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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 polyepoxysuccinic acid through maleic anhydride and ammonia-containing compounds, and further obtains polyaspartic acid. The agent has a good scale inhibition effect on various scaling components in the water treatment system, and has a good biodegradation performance, but its production cost is very high, it is not suitable for industrial production, and it is not suitable for water treatment with a large amount. field
Patent 104176837 discloses a kind of by hydrolysis maleic anhydride, itaconic acid 2-acrylamide-2-methylpropyl sulfonic acid (AMPS) and 2-acrylamide-2-methylpropylphosphonic acid (AMPP) three kinds A copolymer synthesized from monomers, the polymer contains a large number of carboxyl groups and some sulfonic acid groups. According to the experimental results, it has good scale inhibition performance and a certain corrosion inhibition effect, but the obtained product contains phosphine, which is easy to Pollution to water bodies, not conducive to the environment

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

Embodiment 1

[0033] 1) in parts by mass, in a reactor with a stirrer, a thermometer and a condensing device, add 60 parts of propenyl alcohol, 38 parts of maleic anhydride, 1 part of p-benzoquinone and 1 part of anhydrous cobalt chloride, After stirring evenly, raise the temperature to 50°C, keep it warm for 12 hours, and measure the conversion rate to over 95%, remove the condensation, and remove the small molecules under vacuum conditions to obtain the functional monomer.

[0034] 2) Under vacuum conditions, add 30 parts of functional monomers, 20 parts of maleic anhydride, 48 parts of tetrahydrofuran, and 2 parts of benzoyl peroxide into a closed reactor, heat up to 70 ° C, keep warm for 8 hours, and The reactants are dried under vacuum conditions, and unreacted monomers are washed away with a small amount of mixed solvent, and the washed products are dried and hydrolyzed with saturated sodium bicarbonate to obtain a hyperbranched polycarboxylic acid scale inhibitor.

Embodiment 2

[0036] 1) In parts by mass, in a reactor with a stirrer, a thermometer and a condensing device, add 55 parts of propylene alcohol, 43 parts of monoethyl maleate, 1 part of hydroquinone and 1 part of anhydrous silica gel , after stirring evenly, raise the temperature to 70°C, keep it warm for 10 hours, and measure the conversion rate to over 90% to remove the condensation, remove the small molecules under vacuum conditions, and obtain the functional monomer.

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

Embodiment 3

[0039] 1) In parts by mass, in a reactor with a stirrer, a thermometer and a condensing device, add 65 parts of hydroxyethyl acrylate, 33 parts of maleic anhydride, 1 part of p-benzoquinone and 1 part of anhydrous chlorinated Cobalt, after stirring evenly, raise the temperature to 60°C, keep it warm for 12 hours, and measure the conversion rate to be more than 95%, remove the condensation, and remove the small molecules under vacuum conditions to obtain the functional monomer.

[0040] 2) Under vacuum conditions, add 35 parts of functional monomers, 20 parts of monoethyl maleate, 43 parts of acetone, and 2 parts of di-tert-butyl hydroperoxide into the closed reactor, and heat up to 70°C , keep warm for 10h, dry the reactant under vacuum condition, wash off the unreacted monomer with a small amount of mixed solvent, dry the washed product, 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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