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A kind of carboxyl-terminated hyperbranched polymer scale inhibitor and its preparation method and application

A hyperbranched polymer and antiscalant technology, applied in the field of antiscalants, can solve the problems of large amount of use, great influence of pH, and difficulty in application prospects, etc., and achieve the effect of reducing the amount of use and having a wide range of pH applications

Active Publication Date: 2021-03-26
SOUTHWEST UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, existing technologies including the above-mentioned studies have the disadvantages of excessive usage and great influence of pH, and it is difficult to have practical and good application prospects.

Method used

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  • A kind of carboxyl-terminated hyperbranched polymer scale inhibitor and its preparation method and application
  • A kind of carboxyl-terminated hyperbranched polymer scale inhibitor and its preparation method and application
  • A kind of carboxyl-terminated hyperbranched polymer scale inhibitor and its preparation method and application

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Embodiment 1

[0026] (1) According to the mole ratio of acrylonitrile and ethylene glycol 2.1, place acrylonitrile in a mixed solution of sodium hydroxide (40wt%) and ethylene glycol to react at 0-5°C, neutralize with dilute hydrochloric acid solution, dissolve in Ethyl acetate; then use distilled water to wash the organic phase for more than 3 times, use anhydrous magnesium sulfate to dry and concentrate, add excess ethanol to the concentrate, and reflux in the presence of concentrated sulfuric acid until the resultant does not contain CN bonds;

[0027] (2) Process the product of step (1) successively with dichloromethane, saturated sodium bicarbonate, distilled water, aqueous sodium chloride solution, and distilled water, and then use anhydrous magnesium sulfate to dry;

[0028] (3) Dissolve the product of step (2) and tris(hydroxymethyl)aminomethane in a molar ratio of 1 in DMSO solution, and add excess anhydrous potassium carbonate to react for 15 hours at 25°C; remove Anhydrous potass...

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Abstract

The invention provides a carboxyl terminated hyperbranched polymer scale inhibitor. The chemical structural formula of the scale inhibitor is shown as formula (1). The invention further provides a preparation method and application of the scale inhibitor. Compared with existing hyperbranched polymer scale inhibitors, the scale inhibitor has the advantages that the usage amount is obviously reduced, and when the calcium ion molarity is 2,000 mol / L, and the usage amount of the scale inhibitor is 10 mg / L, the scale inhibiting ratio can reach 85% or above; the pH application range of the carboxylterminated hyperbranched polymer scale inhibitor is wide, and when pH value is equal to 6-9, the scale inhibiting ratio can reach 80% or above. The formula is shown in the description.

Description

technical field [0001] The invention belongs to the technical field of scale inhibitors, in particular to a carboxyl-terminated hyperbranched polymer scale inhibitor and its preparation method and application. Background technique [0002] In the daily or production process, the generation of scale will affect people's life and production quality, especially affect the operating performance of production equipment and increase production costs. Common scale components are calcium carbonate and barium sulfate, which have an important impact on petrochemical, seawater desalination and other industries. [0003] Due to the higher and higher environmental protection requirements, the application of phosphorus-containing scale inhibitors has been greatly restricted. Therefore, it is an industry trend to develop highly efficient phosphorus-free scale inhibitors. [0004] At present, among the phosphorus-free scale inhibitors, maleic anhydride-based scale inhibitors have been mor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/12
CPCC02F5/12
Inventor 陈华林丁克毅刘军
Owner SOUTHWEST UNIVERSITY FOR NATIONALITIES