Preparation method of multiple-effect compound type corrosion and scale inhibitor

A corrosion and scale inhibitor, composite technology, applied in the preparation of phosphorus-free, barium-strontium composite corrosion and scale inhibitors, biodegradable green environmental protection corrosion and scale inhibitors, can solve the problem of narrow application range, barium Strontium has problems such as poor scale inhibition effect and weak scale inhibition ability, and achieves the effect of less dosage, good product stability and strong scale inhibition ability

Inactive Publication Date: 2012-12-26
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the scale inhibitors commonly used in domestic oil fields mainly include organic phosphates, polymers, and composites of organic phosphates and polycarboxylates. , The application number is 200610012917.9 "Biodegradable composite corrosion and scale inhibitors and its preparation method", most of these scale inhibitors have better scale inhibition effect on calcium, but relatively poor scale inhibition effect on barium strontium. At present, for barium strontium strontium There are polymers and composites, such as: application number 200910198929.9 "a water quality scale inhibitor containing barium and strontium", application number 201010144967.9 "a scale inhibitor for pre...

Method used

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  • Preparation method of multiple-effect compound type corrosion and scale inhibitor

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Embodiment 1

[0016] (1) Synthesis of itaconic acid-maleic acid-acrylic acid-methyl acrylate polymer: It is characterized in that in the reactor, add 13g itaconic acid, 35g maleic anhydride, add 50mL water, stopper, stir, and keep the temperature at 50°C , dissolve, react 40mim;

[0017] (2) Mix 25mL of acrylic acid and 30mL of methyl acrylate evenly, then dissolve 3g of ammonium persulfate in 12mL of water and add to the above solution. In the solution, after the dropwise addition, raise the temperature to 70°C for constant temperature reaction for 2 hours, then raise the temperature to 85°C for constant temperature reaction for 4 hours, cool to about 50°C, and use 50% sodium hydroxide solution to adjust the pH to be weakly alkaline. The obtained yellow transparent viscous liquid is itaconic acid-maleic acid-acrylic acid-methyl acrylate polymer;

[0018] (3) Add 10mL polyepoxysuccinic acid, 5mL ethylenediamine tetramethylene phosphoric acid, 15mL itaconic acid-maleic acid-acrylic acid-met...

Embodiment 2

[0020] (1) Synthesis of itaconic acid-maleic acid-acrylic acid-methyl acrylate polymer: It is characterized in that in the reactor, add 25g itaconic acid, 30g maleic anhydride, add 60mL water, stopper, stir, and keep the temperature at 55°C , dissolve, react 30mim;

[0021] (2) Mix 35mL of acrylic acid and 45mL of methyl acrylate evenly, then dissolve 5g of ammonium persulfate in 15mL of water and add to the above solution. In the solution, after the dropwise addition, raise the temperature to 75°C for constant temperature reaction for 2 hours, then raise the temperature to 90°C for constant temperature reaction for 4 hours, cool to about 50°C, and adjust the pH to weak alkaline with 50% sodium hydroxide solution. The obtained yellow transparent viscous liquid is itaconic acid-maleic acid-acrylic acid-methyl acrylate polymer;

[0022] (3) Add 20mL polyepoxysuccinic acid, 10mL ethylenediaminetetramethylene phosphoric acid, 25mL itaconic acid-maleic acid-acrylic acid-methyl acr...

Embodiment 3

[0024] (1) Synthesis of itaconic acid-maleic acid-acrylic acid-methyl acrylate polymer: It is characterized in that in the reactor, add 10g itaconic acid, 35g maleic anhydride, add 35mL water, stopper, stir, and keep the temperature at 50°C , dissolve, react 60mim;

[0025] (2) Mix 20mL of acrylic acid and 30mL of methyl acrylate evenly, then dissolve 4g of ammonium persulfate in 12mL of water and add to the above solution. In the solution, after the dropwise addition, raise the temperature to 75°C for 1.5 hours, then raise the temperature to 90°C for 5 hours, cool to about 50°C, and adjust the pH to weak alkaline with 50% sodium hydroxide solution , the obtained yellow transparent viscous liquid is itaconic acid-maleic acid-acrylic acid-methyl acrylate polymer;

[0026] (3) Add 20mL polyepoxysuccinic acid, 12mL ethylenediamine tetramethylene phosphoric acid, 35mL itaconic acid-maleic acid-acrylic acid-methyl acrylate polymer and 10mL dendritic polyamide-amine to the reactor,...

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Abstract

The invention discloses a preparation method of a multiple-effect compound type corrosion and scale inhibitor. The preparation method is characterized in that the scale inhibitor is of a compound type and comprises the following components in percent by volume: 22%-32% of polyepoxysuccinic acid, 10%-18% of ethylenediamine tetramethylene phosphonic acid, 35%-50% of itaconic acid-maleic acid-crylic acid-methyl acrylate polymer, 10%-18% of tree-shaped polyamide-amine, and the balance of water, and sodium hydroxide is used for adjusting the pH. The invention also discloses the multiple-effect compound type corrosion and scale inhibitor which has an excellent scale inhibiting effect on BaSO4, SrSO4, CaCO3, MgCO3, SiO2 and Ca3(PO4)2, also has the characteristics of corrosion inhibiting performance, high temperature resistance, good stability and the like, and have no three-waste emission in the whole production process. The preparation method for treating complex water quality disclosed by the invention has the advantages of simple scale inhibiting process, low agent using amount, low cost and good effect, and has better economic benefit and wide social benefit.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and specifically relates to a preparation method of a barium-strontium composite corrosion and scale inhibitor, which belongs to a phosphorus-free, biodegradable, green and environment-friendly corrosion and scale inhibitor, and is used for corrosion and scale inhibition of water quality deal with. Background technique [0002] In recent years, the rapid economic development has led to a rapid increase in the demand for oil and gas. However, most of the oil and gas fields today have entered the middle and late stages, and oil field scaling has become a major problem that plagues the production of oil and gas fields. Oil and gas field water scaling has two notable features: (1) high calcium content, the content of bicarbonate and calcium ions in petroleum wastewater is usually more than five times the calcium content in cooling circulating water, so it is easy to produce a large amo...

Claims

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Application Information

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IPC IPC(8): C02F5/10C08F222/06C08F222/02C08F220/06C08F220/14
Inventor 李慧芝许崇娟庄海燕李冬梅
Owner UNIV OF JINAN
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