A process for improving the efficiency of SAP preparation

A process method and technology of preparation efficiency, applied in the coating and other directions, can solve the problems of affecting product quality, high energy consumption, long drying time, etc., and achieve the effects of fast product absorption, low energy consumption, and improved reactivity

Active Publication Date: 2019-02-19
SHANDONG HAOYUE NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In industrial production, the production efficiency of high-absorbent resin is low, and the entire polymerization and drying time are long; moreover, most of the current processes have high temperature and long drying time in the drying process, high energy consumption, and low industrial production efficiency.
In order to improve the shortcomings of the above-mentioned processes, extrusion granulation technology is used in the production process at home and abroad. However, the process belongs to the dynamic polymerization process, which will affect the stability of the degree of polymerization of the product, the chain length of the polymer and the grid structure. , which in turn reduces the absorption performance and salt resistance of the product, and the grid strength is low, which affects the product quality

Method used

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  • A process for improving the efficiency of SAP preparation
  • A process for improving the efficiency of SAP preparation
  • A process for improving the efficiency of SAP preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The process method for improving SAP preparation efficiency adopts the following steps:

[0028] (1) One-time neutralization: dropwise adding a mass fraction of 25% sodium carbonate solution in acrylic acid, stirring while adding dropwise, when the neutralization degree reaches 25%, add tert-butyl hydroperoxide of 1‰ of acrylic acid quality, After mixing evenly, let it stand for 5 minutes to obtain the mixed solution 1;

[0029] (2) Secondary neutralization: continue to add 20% sodium carbonate solution to the mixed solution 1, and stir while adding it dropwise. Set aside for 5 minutes to obtain the mixed solution 2;

[0030] (3) Three times of neutralization: continue to add 20% sodium carbonate solution to the mixed solution 2, and stir while adding it dropwise. When the neutralization degree reaches 75%, add methanol with acrylic acid mass of 1‰, mix well and let stand for 5 minutes , to obtain the mixed solution 3;

[0031] (4) Four times of neutralization: conti...

Embodiment 2

[0036] A kind of processing method that improves SAP preparation efficiency, adopts following operation steps:

[0037] (1) One-time neutralization: add sodium bicarbonate solution with a mass fraction of 35% to acrylic acid, and stir while adding, until the neutralization degree reaches 30%, add hydrogen peroxide with acrylic acid mass of 10‰, and mix well After standing still for 20min, the mixture 1 was obtained;

[0038] (2) Secondary neutralization: continue to add 30% sodium bicarbonate solution to the mixed solution 1, and stir while adding it dropwise. When the neutralization degree reaches 50%, add glycidyl ether with acrylic acid mass of 10‰, and mix well After standing still for 20min, the mixture 2 was obtained;

[0039] (3) Three times of neutralization: continue to add 30% sodium bicarbonate solution to the mixed solution 2, and stir while adding it dropwise. When the neutralization degree reaches 80%, add ethanol with acrylic acid mass of 10‰, mix well and let ...

Embodiment 3

[0045] A kind of processing method that improves SAP preparation efficiency, adopts following operation steps:

[0046] (1) One-time neutralization: add sodium bicarbonate solution with a mass fraction of 30% to acrylic acid, and stir while adding, until the neutralization degree reaches 27%, add potassium persulfate with acrylic acid mass of 5‰, and mix well After standing still for 15 minutes, the mixed solution 1 was obtained;

[0047] (2) Secondary neutralization: continue to add 25% sodium bicarbonate solution to the mixed solution 1, and stir while adding it dropwise. When the neutralization degree reaches 46%, add trimethoxysilane with an acrylic acid mass of 5‰, and mix After uniformity, let it stand for 15 minutes to obtain the mixed solution 2;

[0048] (3) Three times of neutralization: continue to add 25% sodium bicarbonate solution to the mixed solution 2, and stir while adding it dropwise. When the neutralization degree reaches 78%, add isooctane with acrylic ac...

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Abstract

The invention relates to the technical field of super absorbent polymer preparation, and in particular to a process method for improving SAP (super absorbent polymer) preparation efficiency. The process method includes the steps: (1) first neutralization; (2) second neutralization; (3) third neutralization; (4) fourth neutralization; (5) polymerization; (6) drying and crushing; (7) surface modification. The process method is scientific in preparation and sufficient in product neutralization, the specific surface area of products can be increased when original network structures and strength of the products are not changed in the polymerization process, polymerization degree of the products is stable, polymerization and drying time is shortened, the production efficiency of the products is improved, energy consumption is reduced, and absorption of the products is accelerated.

Description

(1) Technical field [0001] The invention relates to the technical field of high-absorbent resin preparation, in particular to a process method for improving SAP preparation efficiency. (2) Background technology [0002] High-absorbent resin is a kind of relative molecular mass of several thousand or even tens of millions, and its appearance is solid powder; it is used to absorb a large amount of various liquids, and can store more than 50% of the absorbed liquid in high Absorbent resin interior. [0003] In industrial production, the production efficiency of high-absorbent resin is low, and the entire polymerization and drying time are long; moreover, most of the current processes have high temperature and long drying time in the drying process, high energy consumption, and low industrial production efficiency. In order to improve the shortcomings of the above-mentioned processes, extrusion granulation technology is used in the production process at home and abroad. However...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/06C08F2/00C08J9/36
CPCC08F2/00C08F120/06C08J9/36C08J2333/02
Inventor 杨阳马延玉杨志亮
Owner SHANDONG HAOYUE NEW MATERIALS CO LTD
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