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Phosphorus-free corrosion-inhibition antiscalant used for industrial circulation cooling water

A circulating cooling water, phosphorus-free corrosion inhibition technology, applied in descaling and water softening, water/sludge/sewage treatment, osmosis/dialysis water/sewage treatment, etc., can solve the waste of natural mineral resources and unfavorable sustainable development , high cost and other problems, to achieve the effect of protecting the environment, avoiding eutrophication and heavy metal pollution, and solving severe corrosion and scaling of equipment and pipelines

Inactive Publication Date: 2010-05-05
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relationship between phosphorus-based chemicals and calcium hard ions, the performance of phosphorus-based chemicals in such ultra-low hardness water is not good, and water treatment is more difficult.
The existing treatment methods mainly include: mainly using metal salt corrosion inhibitors, supplemented by phosphorus-based agents, etc., due to the use of metal salt compounds in this method, the cost remains high and the pollution is serious. At the same time, it is also harmful to natural mineral resources. Waste is not conducive to sustainable development; or, by adding calcium chloride to increase the concentration of calcium ions to match the use of phosphorus-based formulas, this method will lead to eutrophication of the water body due to the high phosphorus content in the drug. cause environmental damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 12% of N-alkyl-N-fatty acylamino fatty acid salt solution with a concentration of 40%, 11% of a sodium lactobionate solution with a concentration of 50%, and acrylic acid-AMPS-methylpropanesulfonic acid copolymerization with a concentration of 30% Add 21% of the compound solution, 5% of sodium silicate, and 51% of water into the beaker in turn, and stir evenly to obtain the required corrosion and scale inhibitor.

Embodiment 2

[0021] 21% of N-alkyl-N-fatty acylamino fatty acid salt solution with concentration of 40%, 6% of zinc gluconate solution with concentration of 50%, 12% of polysuccinic acid solution with concentration of 30%, molybdic acid Add 1% sodium and 60% water to the beaker in sequence, and stir evenly to obtain the desired corrosion and scale inhibitor.

Embodiment 3

[0023] 5% of N-alkyl-N-fatty acylamino fatty acid salt solution with concentration of 40%, 22% of sodium malate solution with concentration of 50%, 16% of polymaleic acid solution with concentration of 30%, tungstic acid Add 4% sodium and 53% water into the beaker in sequence, and stir evenly to obtain the desired corrosion and scale inhibitor.

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PUM

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Abstract

The invention relates to a phosphorus-free corrosion-inhibition antiscalant used for industrial circulation cooling water treatment, which is characterized by comprising the following medicament components by weight: 10-40% of N-alkyl group-N-fat acyl amino fatty acid salt, 5-25% of hydroxy carboxylate, 5-20% of carboxylic acid copolymer, 1-4% of metal salt and the balance water.

Description

technical field [0001] The invention relates to industrial water treatment technology. It is a non-phosphorous organic formula corrosion and scale inhibitor used in circulating water system, especially suitable for reverse osmosis softening water system. This is natural water treated by reverse osmosis membrane to remove suspended substances, colloidal substances and dissolved polymer substances And most of the dissolved salts including calcium, magnesium ions, etc. obtained after the water. The water quality is characterized by ultra-low hardness, ultra-low alkalinity, and strong corrosion. Specifically, it relates to a phosphorus-free corrosion and scale inhibition formula containing hydroxy carboxylate, N-alkyl-N-fatty acylamino fatty acid salt, carboxylic acid copolymer and metal salt. Background technique [0002] Among all kinds of water, industrial water accounts for a high proportion, and it is an area with serious waste. The water reuse rate is only 30% in some pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12C02F1/44
Inventor 郑书忠陈军王超秦丽娟吴英艳陶蕾
Owner CHINA NAT OFFSHORE OIL CORP
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