Polyacrylate synthesizing method

A technology of polyacrylate and synthesis method, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of large amount of initiator, recycling, and precipitation, so as to improve the stability of product quality, reduce the content of inorganic sulfur, The effect of simple synthesis process

Active Publication Date: 2019-03-19
SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis process has the advantages of high conversion rate, high product purity, and molecular weight distribution, but first, the molecular weight regulator sodium formate is used in a large amount and cannot be recycled by external steaming like isopropanol, which increases the manufacturing cost of the product; secondly, The activity of sodium bisulfite is relatively high, the utilization rate of active groups generated after decomposition is low, the amount of initiator used is too large, and a large amount of sulfate ions will be generated after oxidation and reduction, which will cause precipitation problems in the product in winter or under low temperature collisions. Product quality is not stable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Dissolve 130g of sodium metabisulfite in 303g of deionized water to prepare an aqueous solution with a concentration of 30% by mass and put it into the dropping device;

[0025] (2) Dissolve 4.5g of oxidant in 25.5g of deionized water to prepare an aqueous solution with a concentration of 15% by mass and put it into another dropping device;

[0026] (3) Mix 1000g of acrylic acid with 100g of deionized water evenly, and pour it into the acrylic acid dropping device;

[0027] (4) Put the remaining 551.5g of deionized water into the kettle, turn on the stirring and raise the temperature to 60~65°C, and at the same time turn on the dropping device in step (1), step (2) and step (3) and control the dropping speed of the material The acrylic acid monomer and the reducing agent sodium metabisulfite solution are added dropwise at the same time, and the oxidizing agent is delayed for 6 minutes before the dropwise addition is completed, and all the dropwise addition is comple...

Embodiment 2

[0030] (1) Dissolve 106g of sodium metabisulfite in 318g of deionized water to prepare an aqueous solution with a concentration of 25% by mass and put it into the dropping device;

[0031] (2) Dissolve 11.5g of oxidant in 52.4g of deionized water to prepare an aqueous solution with a concentration of 18% by mass and put it into another dropping device;

[0032] (3) Mix 1000g of acrylic acid and 150g of deionized water evenly, and put it into the acrylic acid dropping device;

[0033] (4) Put the remaining 429.6g of deionized water into the kettle, turn on the stirring and raise the temperature to 60~65°C, at the same time turn on the dropping device in step (1), step (2) and step (3) and control the dropping speed of the material The acrylic acid monomer and the reducing agent sodium metabisulfite solution are added dropwise at the same time, the oxidizing agent is delayed for 10 minutes, and the dropwise addition is completed in 1 hour and 45 minutes;

[0034] (5) After heat...

Embodiment 3

[0036] (1) Dissolve 109g of sodium metabisulfite in 389g of deionized water to prepare an aqueous solution with a concentration of 28% by mass and put it into the dropping device;

[0037] (2) Dissolve 8g of oxidant in 45.3g of deionized water, prepare an aqueous solution with a concentration of 15% by mass and put it into another dropping device;

[0038] (3) Mix 1000g of acrylic acid and 120g of deionized water evenly, and put it into the acrylic acid dropping device;

[0039] (4) Put the remaining 445.7g of deionized water into the kettle, turn on the stirring and raise the temperature to 60~65°C, and at the same time turn on the dropping device in step (1), step (2) and step (3) and control the dropping speed of the material The acrylic acid monomer and the reducing agent sodium metabisulfite solution are added dropwise at the same time, and the oxidizing agent is delayed for 8 minutes before the dropwise addition is completed, and all the dropwise addition is completed wi...

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PUM

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Abstract

The invention discloses a synthesizing method of a water treatment agent of polyacrylate. Specifically, the method comprises, at 60-65 DEG C, with the aqueous phase as a reaction medium and a sulfateand sodium metabisulfite redox system as the initiator and under mixing conditions, dropwise adding monomers of a certain concentration and an initiator aqueous solution simultaneously into a reactorfor polymerization, and then performing heat preservation, distillation, hydrogen peroxide decoloration and sodium hydroxide neutralization to obtain the polyacrylate. The synthesizing method of the polyacrylate is low in consumption of the initiator and high in initiation efficiency and product purity; the synthesized polyacrylate is phosphorous-free, low in sulfur content and stable in quality.The synthesizing method of the polyacrylate is simple in synthesis, easy to control during processes, simple in operation and applicable to scale and industrial application; the synthesized polyacrylate can be applied as water quality stabilizer, ceramic additive, pigment dispersant, well drilling fluid loss agent, cement water reducer and the like in industrial heat exchange devices.

Description

technical field [0001] The invention belongs to the field of polymerization reaction, and in particular relates to a method for synthesizing polyacrylic acid salt of a water treatment agent. technical background [0002] Polyacrylate is one of the acrylic fine chemical products developed at home and abroad in recent years. The product is widely used in industrial heat exchange equipment as water quality stabilizer, ceramic additive, pigment dispersant, drilling mud fluid loss reducer, cement water reducer medicines and other fields. [0003] Due to the specific relative molecular weight, application function and economical considerations of its synthesis method, solution method, suspension method and emulsion method can be used to synthesize solution state, colloid, rubber plate or powder polymer. In actual production, in order to achieve easy control of molecular weight and stable product quality, sodium hypophosphite is often used as the reducing agent of the redox initia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/06C08F4/40C02F1/56
CPCC02F1/56C08F4/40C08F120/06
Inventor 林胜涛程终发申义驰李鹏飞陆久田王宁宁张敏
Owner SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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