Preparation method for hyperbranched polycarboxylic acid polymer scale inhibitor

A technology of antiscalant and polycarboxylic acid, applied in chemical instruments and methods, descaling and water softening, special treatment targets, etc., can solve the problem of low maleic acid activity, unsuitability for industrial production, and high experimental control conditions and other problems, to achieve excellent scale inhibition performance, high scale inhibition effect, and improve the effect of scale inhibition performance

Inactive Publication Date: 2016-08-03
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN101041516 discloses a preparation method of a high-efficiency maleic anhydride-based polymer scale inhibitor, which uses polycondensation to synthesize hyperbranched polyesters, polyethers or polyamides with unsaturated bonds, and then uses maleic anhydride Copolymerization and modification of acid anhydride can obtain hyperbranched polymers containing peripheral carboxyl groups, which have good scale inhibition performance, but the pre-synthesis conditions are relatively harsh, and the modification process is easy to cross-link
Patent CN102040287 discloses a scale inhibitor formed by radical polymerization of maleic acid, acrylic acid, and isopropyl acrylate. The scale inhibitor has the advantages of excellent performance and low cost, but the activity of maleic acid is relatively low. Low, not easy to copolymerize, need higher experimental control conditions
Patent CN102146161 discloses a polyaspartic acid composition used as a scale inhibitor. The composition obtains

Method used

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  • Preparation method for hyperbranched polycarboxylic acid polymer scale inhibitor
  • Preparation method for hyperbranched polycarboxylic acid polymer scale inhibitor
  • Preparation method for hyperbranched polycarboxylic acid polymer scale inhibitor

Examples

Experimental program
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Effect test

Example Embodiment

[0032] Example 1:

[0033] 1) In parts by mass, in a reactor equipped with a stirrer, a thermometer and a condenser, add 60 parts of allyl alcohol, 38 parts of maleic anhydride, 1 part of terephthaloquinone and 1 part of anhydrous cobalt chloride, After stirring uniformly, the temperature is raised to 50°C, and the temperature is kept for 12 hours. The conversion rate is determined to be more than 95%. The condensation is removed, and the small molecules are removed under vacuum to obtain the functional monomer.

[0034] 2) Add 30 parts of functional monomers, 20 parts of maleic anhydride, 48 parts of tetrahydrofuran, 2 parts of benzoyl peroxide in a closed reactor under the condition of passing a vacuum, heat up to 70℃, keep for 8h, The reactants are dried under vacuum conditions, and then a small amount of mixed solvent is used to wash away unreacted monomers. After the washed product is dried, it is hydrolyzed with saturated sodium bicarbonate to obtain a hyperbranched polycarbo...

Example Embodiment

[0035] Example 2:

[0036] 1) In parts by mass, add 55 parts of propenol, 43 parts of monoethyl maleate, 1 part of hydroquinone and 1 part of anhydrous silica gel in a reactor equipped with a stirrer, thermometer and condenser. After stirring, the temperature is raised to 70°C and the temperature is kept for 10 hours. The conversion rate is determined to be more than 90%. Remove the condensation, and remove the small molecules under vacuum to obtain the functional monomer.

[0037] 2) Under vacuum conditions, add 32 parts of functional monomer, 18 parts of maleic anhydride, 47 parts of tetrahydrofuran, 3 parts of benzoyl peroxide into a closed reactor, heat up to 70℃, keep for 8h, The reactants are dried under vacuum conditions, and then a small amount of mixed solvent is used to wash away unreacted monomers. After the washed product is dried, it is hydrolyzed with saturated sodium bicarbonate to obtain a hyperbranched polycarboxylic acid scale inhibitor.

Example Embodiment

[0038] Example 3:

[0039] 1) Add 65 parts of hydroxyethyl acrylate, 33 parts of maleic anhydride, 1 part of terephthaloquinone and 1 part of anhydrous chlorinated to a reactor equipped with a stirrer, a thermometer and a condenser according to parts by mass After stirring the cobalt, the temperature is raised to 60°C and kept for 12 hours. The conversion rate is determined to be more than 95%. The condensation is removed, and the small molecules are removed under vacuum to obtain the functional monomer.

[0040] 2) Under vacuum conditions, add 35 parts of functional monomer, 20 parts of monoethyl maleate, 43 parts of acetone, and 2 parts of di-tert-butyl hydroperoxide into a closed reactor, and heat to 70°C. ,Incubate for 10h, dry the reactants under vacuum conditions, then wash away unreacted monomers with a small amount of mixed solvent, dry the washed products, and hydrolyze with saturated sodium bicarbonate to obtain hyperbranched polycarboxylic acid scale inhibition Agent.

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Abstract

The invention is a preparation method for a hyperbranched polycarboxylic acid polymer scale inhibitor. The scale inhibitor has good scale inhibition property for calcium carbonate, calcium phosphate, calcium sulfate, barium sulfate, strontium sulfate and so on, and has high tolerability for calcium ion. Moreover, the scale inhibitor has no affection on water quality, has characteristics of simple synthetic technology, small amount and the like, and can be used for processing industrial water with complex scale and high scale-forming ion concentration.

Description

technical field [0001] The invention relates to a preparation method of a hyperbranched polycarboxylic acid polymer scale inhibitor, belonging to the technical field of scale inhibition and scale prevention in industrial water treatment. Background technique [0002] In recent years, with the strengthening of environmental protection and the further deepening of the contradiction between supply and demand of water resources, rational use of water resources has become very important. Industrial water accounts for a considerable proportion of the domestic water used in the whole society. A large amount of water is needed in industrial production. Untreated water contains a large amount of alkaline earth metal cations such as calcium, magnesium, barium, strontium, etc. Due to changes in the external environment, the cations in the water are precipitated in the form of carbonates, sulfates, etc. When the insoluble inorganic salt precipitates and deposits on the surface of the e...

Claims

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Application Information

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IPC IPC(8): C08F222/16C08F222/06C08F220/18C08F220/28C08F220/06C02F5/10
CPCC02F5/10C08F222/16C02F2303/22C08F220/281C08F222/06C08F220/18C08F220/06
Inventor 陈华林黄衡恢刘白玲罗荣单宁
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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