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High-efficiency corrosion and scale inhibitor and preparation method thereof

A corrosion and scale inhibitor, high-efficiency technology, applied in chemical instruments and methods, descaling and water softening, complex/solubilizer treatment, etc., can solve problems such as narrow application range, achieve wide PH value application range, optimize The effect of low preparation process and production cost

Active Publication Date: 2015-08-26
CHANGSHU WATER TREATMENT AUX FACTORY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among these corrosion and scale inhibitors, organic phosphates have become the preferred species because of their dual effects of corrosion and scale inhibition. However, the existing organic phosphates are only suitable for water with a pH value between 6-9. too narrow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Preparation of organophosphorus: Pour 380 parts of ammonium persulfate into 50 parts of distilled water, stir until the ammonium persulfate is completely dissolved, and obtain the ammonium persulfate solution for subsequent use;

[0016] Open the valve of the distilled water head tank, put 160 parts of distilled water into the reaction kettle, start the reaction kettle to stir, and feed the jacket steam to make the temperature of the material in the reaction kettle rise to 70±2°C; Add acid anhydride and 480 parts of sodium hypophosphite into the reaction kettle, and stir until the maleic anhydride is completely dissolved; the temperature of the reaction kettle is raised to 95±2°C, and the ammonium persulfate solution flowmeter valve is opened, and the ammonium persulfate solution is added to the reaction The reaction is carried out in the kettle, and the temperature of the whole reaction is controlled at 90-95°C, and the flow rate of the ammonium persulfate solution is c...

Embodiment 2

[0020] Preparation of organophosphorus: Pour 400 parts of ammonium persulfate into 55 parts of distilled water, stir until the ammonium persulfate is completely dissolved, and obtain ammonium persulfate solution for subsequent use;

[0021] Open the valve of the distilled water head tank, put 170 parts of distilled water into the reaction kettle, start the reaction kettle to stir, and feed the jacket steam to make the temperature of the material in the reaction kettle rise to 70±2°C; Add acid anhydride and 490 parts of sodium hypophosphite into the reaction kettle and stir until the maleic anhydride is completely dissolved; the temperature of the reaction kettle is raised to 95±2°C, open the ammonium persulfate solution flow meter valve, and add the ammonium persulfate solution to the reaction The reaction is carried out in the kettle, and the temperature of the whole reaction is controlled at 90-95°C, and the flow rate of the ammonium persulfate solution is controlled to be 45...

Embodiment 3

[0025] Preparation of organophosphorus: Pour 420 parts of ammonium persulfate into 60 parts of distilled water, stir until the ammonium persulfate is completely dissolved, and obtain the ammonium persulfate solution for subsequent use;

[0026] Open the valve of the distilled water head tank, put 180 parts of distilled water into the reaction kettle, start the reaction kettle to stir, and feed the jacket steam to make the temperature of the reaction kettle material rise to 70±2°C; Acid anhydride and 500 parts of sodium hypophosphite are added to the reaction kettle, and stirred until the maleic anhydride is completely dissolved; the temperature of the reaction kettle is raised to 95±2°C, the ammonium persulfate solution flowmeter valve is opened, and the ammonium persulfate solution is added to the reaction The reaction is carried out in the kettle, and the temperature of the whole reaction is controlled at 90-95°C, and the flow rate of the ammonium persulfate solution is contr...

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Abstract

The invention discloses a high-efficiency corrosion and scale inhibitor. The high-efficiency corrosion and scale inhibitor comprises the following components by mass: 22 to 26% of polyol phosphate, 28 to 32% of organophosphorus, 20 to 24% of copolymer and 21 to 25% of zinc chloride. The pH value application scope of the high-efficiency corrosion and scale inhibitor is 3 to 12. Raw materials used for preparation of the organophosphorus comprise 250 to 300 parts of distilled water, 380 to 420 parts of maleic anhydride, 480 to 500 parts of sodium hypophosphate, 380 to 420 parts of ammonium persulfate and 80 to 100 parts of an additive. The preparation method for the high-efficiency corrosion and scale inhibitor comprises the following steps: preparation of the organophosphorus; and preparation of the corrosion and scale inhibitor. Thus, the high-efficiency corrosion and scale inhibitor has the characteristics of resistance to high hardness and a wide pH value application scope; and the preparation method is simple and has low production cost.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a high-efficiency corrosion and scale inhibitor and a preparation method thereof. Background technique [0002] Boilers are indispensable thermal equipment for iron and steel enterprises. In order to ensure the long-term, safe and economical operation of boilers, in addition to correct boiler operation and maintenance, the quality of boiler water and water treatment methods are particularly important. If the water quality of boiler water is poorly controlled or treated After a period of operation, a layer of solid deposits will appear on the heating surface in contact with water. This kind of attachment is due to the fact that the unqualified water is heated, evaporated, and concentrated during the operation of the boiler. After a series of physical and chemical changes, some insoluble salts will appear on the heating surface when the content of some insoluble salts exceeds the sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14C02F5/08
Inventor 陈建新殷建昌
Owner CHANGSHU WATER TREATMENT AUX FACTORY CO LTD
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