High-temperature-resistant scale inhibition dispersing agent and preparation method thereof

A scale-inhibiting dispersant, high-temperature-resistant technology, applied in chemical instruments and methods, scale removal and water softening, water/sludge/sewage treatment, etc., can solve time-consuming and labor-intensive equipment, system failure to operate normally, and poor scale-inhibiting ability and other issues, to achieve the effect of promoting the development process, excellent scale inhibition and dispersibility, and excellent performance

Active Publication Date: 2021-03-16
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the evaporator and heat exchanger are scaled, the thermal conductivity will be seriously affected, causing the system to fail to operate normally. Once scaled, chemical cleaning must be carried out
Chemical cleaning is time-consuming and labor-intensive, and will cause equipment corrosion and environmental pollution, especially multi-stage flash evaporation/multi-effect evaporation, seawater desalination, etc. are prone to form sulfate scale. Because of its dense structure and generally insoluble in acid, the above-mentioned The antiscalant required for the system must have

Method used

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  • High-temperature-resistant scale inhibition dispersing agent and preparation method thereof
  • High-temperature-resistant scale inhibition dispersing agent and preparation method thereof
  • High-temperature-resistant scale inhibition dispersing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of Organophosphine Hyperbranched Macromolecules

[0039] In the reaction kettle, add 1000ml deionized water, heat up to 80-90°C, add 1mol melamine to slowly dissolve, then add 3.5mol succinic anhydride at 110-120°C for 1.5h reaction, then add 3mol melamine, and react at 130°C for 1.5h , lower the temperature to below 60°C, add 20mol 37wt% formalin and 25mol hydrochloric acid, mix well, add dropwise a solution containing 20mol phosphorous acid in the mixture, the dropping temperature is lower than 60°C, after the dropwise addition, 105°C Reflux for 2 hours to obtain organic phosphine hyperbranched macromolecules.

Embodiment 2

[0041] Preparation of multiple copolymers

[0042] S1: Add 10 parts by weight of sodium 2-acrylamide-2-methylpropanesulfonate and 15 parts by weight of deionized water into the reactor, and stir to dissolve;

[0043] S2: Dissolve 5 parts by weight of sodium 2-acrylamide-2-methylpropanesulfonate in 10 parts by weight of deionized water, and add it to the head tank 1;

[0044] S3: Add 20 parts by weight of hydrogen peroxide (27.5% content) into the head tank 2;

[0045] S4: Add 5 parts by weight of L-aspartic acid, 20 parts by weight of succinic anhydride, and 0.005 parts by weight of vanadium pentoxide to the reaction kettle, stir and mix evenly, heat up to 110-115°C and reflux for 1.5h, then cool down to 105°C -110°C;

[0046] S5: slowly drop the sulfonate solution in the head tank 1 and the initiator in the head tank 2 into the reactor, and continue to react for 1.5 hours after the drop addition is completed to obtain the multi-component copolymer A1.

Embodiment 3

[0048] Preparation of multiple copolymers

[0049] S1: Add 10 parts by weight of sodium 2-acrylamide-2-methylpropanesulfonate, 5 parts by weight of sodium styrene sulfonate and 35 parts by weight of deionized water into the reactor, and stir to dissolve;

[0050] S2: Dissolve 5 parts by weight of sodium styrene sulfonate in 15 parts by weight of deionized water, and add it to the head tank 1;

[0051] S3: Add 15 parts by weight of hydrogen peroxide (27.5% content) into the head tank 2;

[0052]S4: Add 10 parts by weight of glutamic acid, 25 parts by weight of succinic anhydride, and 0.01 parts by weight of vanadium pentoxide to the reaction kettle in sequence, stir and mix evenly, heat up to 110-115°C and reflux for 1.5h, then cool down to 105- 110°C;

[0053] S5: slowly drop the sulfonate solution in the head tank 1 and the initiator in the head tank 2 into the reactor, and continue to react for 2 hours after the drop addition is completed to obtain the multi-component copo...

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Abstract

The invention discloses a high-temperature-resistant scale inhibition dispersing agent and a preparation method thereof. The high-temperature-resistant scale inhibition dispersing agent is prepared from the following raw materials in parts by weight: 15-25 parts of hyperbranched macromolecules, 23-47 parts of a multipolymer, 10-15 parts of modified chitosan and 20-45 parts of deionized water. Thehyperbranched macromolecules are organic phosphine hyperbranched macromolecules taking melamine as a core. The multipolymer is prepared by copolymerization of amino acid, carboxylic anhydride and sulfonate. The high-temperature-resistant scale inhibition dispersing agent capable of being used for multistage flash evaporation and sea water desalination systems is prepared from hyperbranched macromolecules, multipolymer and modified chitosan. Compared with the existing similar products, the high-temperature-resistant scale inhibition dispersing agent prepared by the invention has excellent performance and is particularly more outstanding in the aspects of sulfate and silicon scale inhibition, and efficient, energy-saving and stable operation of a multi-effect evaporation and sea water desalination system is realized.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a high-temperature-resistant scale-inhibiting dispersant and a preparation method thereof. Background technique [0002] Water is one of the important energy sources for economic development. With the continuous advancement of industrialization, the contradiction between the rapid development of industry and the relative shortage of water resources has become increasingly prominent. The recycling of a large amount of wastewater in industrial production has become an effective means of water conservation and environmental protection. In order to improve the utilization rate of water resources and meet environmental protection requirements, many enterprises use multi-stage flash evaporation / multi-effect evaporation and other devices to treat high-hardness wastewater, effectively achieving zero discharge. [0003] Evaporator fouling means that the concentrated sa...

Claims

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Application Information

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IPC IPC(8): C02F5/14C02F5/10C08G83/00C08F283/04C08F220/58C08F212/14C02F103/08
CPCC02F5/145C02F5/105C08G83/006C08G83/005C08F283/04C02F2103/08C08F220/585C08F212/30
Inventor 张留成刘文峰郭翠娟胡文翠梁清雷耿俊玲郑萍范春燕梁新新
Owner SHANDONG TIANQING TECH DEV
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