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

Method of preparing high water absorption resin

The technology of super absorbent resin and leaves is applied in the field of preparation of super absorbent resin, which can solve the problems of complex synthesis process, short service life, poor aging resistance and the like, and achieves the effects of simple process, reduced cost and improved grafting efficiency.

Inactive Publication Date: 2007-10-24
SHAANXI UNIV OF SCI & TECH
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently used acrylonitrile, acrylic acid, acrylamide, and sulfonic acid-containing monomers are used as monomers to graft on starch to prepare water-absorbent resins with poor aging resistance and short service life; the synthesis process of starch derivatives and cellulose derivatives for water-absorbent resins complex and expensive

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Embodiment 1: Activation of leaves: first the leaves are cleaned, put into an oven for drying, and then pulverized through a 120 mesh sieve, soaked in NaOH solution with a mass concentration of 17.5% at room temperature for 15 hours, washed with water until neutral and dried ; The dried leaves in the pass have N 2 Under certain conditions, add 1% of the mass concentration of the leaves to be 10% NaOH solution at 95°C with a stirring speed of 160r / min to activate the dried leaves for 1.5 hours, then cool down to 45°C, then add the leaves 0.9% initiator NaHSO 3 with (NH 4 ) 2 S 2 o 8 Initiate 0.5h, NaHSO 3 with (NH 4 ) 2 S 2 o 8 The mass ratio of NaHSO 3 :(NH 4 ) 2 S 2 o 8 =1:2; Preparation of monomer solution: neutralize acrylic acid with a NaOH solution with a mass concentration of 33%, so that the neutralization degree of acrylic acid in the system is 77% to obtain an acrylic acid solution, and then prepare an acrylamide solution with a mass fraction of 6...

Embodiment 2

[0007] Embodiment 2: Activation of leaves: first the leaves are cleaned, put into an oven for drying, and then pulverized through a 120 mesh sieve, soaked in NaOH solution with a mass concentration of 17.5% at room temperature for 15 hours, washed with water until neutral and dried ; The dried leaves in the pass have N 2 Under certain conditions, add 1% of the mass concentration of the leaves to be 10% NaOH solution at 95°C with a stirring speed of 180r / min to activate the dried leaves for 1.5 hours, then cool down to 45°C, then add the leaves 0.7% initiator NaHSO 3 with (NH 4 ) 2 S 2 o 8 Initiate 0.5h, NaHSO 3 with (NH 4 ) 2 S 2 o 8 The mass ratio of NaHSO 3 :(NH 4 ) 2 S 2 o 8 =1:2; Preparation of monomer solution: neutralize acrylic acid with a NaOH solution with a mass concentration of 40%, so that the neutralization degree of acrylic acid in the system is 77% to obtain an acrylic acid solution, and then prepare an acrylamide solution with a mass fraction of 6...

Embodiment 3

[0008] Embodiment 3: Activation of leaves: first leaves are washed, put into an oven for drying and then pulverized through a 120 mesh sieve, soaked in NaOH solution with a mass concentration of 17.5% at room temperature for 15h, washed with water until neutral and dried ; The dried leaves in the pass have N 2 Under certain conditions, add 1% of the mass concentration of the leaves and add a NaOH solution with a mass concentration of 10% at 95°C with a stirring speed of 150r / min to activate the dried leaves for 1.5 hours, then cool down to 45°C, and then add the leaves 1% initiator NaHSO 3 with (NH 4 ) 2 S 2 o 8 Initiate 0.5h, NaHSO 3 with (NH 4 ) 2 S 2 o 8 The mass ratio of NaHSO 3 :(NH 4 ) 2 S 2 o 8 =1:2; preparation of monomer solution: neutralize acrylic acid with a NaOH solution with a mass concentration of 37%, so that the neutralization degree of acrylic acid in the system is 77% to obtain an acrylic acid solution, and then prepare an acrylamide solution w...

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

No PUM Login to View More

Abstract

The invention discloses a method for preparation of a water-absorbing quality resin, which comprises the following steps: washing to the neutral and drying after washing, drying and disintegrating the tree leaves and after immersing with the NaOH solution; dealing actively the dried tree leaves with the NaOH solution in the condition of N2; adding initiating agent; getting the mixing solution by mixing the neutralizing acroleic acid with the NaOH solution with the acrylamide solution; adding K2S2O8, the cross linker and the perforater after mixing the active dealing leaves with the mixed solution; drying the output in the vacuum drying oven; disintegrating. The invention applies to a graft copolymerization reaction, which has a simple technique; improves the efficient; reduces the cost.

Description

technical field [0001] The invention relates to a preparation method of a superabsorbent resin used in agriculture and forestry. Background technique [0002] With its unique water absorption and water retention capacity, superabsorbent resins are widely used in agriculture, forestry and horticulture, desert control, medical and health, physiological hygiene, coatings, industrial fields, civil engineering, artificial intelligence, aerospace and other fields. It can improve the physical and chemical properties of soil, promote the growth of crops, and prevent soil erosion. Currently used acrylonitrile, acrylic acid, acrylamide, and sulfonic acid-containing monomers are used as monomers to graft on starch to prepare water-absorbent resins with poor aging resistance and short service life; the synthesis process of starch derivatives and cellulose derivatives for water-absorbent resins Complicated and expensive. The present invention adopts leaves as natural raw materials, and...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00C08F220/56C08F220/06
Inventor 王磊李仲谨宋凉赵新法朱雷刘保健来水利蔡京荣韩敏黄凤萍全晓程磊王博涛
Owner SHAANXI UNIV OF SCI & TECH
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