibitors. give specific data

The second type is polyamino acid, which has better biodegradability, such as polyaspartic acid (PASP) and polyepoxysuccinic acid (PESP), etc., can reach more than 80%. However, the scale inhibition effect of this type of scale inhibitor is not ideal, and the preparation process requirements and production cost are high, so this type of scale inhibitor is rarely used

Tian Caili, Chen Xiaochun, etc. introduced a biodegradable scale inhibitor obtained by copolymerization of aconitic acid and a small amount of acrylic acid in "Synthesis and Performance Research of New Green Scale Antiscalant AA-AA", but the aconitic acid used in it The acid is expensive and the yield of the prepared antiscalant is low