Compound slow-release scale inhibitor

Abstract

The invention discloses a compound slow-release scale inhibitor. The compound slow-release scale inhibitor specifically comprises the following preparation steps that 1, calcium tartrate, benzotriazole, polyaspartic acid, polyacrylamide, diethanolisopropanolamine, water, a starch matrix, 1-hydroxyethylidene-1,1-diphosphonic acid, modified chitosan and polyphosphates are weighed by corresponding weight for use; 2, the 1-hydroxyethylidene-1,1-diphosphonic acid, the starch matrix and an initiator in step 1 are added into a reaction kettle to be stirred uniformly, then heating is conducted to reach 80-90 DEG C, and heat preservation is conducted for 15-18 minutes; 3, the calcium tartrate, the benzotriazole, the polyaspartic acid, the polyacrylamide and water in step 1 are stirred and dissolveduniformly, and an water phase of the non-phosphorus compound slow-release scale inhibitor is obtained. According to the compound slow-release scale inhibitor preparation method, the process is simple, energy conservation and environmental friendliness are achieved, the manufacturing cost is low, the practicability is high, and the method is suitable for wide application and popularization.

Description

technical field [0001] The invention belongs to the technical field of scale inhibitor production, and in particular relates to a composite slow-release scale inhibitor. Background technique [0002] Scale inhibitors are a class of agents that can disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on metal surfaces, and maintain good heat transfer effects on metal equipment. Alkali metal salts of orthophosphoric acid are commonly used as existing antiscalants. However, this dosage method may cause the content of antiscalant to be too high in the early stage, and in the later stage, it may happen that the antiscalant has been exhausted before the next feeding, resulting in Scaling occurs, and the existing composite slow-release antiscalant has complicated production process, is difficult to operate, has high cost and poor practicability. Contents of the invention [0003] The purpose of the pres...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a composite slow-release scale inhibitor to solve the problem that the existing scale inhibitors proposed in the above background technology usually use alkali metal salts of orthophosphoric acid. However, this dosing method may cause scale inhibition in the early stage. The antiscalant content is too high, and in the later period, it may happen that the antiscalant is exhausted before the next feeding, resulting in scaling. Moreover, the existing composite slow-release antiscalant has a complicated production process, is not easy to operate, and has a high cost. The problem of poor usability