Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Synthetic method of amphoteric polyacrylamide, reinforcing agent for waste paper recovery and papermaking and preparation method of reinforcing agent

A technology of polyacrylamide and synthesis method, which is applied in the field of papermaking additives, can solve the problems of paper strength reduction, paper strength reduction, fiber shortening, etc., and achieve the effect of enhancing paper strength and improving strength

Pending Publication Date: 2022-01-18
深圳市瑞洲实业股份有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the current domestic market, due to the extensive use of waste paper, China will use 53.63 million tons of waste paper pulp in 2020, which is a huge amount; and due to the prohibition of foreign waste imports, many domestic paper mills use wood fiber, sludge, etc. to fill waste In the process of paper recycling, the length and strength of fibers are obviously reduced after the waste paper pulp is beaten. In addition, ordinary wood fiber, sludge, calcium carbonate filling, etc. will reduce the strength of the paper, so we need a special waste paper pulp. Strengthening agent to improve paper strength
[0003] Polyacrylamide (PAM) is an important class of water-soluble polymers, which can introduce various ionic groups to obtain specific properties. It is widely used in chemical industry, metallurgy, geology, coal, petroleum, papermaking and water treatment, etc. In various fields, it has the title of "Baiye Auxiliary"; but traditional polyacrylamide is used as a strengthening agent in papermaking, because in the papermaking process, a large amount of calcium carbonate slurry is used for filling, or sludge reuse, Or the use of some wood fibers, etc., resulting in a decrease in paper strength; and the current use of recycled waste paper pulping in large quantities, resulting in shorter fibers and lower fiber strength. The currently used polyacrylamide, cationic, and anionic The improvement of paper strength is becoming less and less obvious. In the current state, more and more waste paper will be recycled and pulped, which puts forward higher requirements for the performance of the strengthening agent. The polyacrylamide strengthening agent currently used in papermaking There is a lot of room for improvement and optimization; therefore, the present invention expects to develop a synthetic method of amphoteric polyacrylamide, and use the amphoteric polyacrylamide to prepare reinforcing agents to solve the problems encountered by traditional reinforcing agents

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Synthetic method of amphoteric polyacrylamide, reinforcing agent for waste paper recovery and papermaking and preparation method of reinforcing agent
  • Synthetic method of amphoteric polyacrylamide, reinforcing agent for waste paper recovery and papermaking and preparation method of reinforcing agent
  • Synthetic method of amphoteric polyacrylamide, reinforcing agent for waste paper recovery and papermaking and preparation method of reinforcing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1 A kind of preparation method of papermaking strengthening agent, comprises the following steps:

[0051] 1, the preparation of amphoteric polyacrylamide (structure such as Figure 7 The compound ②)

[0052] S1. Preparation of substrate

[0053]Add 400g of deionized water to the reactor, then add 42g of acrylamide, 0.3g of sodium bisulfite, stir to dissolve, add 18g of acrylic acid, 30.7g of methacryloyloxyethyltrimethylammonium chloride, stir well, add EDTA 0.03g, stir evenly, heat up to 60°C, obtain the substrate, and set aside;

[0054] S2, the preparation of solution A

[0055] Add 30g of acrylamide to the monomer tank, stir to dissolve, add 18g of acrylic acid, 30.7g of methacryloxyethyltrimethylammonium chloride, 200g of water, stir to dissolve, add 10% sodium hydroxide solution to adjust the pH Value is 3.5, obtain solution A, stand-by;

[0056] S3, preparation of solution B

[0057] Add 12g of acrylamide and 192g of water into the monomer kettl...

Embodiment 2

[0067] A preparation method of a papermaking reinforcing agent, comprising the following steps:

[0068] 1, the preparation of amphoteric polyacrylamide (structure such as Figure 7 The compound ②)

[0069] S1. Preparation of substrate

[0070] Add 400g of deionized water to the reactor, then add 30g of acrylamide, 0.3g of sodium bisulfite, stir to dissolve, add 18g of acrylic acid, 30.7g of methacryloyloxyethyltrimethylammonium chloride, stir well, add EDTA 0.03g, stir evenly, heat up to 50°C, obtain the substrate, and set aside;

[0071] S2, the preparation of solution A

[0072] Add 42g of acrylamide to the monomer tank, stir to dissolve, add 18g of acrylic acid, 30.7g of methacryloyloxyethyltrimethylammonium chloride, 200g of water, stir to dissolve, add 30% sodium hydroxide solution to adjust the pH value For 3, obtain solution A, stand-by;

[0073] S3, preparation of solution B

[0074] Add 12g of acrylamide and 192g of water into the monomer kettle, stir to dissol...

Embodiment 3

[0084] A preparation method of a papermaking reinforcing agent, comprising the following steps:

[0085] 1, the preparation of amphoteric polyacrylamide (structure such as Figure 7 The compound ②)

[0086] S1. Preparation of substrate

[0087] Add 400g of deionized water to the reaction kettle, then add 42g of acrylamide, 0.3g of sodium bisulfite, stir to dissolve, add 9g of acrylic acid, 30.7g of methacryloyloxyethyltrimethylammonium chloride, stir well, add EDTA 0.03g, stir evenly, heat up to 50-70°C, get the substrate, set aside;

[0088] S2, the preparation of solution A

[0089] Add 30g of acrylamide to the monomer tank, stir to dissolve, add 18g of acrylic acid, 30.7g of methacryloyloxyethyltrimethylammonium chloride, 200g of water, stir to dissolve, add an appropriate amount of liquid alkali to adjust the pH to 3- 4. Obtain solution A for use;

[0090] S3, preparation of solution B

[0091] Add 12g of acrylamide and 192g of water into the monomer kettle, stir to ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Viscosityaaaaaaaaaa
Viscosityaaaaaaaaaa
Viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a synthetic method of amphoteric polyacrylamide, a reinforcing agent for waste paper recovery and papermaking and a preparation method of the reinforcing agent. The amphoteric polyacrylamide is obtained through an initiation reaction on the basis of acrylamide. The reinforcing agent for waste paper recovery and papermaking comprises the amphoteric polyacrylamide and a glyoxal urea polymer in a weight ratio of 1: (1-3). The reinforcing agent provided by the invention can obviously improve the strength of paper.

Description

technical field [0001] The invention relates to the technical field of papermaking auxiliary agents, in particular to a synthesis method of amphoteric polyacrylamide, a reinforcing agent for waste paper recycling and papermaking and a preparation method thereof. Background technique [0002] In the current domestic market, due to the extensive use of waste paper, China will use 53.63 million tons of waste paper pulp in 2020, which is a huge amount; and due to the prohibition of foreign waste imports, many domestic paper mills use wood fiber, sludge, etc. to fill waste In the process of paper recycling, the length and strength of fibers are obviously reduced after the waste paper pulp is beaten. In addition, ordinary wood fiber, sludge, calcium carbonate filling, etc. will reduce the strength of the paper, so we need a special waste paper pulp. Strengthening agent to improve paper strength. [0003] Polyacrylamide (PAM) is an important class of water-soluble polymers, which ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08F285/00C08F220/56C08F220/20C08F220/32C08F265/10C08F220/34C08F220/06C08G12/12D21H17/45D21H17/43D21H17/49D21H21/18D21H21/20
CPCC08F285/00C08F265/10C08F220/56C08G12/12D21H17/455D21H17/43D21H17/49D21H21/18D21H21/20C08F220/06C08F220/34C08F220/20C08F220/325
Inventor 鲁代玉沈杰陈荦
Owner 深圳市瑞洲实业股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com