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Carboxyl-terminated hyperbranched polymer scale inhibiting and preventing agent and synthesizing method

A technology of hyperbranched polymer and synthesis method, which is applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. , single scale inhibition mechanism and other problems, to achieve the effect of good scale prevention effect, small environmental impact, and the effect of solving the scaling problem

Inactive Publication Date: 2016-11-23
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Common compounds currently used as scale inhibitors are polyphosphates containing phosphorus atoms, organic phosphate scale inhibitors, and linear polymers represented by polyacrylic acid, polyacrylic acid-maleic anhydride copolymer, and polyaspartic acid. Scale inhibitors, their problems are: firstly, phosphorus-containing scale inhibitors will pollute the environment due to the presence of phosphorus, resulting in eutrophication of water bodies, leading to serious ecological problems such as red tides; secondly, the amount of linear polymer scale inhibitors is relatively large. Larger, the scale inhibition mechanism is relatively simple and inefficient, and its use is greatly restricted by other conditions

Method used

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  • Carboxyl-terminated hyperbranched polymer scale inhibiting and preventing agent and synthesizing method
  • Carboxyl-terminated hyperbranched polymer scale inhibiting and preventing agent and synthesizing method

Examples

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Embodiment 1

[0031] Embodiment 1: in the four-neck flask that thermometer, sampling port are housed, glycerol and maleic anhydride are mixed by the molar ratio of 1: 1, then add and account for glycerol and maleic anhydride gross mass percentage is 0.5% The p-toluenesulfonic acid was reacted at 120°C for 4h, and vacuumized to obtain a hyperbranched polyester with terminal hydroxyl groups; After the modification reaction for 2 hours, deionized water with 50% polymer mass was added to obtain a carboxyl-terminated hyperbranched polymer scale inhibitor and scale inhibitor solution.

Embodiment 2

[0032] Example 2: In a four-necked flask equipped with a thermometer and a sampling port, trimethylolpropane and phthalic anhydride are mixed in a molar ratio of 1:1, and then trimethylolpropane and phthalic anhydride are added. The total mass percentage of formic anhydride is 1% p-toluenesulfonic acid, react at 120 ℃ for 5h, and vacuumize to obtain the hyperbranched polyester with terminal hydroxyl; To anhydride, carry out modification reaction at 90° C. for 3 hours, add deionized water with 40% polymer mass, to obtain carboxyl-terminated hyperbranched polymer scale inhibitor and scale inhibitor solution.

Embodiment 3

[0033]Example 3: In a four-neck flask equipped with a thermometer and a sampling port, mix diethanolamine and maleic anhydride in a molar ratio of 1:1, react at 60°C for 0.5h, and then add diolamine and maleic anhydride The total mass percent is 0.2% p-toluenesulfonic acid, react at 120°C for 6h, and vacuumize to obtain the hyperbranched poly(amide-ester) with terminal hydroxyl; then add the hyperbranched poly(amide-ester) with terminal hydroxyl mole Succinic anhydride with a ratio of 1:1.2 was modified at 100° C. for 4 hours, and deionized water with 50% polymer mass was added to obtain a carboxyl-terminated hyperbranched polymer scale inhibitor and scale inhibitor solution.

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Abstract

The invention relates to a carboxyl-terminated hyperbranched polymer scale inhibiting and preventing agent and a preparing method thereof. By means of novel molecular design, the carboxyl-terminated hyperbranched polymer scale inhibiting and preventing agent is synthesized with a double-monomer method and a single-monomer method, the molecular structure of the carboxyl-terminated hyperbranched polymer scale inhibiting and preventing agent is a hyperbranched structure, carboxyl serves as a terminal, and an ester group or an amide group or an ester group and an amide group or the like is included in molecules. The industrial water treatment agent with the scale inhibiting and preventing performance is prepared by carrying out carboxylation modification on a carboxyl-terminated hyperbranched polymer in a melt polymerization mode, or in the mode of directly synthesizing the carboxyl-terminated hyperbranched polymer. The scale inhibiting and preventing agent is good in performance, and can be applied to the industrial process in the petrochemical industry, the textile industry, the food industry and the like.

Description

technical field [0001] The invention relates to the technical field of scale inhibition and scale prevention in industrial water treatment, in particular to a scale inhibition and scale prevention agent used as a carboxyl-terminated hyperbranched polymer and a preparation method thereof. Background technique [0002] In the petrochemical industry, textile industry, semiconductor industry, food industry, pharmaceutical industry and other industrial processes, a large amount of industrial water is used. Due to the high hardness of the water, it often brings serious scaling of equipment, accompanied by corrosion damage. occur, resulting in serious economic losses. Scaling often exists on the piping system, container surface, boiler and heat exchanger surface, resulting in reduced thermal efficiency, waste of fuel, affecting the safe operation of the boiler, reducing the service life of the boiler, and can lead to corrosion of metals under the scale. It is estimated that the ec...

Claims

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Application Information

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IPC IPC(8): C08G63/91C08G63/685C08G63/20C08G63/44C08G63/78C02F5/12
Inventor 陈华林单宁刘白玲罗荣李晨英
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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