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Phosphorus-free scale and corrosion inhibitor and preparation method thereof

A phosphorus-free scale and corrosion inhibitor technology, used in chemical instruments and methods, scale removal and water softening, water/sludge/sewage treatment, etc., can solve problems such as destroying the ecological balance of water bodies, and achieve scale and corrosion inhibition. Excellent effect, excellent scale inhibition, excellent corrosion inhibition effect

Active Publication Date: 2014-11-19
SHANDONG JICHANG ENVIRONMENTAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the scale and corrosion inhibitors used in industrial circulating water are still based on phosphorus-containing formulas, but the use of phosphorus-containing compounds leads to eutrophication of water quality, which promotes the excessive reproduction of microorganisms, especially algae, and the rate of organic matter production far exceeds the rate of consumption. , the accumulation of organic matter in the water body will destroy the ecological balance of the water body

Method used

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  • Phosphorus-free scale and corrosion inhibitor and preparation method thereof
  • Phosphorus-free scale and corrosion inhibitor and preparation method thereof
  • Phosphorus-free scale and corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 50kg of acrylamide and 80kg of diallyldimethylammonium chloride into the reactor in sequence, start stirring, raise the temperature to 70°C, add 1kg of potassium persulfate in proportion, react for 3 hours, and then add 20kg of hexamethylene tetra Amine, keep warm for 2 hours, after the reaction is over, cool down to room temperature, then add 50Kg of hydrolyzed polymaleic anhydride, 10kg of benzotriazole and 789kg of deionized water in sequence, and stir for 20min to obtain the product.

Embodiment 2

[0021] Add 75kg of acrylamide and 100kg of diallyldimethylammonium chloride into the reactor in sequence, start stirring, raise the temperature to 75°C, add 2.5kg of potassium persulfate in proportion, react for 3.5 hours, and then add 25kg of hexamethylene Tetramine, keep warm for 2.5 hours, after the reaction is finished, cool down to room temperature, then add 75Kg of hydrolyzed polymaleic anhydride, 15kg of benzotriazole and 707.5kg of deionized water in sequence, and stir for 25min to obtain the product.

Embodiment 3

[0023] Add 100kg of acrylamide and 120kg of diallyldimethylammonium chloride into the reactor in sequence, start stirring, raise the temperature to 80°C, add 5kg of potassium persulfate in proportion, react for 4 hours, and then add 30kg of hexamethylene tetra Amine, keep warm for 3 hours, after the reaction is finished, cool down to room temperature, then add 100kg of hydrolyzed polymaleic anhydride, 20kg of benzotriazole and 625kg of deionized water in sequence, and stir for 30min to obtain the product.

[0024] Effect:

[0025] Case number one:

[0026] A power plant in Shenyang, Liaoning uses reclaimed water as circulating water to replenish water. The water quality analysis is shown in Table 1.

[0027] Table 1 Water quality analysis form of a power plant in Shenyang

[0028]

[0029] From the data in Table 1, it can be seen that the replenishment water of this system is of medium hardness and low alkalinity water quality. If it is operated at a higher concentration ...

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Abstract

The invention belongs to the technical field of water treatment and particularly relates to a phosphorus-free scale and corrosion inhibitor and preparation method thereof. The phosphorus-free scale and corrosion inhibitor is prepared from following raw material comprising, by weight, 5-10% of acrylamide, 8-12% of diallyldimethylammonium chloride, 0.1-0.5% of potassium persulfate, 2-3% of hexamethylene tetramine, 5-10% of hydrolytic polymaleic anhydride, 1-2% of benzotriazole and the balance deionized water. The preparation method includes following steps: filling a reaction kettle with the acrylamide and the diallyldimethylammonium chloride according to a proportion, starting a stirring operation, increasing a temperature to 70-80 DEG C, adding the potassium persulfate according to the proportion, carrying out a reaction for 3-4 hours, adding the hexamethylene tetramine according to the proportion, maintaining the temperature for 2-3 hours, decreasing the temperature to room temperature after the reaction being finished, successively adding the hydrolytic polymaleic anhydride, the benzotriazole and the deionized water according to the proportion, and performing a stirring operation for 20-30 min to obtain the phosphorus-free scale and corrosion inhibitor. The scale and corrosion inhibitor is free of phosphorus compounds and zinc salts, is free of environmental pollution and is excellent in a scale and corrosion inhibiting effect.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a phosphorus-free scale and corrosion inhibitor and a preparation method thereof. Background technique [0002] At present, the scale and corrosion inhibitors used in industrial circulating water are still based on phosphorus-containing formulas, but the use of phosphorus-containing compounds leads to eutrophication of water quality, which promotes the excessive reproduction of microorganisms, especially algae, and the rate of organic matter production far exceeds the rate of consumption. , the accumulation of organic matter in the water body will destroy the ecological balance of the water body. With the enhancement of people's awareness of environmental protection, water eutrophication has attracted people's attention, and now many countries and regions have introduced regulations to limit the discharge of phosphorus-containing wastewater. my country has al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12
Inventor 鲁登强王华翟金义鲁峻岐
Owner SHANDONG JICHANG ENVIRONMENTAL ENG CO LTD
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