Hyperbranched scale-inhibiting polymer as well as preparation method and application thereof

A technology of hyperbranched polyether and polymer, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. Scale inhibition performance decline and other problems, to achieve the effect of eliminating easy hydrolysis, long duration, mild experimental conditions

Active Publication Date: 2018-09-07
SOUTHWEST UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hyperbranched polymers synthesized in the above patents all contain ester bonds, which are prone to hydrolysis in water, especially under harsh conditions such as high temperature and high pressure, resulting in the breakage of the ester groups, and the molecular weight and branching degree of the polymers are reduced. , the scale inhibition performance also dropped significantly

Method used

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  • Hyperbranched scale-inhibiting polymer as well as preparation method and application thereof
  • Hyperbranched scale-inhibiting polymer as well as preparation method and application thereof
  • Hyperbranched scale-inhibiting polymer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The preparation method of hyperbranched antiscaling polymer comprises the steps:

[0051] 1) Synthesis of hyperbranched polyether: Under ice-water bath conditions, 100 parts by volume of tetrahydrofuran and 30 parts by volume of glycidol are dissolved in the organic solvent toluene, and after stirring and mixing evenly, adding trifluoromethanesulfonate with a volume part of 0.1 acid, carry out cationic ring-opening copolymerization under normal pressure for 5 hours, add an aqueous solution of sodium hydroxide 10 times the volume of the cationic initiator to terminate the reaction, and obtain a hyperbranched polyether.

[0052] 2) Synthesis of hyperbranched antiscalant polymer: add 1 molar mass part of hyperbranched polyether, 100 molar mass parts of phosphoric anhydride and 0.001 molar mass part of catalyst 4-dimethylaminopyridine (DMAP), react at 60°C for 12h, During the reaction process, nitrogen gas was heated to the same temperature as the reaction system, and passe...

Embodiment 2

[0055] The preparation method of hyperbranched antiscaling polymer comprises the steps:

[0056] 1) Synthesis of hyperbranched polyether: at room temperature, 80 volume parts of tetrahydrofuran and 50 volume parts of glycidol were dissolved in acetone, and after stirring and mixing evenly, 0.5 volume parts of cationic initiator BF was added 3 , carry out the cationic ring-opening copolymerization reaction under normal pressure for 0.5h, add the terminator potassium hydroxide aqueous solution which is 500 times the volume of the cationic initiator to terminate the reaction, and obtain the hyperbranched polyether.

[0057] 2) Synthesis of hyperbranched scale-inhibiting polymer: add hyperbranched polyether with molar mass parts of 2.5, phosphoric acid with molar mass parts of 500, and 4-dimethylaminopyridine (DMAP) with molar mass parts of catalyst of 0.005, molar mass parts of 0.005 of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC), reacted at 80°C for 6h, dur...

Embodiment 3

[0060] The preparation method of hyperbranched antiscaling polymer comprises the steps:

[0061] 1) Synthesis of hyperbranched polyether: at 0°C to 5°C, dissolve 100 volume parts of tetrahydrofuran and 50 volume parts of glycidol in dichloromethane, stir and mix evenly, and then add 0.25 volume parts of cationic initiator Carry out cationic ring-opening copolymerization of boron trifluoride ether under normal pressure for 5 hours, add a terminator water 500 times the volume of the cationic initiator to terminate the reaction, and obtain a hyperbranched polyether.

[0062] 2) Synthesis of hyperbranched scale-inhibiting polymer: add hyperbranched polyether with a molar mass of 1, 2-phospho-1,2,4-tricarboxylic butane (PBTCA) with a molar mass of 250, and molar mass parts 0.005 catalyst 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC), react at 70°C for 10h, during the reaction, heat the nitrogen to the same temperature as the reaction system , into the reaction ...

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Abstract

The invention provides a hyperbranched scale-inhibiting polymer as well as a preparation method and application thereof, and belongs to the technical fields of scale inhibition and scale prevention inindustrial water treatment. A phosphorus-containing functional group is introduced into a peripheral end group of a hyperbranched polyether skeleton through molecular design, and the hyperbranched scale-inhibiting polymer has excellent chemical stability in water when being compared with a polyester hyperbranched polymer; due to introduction of an end phosphorus-containing functional group, the local phosphorus concentration is increased, the peripheral steric hindrance of the phosphorus functional group is improved and the scale-inhibiting property and the coroosion-inhibiting property of the hyperbranched scale-inhibiting polymer are effectively improved. When PBTCA (2-phosphoryl-1,2,4-butane tricarboxylate) serving as the phosphorus-containing functional group is introduced into the hyperbranched end group, the own performance of the PBTCA can be maintained, the scale-inhibiting and corrosion-inhibiting properties of the PBTCA can be further improved, and the hyperbranched scale-inhibiting polymer can be applied to circulating cooling water with high temperature, wide pH range, complex scale materials, a high water fixing system and the like.

Description

technical field [0001] The invention belongs to the technical field of scale inhibition and scale prevention in industrial water treatment, and relates to a hyperbranched scale inhibition polymer and its preparation method and application, in particular to a phosphorus-containing hyperbranched polyether and its preparation method and application. Background technique [0002] my country's water resources are scarce and seriously polluted, and serious water shortages will cause environmental and social problems. It is very important to save and treat sewage. With people's increasing emphasis on environmental protection and the shortage of water resources, industrial circulating cooling water has accounted for 60% to 70% of industrial water. The increase will aggravate the problems of equipment and pipelines such as corrosion, scaling and microbial slime, which will directly lead to a decrease in production rate and high energy consumption, and affect the service life of equip...

Claims

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Application Information

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IPC IPC(8): C08G65/327C08G65/335C02F5/14
CPCC02F5/14C08G65/327C08G65/3355C08G2650/04
Inventor 陈华林丁克毅刘军
Owner SOUTHWEST UNIVERSITY FOR NATIONALITIES
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