Compound corrosion and scale inhibitor and preparation method and application thereof

A technology of corrosion and scale inhibitors and zinc compounds, which is applied in the field of composite corrosion and scale inhibitors and its preparation, can solve the problem of turbidity caused by composite corrosion and scale inhibitors, which affects the normal addition of chemicals, and cannot guarantee the water treatment effect of circulating water systems and other problems, to achieve the effect of excellent corrosion and scale inhibition effect

Active Publication Date: 2017-06-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The commonly used green and environmentally friendly composite corrosion and scale inhibitors are usually obtained by directly mixing zinc salts, organic phosphonates, polyepoxysuccinic acid and sulfonate copolymers, and the composite corrosion and scale inhibitors prepared thus The agent tends to be turbid, and deposits will form after standing for a period of time, w

Method used

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  • Compound corrosion and scale inhibitor and preparation method and application thereof
  • Compound corrosion and scale inhibitor and preparation method and application thereof

Examples

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preparation example Construction

[0013] The invention provides a preparation method of a composite corrosion and scale inhibitor, the method comprising: mixing an aqueous solution containing polyepoxysuccinic acid and an inorganic acid solution, stirring evenly, standing still, taking the supernatant after precipitation is formed, and The supernatant is compounded with one or more selected from hydrolyzed polymaleic anhydride, organic phosphonic acid corrosion and scale inhibitors, sulfonic acid copolymers and zinc-containing compounds.

[0014] In the method of the present invention, those skilled in the art should understand that the aqueous solution containing polyepoxysuccinic acid is an aqueous solution prepared by dissolving polyepoxysuccinic acid in water. In order to improve the corrosion and scale inhibition effect of the prepared composite corrosion and scale inhibitor, preferably, based on the effective concentration of polyepoxysuccinic acid, the mass fraction of the aqueous solution containing pol...

Embodiment 1

[0037] This example is used to illustrate the composite corrosion and scale inhibitor of the present invention and its preparation method.

[0038] With 41.7g, the commercial solution that mass fraction is 30% polyepoxysuccinic acid is dissolved in 8.3g deionized water, stirring and dissolving is mixed with polyepoxysuccinic acid aqueous solution, adds the hydrochloric acid solution of 36.5 mass % to make polyepoxysuccinic acid The pH value of solution is 1.0, after stirring evenly, leave standstill for 4 hours, filter, get 24g filtrate and add 12g hydrolyzed polymaleic anhydride, 8g 2-hydroxyphosphinoacetic acid, 24g acrylic acid / allylsulfonic acid copolymer (purchased From Changzhou Wujin Huadong Chemical Co., Ltd., the trade mark is H-28), 5g of zinc chloride and 27g of deionized water, and stir to obtain 100g of composite corrosion and scale inhibitors.

Embodiment 2

[0043] This example is used to illustrate the composite corrosion and scale inhibitor of the present invention and its preparation method.

[0044] With 33.3g, the commercial solution that mass fraction is 30% polyepoxysuccinic acid is dissolved in 16.7g deionized water, stirring and dissolving is mixed with polyepoxysuccinic acid aqueous solution, adds the sulfuric acid solution of 98 mass % to make polyepoxysuccinic acid The pH value of the aqueous solution is 0. After stirring evenly, let it stand for 15 hours, filter, take 30g of the filtrate and add 12g of hydrolyzed polymaleic anhydride, 6g of 1-hydroxyethyl-1,1-diphosphonic acid, 24g of acrylic acid / 2- Acrylamide-2'-methylpropyl sulfonic acid copolymer (purchased from Beijing Linhua Water Quality Stabilizer Factory, brand name is ZF-329LH), 10g of zinc sulfate and 18g of deionized water, stirred evenly to obtain 100g of composite corrosion inhibitor detergent.

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Abstract

The invention relates to the field of circulating water treatment and discloses compound corrosion and scale inhibitor and a preparation method and application thereof. The method comprises the steps of mixing water solution containing polyepoxysuccinic acid with inorganic acid solution, evenly stirring, standing, taking liquid supernatant after precipitation forms and complexing the liquid supernatant with one or more of hydrolytic polymaleic anhydride, organic phosphonic acid corrosion and scale inhibitor, sulfonic acid copolymer and zinc-contained compound. The preparation method disclosed by the invention can solve the problem that prepared compound corrosion and scale inhibitor generates turbidness and precipitation and can guarantee that the compound corrosion and scale inhibitor has an excellent corrosion and scale inhibition effect.

Description

technical field [0001] The invention relates to the field of circulating water treatment, in particular to a composite corrosion and scale inhibitor and its preparation method and application. Background technique [0002] Composite corrosion and scale inhibitors are composed of corrosion inhibitors and scale inhibitors and dispersants. According to the water quality of the treated circulating water, composite corrosion and scale inhibitors usually contain a variety of corrosion inhibitors and scale inhibitors. According to the chemical composition of corrosion inhibitors, it can be divided into inorganic corrosion inhibitors and organic corrosion inhibitors, among which inorganic corrosion inhibitors are mainly zinc salts, molybdates, tungstates, silicates, nitrites, polyphosphates, etc. . Organic corrosion inhibitors are mainly organic phosphonates and natural organic polymers. Due to the requirements of environmental protection, corrosion inhibitors for water treatment ...

Claims

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Application Information

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IPC IPC(8): C02F5/10C02F5/14
Inventor 王金华余正齐李本高
Owner CHINA PETROLEUM & CHEM CORP
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