Compound slow-release scale inhibitor

A scale inhibitor and slow-release technology, which is applied in the field of composite slow-release scale inhibitors, can solve the problems of complex production process, high scale inhibitor content, and high cost of composite slow-release scale inhibitors, and achieve good dispersion and corrosion resistance. The effect of speed reduction and low cost

Pending Publication Date: 2019-06-28
南京广全环保技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A composite slow-release antiscalant, comprising the following materials by weight:

[0025] 7.2 parts by weight of calcium tartrate, 6.3 parts by weight of benzotriazole, 2 parts by weight of polyaspartic acid, 6.5 parts by weight of polyacrylamide, 8.5 parts by weight of diethanol monoisopropanolamine, 28.4 parts by weight of water, 12.5 parts by weight of starch matrix Parts by weight, 5.3 parts by weight of hydroxyethylene diphosphonic acid, 6.1 parts by weight of modified chitosan, 7.5 parts by weight of polyphosphate;

[0026] Concrete preparation steps are as follows:

[0027] Step 1: Weigh calcium tartrate, benzotriazole, polyaspartic acid, polyacrylamide, diethanol monoisopropanolamine, water, starch matrix, hydroxyethylene diphosphonic acid, modified Chitosan and polyphosphate, spare;

[0028] Step 2: Add the hydroxyethylene diphosphonic acid, starch matrix and initiator in the step 1 into the reaction kettle and stir evenly, then heat to 80-90°C, and keep i...

Embodiment 2

[0038] A composite slow-release antiscalant, comprising the following materials by weight:

[0039] 8.7 parts by weight of calcium tartrate, 7.2 parts by weight of benzotriazole, 2.5 parts by weight of polyaspartic acid, 7.6 parts by weight of polyacrylamide, 9.5 parts by weight of diethanol monoisopropanolamine, 29.2 parts by weight of water, 13.6 parts by weight of starch matrix Parts by weight, 6.6 parts by weight of hydroxyethylene diphosphonic acid, 6.9 parts by weight of modified chitosan, 8.2 parts by weight of polyphosphate;

[0040] Concrete preparation steps are as follows:

[0041] Step 1: Weigh calcium tartrate, benzotriazole, polyaspartic acid, polyacrylamide, diethanol monoisopropanolamine, water, starch matrix, hydroxyethylene diphosphonic acid, modified Chitosan and polyphosphate, spare;

[0042] Step 2: Add the hydroxyethylene diphosphonic acid, starch matrix and initiator in the step 1 into the reaction kettle and stir evenly, then heat to 80-90°C, and keep...

Embodiment 3

[0052] A composite slow-release antiscalant, comprising the following materials by weight:

[0053]7.95 parts by weight of calcium tartrate, 6.75 parts by weight of benzotriazole, 2.25 parts by weight of polyaspartic acid, 7.05 parts by weight of polyacrylamide, 9 parts by weight of diethanol monoisopropanolamine, 28.8 parts by weight of water, 13.05 parts by weight of starch matrix Parts by weight, 5.95 parts by weight of hydroxyethylene diphosphonic acid, 6.5 parts by weight of modified chitosan, 7.85 parts by weight of polyphosphate;

[0054] Concrete preparation steps are as follows:

[0055] Step 1: Weigh calcium tartrate, benzotriazole, polyaspartic acid, polyacrylamide, diethanol monoisopropanolamine, water, starch matrix, hydroxyethylene diphosphonic acid, modified Chitosan and polyphosphate, spare;

[0056] Step 2: Add the hydroxyethylene diphosphonic acid, starch matrix and initiator in the step 1 into the reaction kettle and stir evenly, then heat to 80-90°C, and ...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C02F5/14
Inventor 魏新国陈峻
Owner 南京广全环保技术服务有限公司
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