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Method for precipitating polymer

A polymer and copolymer technology, applied in the direction of amide/imide polymer adhesives, adhesive types, recycling technology, etc., can solve problems such as safety hazards, high energy consumption, and large energy costs, and achieve the elimination of Contamination, the effect of shortening the time spent

Pending Publication Date: 2022-08-02
GUANGDONG HAOZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach in turn incurs substantial energy costs during the separation process (due to high energy consumption)
Additionally, autoclaving can pose a safety hazard

Method used

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  • Method for precipitating polymer
  • Method for precipitating polymer
  • Method for precipitating polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0335] Preparation of the first suspension

[0336] A) Preparation of polymers

[0337] 16 g of sodium hydroxide (NaOH) was added to a round bottom flask containing 380 g of distilled water. The combination of ingredients was stirred at 80 rpm for 30 minutes to obtain the first mixture.

[0338] 36.04 g of acrylic acid (AA) was added to the first mixture. The combination of raw materials was further stirred at 80 rpm for 30 minutes to obtain a second mixture.

[0339] 19.04 g of acrylamide (AM) was dissolved in 10 g of deionized water to form an AM solution. Then, 29.04 g of AM solution was added to the second mixture. The combination of raw materials was further heated to 55°C and stirred at 80 rpm for 45 minutes to obtain a third mixture.

[0340] 12.92 g of acrylonitrile (AN) was added to the third mixture. The combination of raw materials was further stirred at 80 rpm for 10 minutes to obtain a fourth mixture.

[0341] Further, 0.015g of water-soluble free radical i...

Embodiment 2

[0350] Preparation of the first suspension of Example 2

[0351] The preparation of the first suspension was carried out in the same manner as in Example 1, except that 5.56 g of polymer was added to 45.04 g of distilled water and the mixture was stirred at 80 rpm for 10 minutes to obtain 50.60 g of the first suspension .

[0352] Recovery of the polymer of Example 2

[0353] Recovery of the polymer was carried out in the same manner as in Example 1, except that a 1 M sulfuric acid solution was added to the first suspension to form a second suspension having a pH of 2.96.

Embodiment 3

[0354] Preparation of the first suspension of Example 3

[0355] The preparation of the first suspension was carried out in the same manner as in Example 1, except that 5.56 g of polymer was added to 44.52 g of distilled water and the mixture was stirred at 80 rpm for 10 minutes to obtain 50.08 g of the first suspension .

[0356] Recovery of the polymer of Example 3

[0357] Recovery of the polymer was carried out in the same manner as in Example 1, except that a 1 M sulfuric acid solution was added to the first suspension to form a second suspension having a pH of 2.07.

[0358] The recovery of the polymer of Example 3 was repeated by stirring the second suspension at 200 rpm for 60 minutes and 120 minutes, respectively, at 25°C. The second suspension stirred for 60 minutes gave a polymer recovery of 99.42%, while the second suspension stirred for 120 minutes gave a polymer recovery of 99.43%. There was no indication that polymer recovery increased significantly with ...

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Abstract

Provided herein is a method of precipitating a polymer by adding a precipitating agent to a first suspension to form a second suspension wherein the first suspension comprises a polymer and an aqueous solvent, and wherein the polymer comprises a copolymer, the copolymer comprises a structural unit derived from an acid group-containing monomer and a structural unit derived from a hydrophobic group-containing monomer. The methods for precipitating a polymer disclosed herein are developed to initiate destruction and / or breakage of a bond between the polymer and an aqueous solvent in a second suspension. This accompanies a structural transformation of the polymer caused by intermolecular and intramolecular interactions of the polymer chain, causing the polymer to precipitate. The method of the present invention avoids complex separation processes and contamination of polymers, achieves excellent material recovery, and allows precipitation of polymers to be achieved in a short period of time. Disclosed herein is the use of a method of precipitating a polymeric binder in a battery electrode.

Description

Technical field [0001] The present invention relates to the field of methods of material recovery. In particular, the present invention relates to methods of precipitating polymers. Background technique [0002] The acceleration of urbanization, rapid development of technological innovation and the consequent frequent replacement of products or disposal of discarded consumables have led to shortened product life and / or overproduction of waste. With the emergence of growing problems associated with overproduction of waste, such as adverse effects on human health, adverse effects on the environment, and depletion of resources, there has been an urgent need for rapid action worldwide, utilizing various Waste management approaches address these complex issues. [0003] Recycling serves as a key component in the tiered hierarchy of waste reduction, which aims to recover valuable materials from waste for reuse. Recycling of materials conserves natural resources, reduces energy ...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/13H01M10/052H01M10/0525C09J133/26C08F220/56C08F220/46
CPCH01M10/54H01M4/0404H01M4/667Y02W30/84Y02W30/62C22B7/005C22B7/006C08F220/06C09D133/064C09D133/22H01M4/622Y02E60/10C08F220/56C08F220/44C08F6/12C08J11/06C08K3/30C08K2003/309C09J2301/314C09J2301/502C09J2301/414B29B17/02B32B43/006C08J11/26C08J2333/02C09J5/02C09J133/02C09J2203/33C09J2433/00
Inventor 何锦镖江英凯董杨坚
Owner GUANGDONG HAOZHI TECH CO LTD
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