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A kind of method utilizing hydrogen peroxide/resin to catalyze the aqueous phase polymerization of ethylenic monomer

A technology of hydrogen peroxide and polymer, which is applied in the field of hydrogen peroxide/resin system to catalyze the aqueous phase polymerization of vinyl monomers, which can solve the problems that are not conducive to large-scale industrial production and environmental protection, green environmental protection, water eutrophication, etc. problems, to achieve the effect of low cost, easy separation and reuse, and long utilization time

Active Publication Date: 2021-04-30
SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the redox system composed of oxidizing agent-organic reducing agent has lower initiation efficiency than the redox system composed of oxidizing agent-inorganic oxidizing agent under the same experimental conditions; oxidizing agent (persulfate, hydroperoxide)-inorganic reducing agent ( The redox system composed of sulfite and other salts containing low-valence sulfur elements) triggers the synthesis of polymer aqueous solution containing sulfur dioxide with pungent odor, and there is a problem of deep color of the product, which needs further treatment; oxidizing agent (over Sulphate, hydroperoxide) -- the redox system composed of inorganic reducing agent (hypophosphite, etc.) triggers the synthetic polymer aqueous solution to contain phosphorus, which is easy to cause environmental problems such as red tide and water eutrophication, which is contrary to green environmental protection
[0004] In order to solve the above problems, the redox system composed of oxidant (hydrogen peroxide)-inorganic reducing agent (metal and its oxide) is often used to trigger the synthesized polymer aqueous solution. The composite metal oxide is used as reducing agent, and hydrogen peroxide is used as initiator to synthesize hydrolyzed polymaleic anhydride. The products synthesized by this method mostly present the characteristic color of metal ions, and the existence and enrichment of metal ions will cause certain environmental pollution.
Not conducive to large-scale industrial production and environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) At room temperature, add 200g of acrylic acid, 200g of high-purity water and 12g of strong acid metal cation resin catalyst into the reaction kettle in sequence;

[0025] (2) Pour 150g of hydrogen peroxide aqueous solution with a mass percentage of 27.5% into the constant pressure dropping device for later use;

[0026] (3) Stir the mixed system in step (1) evenly and raise the temperature to 85~88°C, start to add the initiator dropwise, and finish adding the initiator dropwise in 2 hours;

[0027] (4) Heat preservation reaction at 90±2°C for 0.5 hours. After cooling and filtering, 545g of colorless and transparent polyacrylic acid aqueous solution was obtained. The content of free monomer (calculated as AA) in the product was 0.05% after testing, and the content of hydrogen peroxide was not detected. , its viscosity-average molecular weight is about 4800, the conversion rate is 99.86% (based on the amount of acrylic acid input), and the recovered resin catalyst can...

Embodiment 2

[0029] (1) At room temperature, add 120g of acrylic acid, 80g of 2-acrylamide-2-methylpropanesulfonic acid, 250g of high-purity water and 10g of strong acid metal cation resin catalyst into the reaction kettle in sequence;

[0030] (2) Pour 140 g of 30% hydrogen peroxide aqueous solution into the constant pressure dropping device for later use;

[0031] (3) Stir the mixed system in step (1) evenly and raise the temperature to 85~88°C, start to add the initiator dropwise, and finish adding the initiator in 2.5 hours;

[0032] (4) Reaction at 90±2°C for 0.5 hours. After cooling and filtering, 586g of a colorless and transparent carboxylic acid-sulfonic acid copolymer aqueous solution was obtained. The free monomer (calculated as AA) content of the product was 0.08% after testing. The content of hydrogen peroxide has not been detected, its viscosity average molecular weight is about 5000, and its conversion rate is 99.76% (based on the amount of acrylic acid input). The recovered...

Embodiment 3

[0034] (1) At room temperature, add 150g of acrylic acid, 50g of maleic anhydride, 220g of high-purity water and 14g of strong acid metal cation resin catalyst into the reaction kettle in sequence;

[0035] (2) Pour 130 g of 40% hydrogen peroxide aqueous solution into the constant pressure dripping device and set aside;

[0036] (3) Stir the mixed system in step (1) evenly and raise the temperature to 88~92°C, start to add the initiator dropwise, and finish adding the initiator dropwise in 3 hours;

[0037] (4) Reaction at 92±2°C for 1 hour. After cooling and filtering, 543g of a colorless and transparent acrylic acid-maleic acid copolymer aqueous solution was obtained. The free monomer (calculated as AA) content of the product was 0.13% after testing. No hydrogen peroxide content was detected, its viscosity-average molecular weight was about 4400, and the conversion rate was 99.64% (based on the amount of acrylic acid input), and the recovered resin catalyst could be recycled...

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PUM

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Abstract

The invention discloses a preparation method of a polymer. In the water phase, the resin catalyzes the decomposition of hydrogen peroxide to generate primary free radicals OH·, and the primary free radicals OH· serve as initiators to initiate the polymerization of olefins and their derivatives to obtain an aqueous polymer solution. The present invention uses a strong acid cationic resin / hydrogen peroxide system to replace the traditional redox system containing sulfur, phosphorus and transition metals to initiate polymerization, the product has high purity, and avoids environmental and human safety problems caused by sulfur, phosphorus and transition metals; The amount of catalyst is small, easy to separate and reuse, and the cost of use is low; the catalytic efficiency is high, the reaction cycle is short; it is non-corrosive, and the service life of the equipment is extended. At the same time, the yield of the product synthesized by this method is greater than 90%, and the product performance is stable.

Description

technical field [0001] The invention belongs to the field of organic polymerization, and in particular relates to a hydrogen peroxide / resin system catalyzed aqueous phase polymerization of vinyl monomers. Background technique [0002] A large number of polymers used as materials in the world today are made of low-molecular organic compounds obtained from coal, petroleum, natural gas, etc., and then polymerized. These low-molecular compounds are called "monomers", and the high-molecular compounds produced by their polymerization are called polymers. Polymers are widely used, covering people's clothing, food, housing, transportation, various sectors of the national economy and cutting-edge technologies. General-purpose, engineering material, functional, bionic, medical, reagent and catalytic polymers play an important role in promoting industrial and agricultural production and cutting-edge technology, as well as in exploring the mysteries of life, conquering cancer and treat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/06C08F220/06C08F222/06C08F220/58C08F220/20C08F4/40
Inventor 赵开源陆久田王燕平陈成效宋盟盟马召腾邱玉章
Owner SHANDONG TAIHE WATER TREATMENT TECH CO LTD