Phosphorus-free corrosion and scale inhibitor composition, phosphorus-free corrosion and scale inhibitor and application of phosphorus-free corrosion and scale inhibitor

A corrosion and scale inhibitor, phosphorus-free corrosion inhibition technology, applied in descaling and water softening, chemical instruments and methods, water/sludge/sewage treatment, etc. The amount of etchant and the increase in cost of use can achieve the effect of saving cost, reducing dosage and reducing usage.

Active Publication Date: 2019-07-30
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The formulations of corrosion and scale inhibitors used in cooling water treatment in my country are basically based on phosphorus-based formulations. Although the performance can basically meet the requirements for use, there are still deficiencies in phosphorus-based formulations: phosphorus-based water treatment agents are used in the process of using There is a hidden danger of easy formation of phosphate scale, which affects the heat exchange effect of the water cooler during long-term operation; the phosphorus formula promotes the reproduction of microorganisms in the circulating water, and consumes a large amount of fungicides; the discharge of a large amount of phosphorus can easily lead to eutrophication of the receiving water
Both acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid copolymer can promote corrosion. In order to offset the increased corrosion of these substances, the amount of corrosion inhibitor in the formula must be increased, resulting in increased use costs

Method used

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  • Phosphorus-free corrosion and scale inhibitor composition, phosphorus-free corrosion and scale inhibitor and application of phosphorus-free corrosion and scale inhibitor
  • Phosphorus-free corrosion and scale inhibitor composition, phosphorus-free corrosion and scale inhibitor and application of phosphorus-free corrosion and scale inhibitor
  • Phosphorus-free corrosion and scale inhibitor composition, phosphorus-free corrosion and scale inhibitor and application of phosphorus-free corrosion and scale inhibitor

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preparation example Construction

[0018] Wherein, the preparation method of allyloxypolyethylene glycol maleate monoester (APEM) comprises: under esterification condition, maleic anhydride is mixed with allyloxypolyethylene glycol, carries out esterification reaction, obtains Allyloxypolyoxyglycol monomaleate (APEM). The esterification reaction conditions generally include reaction temperature and reaction time, wherein, from the perspective of promoting the esterification reaction and improving reaction efficiency in balance, the reaction temperature may be 70-120°C, more preferably 80-100°C, The reaction time can be 1-6h. The ratio of the amount of maleic anhydride to allyloxypolyethylene glycol is preferably 1:0.9-1.1.

[0019] Wherein, the preparation method of allyloxypolyethylene glycol sulfonate (APES) comprises: under the condition of esterification, sulfamic acid is mixed with allyloxypolyethylene glycol, carries out esterification reaction, obtains allyl Oxypolyethylene glycol sulfonate (APES). Th...

Embodiment 1

[0065] Take by weighing 4.8g zinc chloride and place in the 250mL beaker, add 39.4g deionized water, after stirring and dissolving, add 30gMA-APES-APEM (weight average molecular weight 2000), 22.5g HPMA (product number LH-10), and 3.3g ascorbic acid, stir well.

Embodiment 2

[0067] Weigh 7.9g of zinc sulfate and place it in a 250mL beaker, add 29g of deionized water, stir and dissolve, then add 20g of MA-APEM-APES (weight average molecular weight 10000), 37.5g of PASP (product number HL-157) and 5.6g of deionized water hydroascorbic acid, stir well.

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Abstract

The invention relates to the field of corrosion and scale inhibitors and discloses a phosphorus-free corrosion and scale inhibitor composition. The composition comprises a polymer A, a polymer B, organic acid and/or organic acid salt and water-soluble inorganic zinc salt; the polymer A is a copolymer of maleic anhydride, allyloxy polyethylene glycol maleic acid monoester and allyloxy polyethyleneglycol sulfonate, and the polymer B is a corrosion inhibition polymer; the weight ratio of the polymer A to the polymer B to the organic acid and/or organic acid salt to the water-soluble inorganic zinc salt is 1:(0.3-6.67):(0.025-1.25):(0.05-1.6). The invention further provides a phosphorus-free corrosion and scale inhibitor and application thereof. According to the phosphorus-free corrosion andscale inhibitor composition, the application amount of the corrosion and scale inhibitor is effectively lowered, and the cost is greatly reduced.

Description

technical field [0001] The invention relates to a phosphorus-free corrosion and scale inhibitor composition, a phosphorus-free corrosion and scale inhibitor and applications thereof. Background technique [0002] The formulations of corrosion and scale inhibitors used in cooling water treatment in my country are basically based on phosphorus-based formulations. Although the performance can basically meet the requirements for use, there are still deficiencies in phosphorus-based formulations: phosphorus-based water treatment agents are used in the process of using There is a hidden danger of easy formation of phosphate scale, which affects the heat exchange effect of the water cooler during long-term operation; the phosphorus formula promotes the reproduction of microorganisms in the circulating water, and consumes a large amount of fungicides; the discharge of a large amount of phosphorus can easily lead to eutrophication of the receiving water. Therefore, the development and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10
CPCC02F5/105
Inventor 余正齐王金华孙飞
Owner CHINA PETROLEUM & CHEM CORP
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