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Preparation method of ultrahigh-molecular-weight polyacrylamide

A technology of polyacrylamide and ultra-high molecular weight, which is applied in the field of preparation of ultra-high molecular weight polyacrylamide, can solve the problems that it is difficult to stably prepare ultra-high molecular weight polyacrylamide, and the reaction temperature is difficult to control uniformly, and achieves High yield, stable polymerization reaction temperature and simple process

Active Publication Date: 2015-09-30
ZHEJIANG XINYONG BIOCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the influence of process conditions, such as the difficulty of controlling the uniform local reaction temperature, it is currently difficult to stably produce polyacrylamide with ultra-high molecular weight. How to obtain polyacrylamide with ultra-high molecular weight has become the focus of current research.

Method used

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  • Preparation method of ultrahigh-molecular-weight polyacrylamide
  • Preparation method of ultrahigh-molecular-weight polyacrylamide

Examples

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Effect test

Embodiment 1

[0020] A preparation method of ultra-high molecular weight polyacrylamide includes the following steps:

[0021] 1) Prepare an aqueous solution of acrylamide with a mass fraction of 27% and a temperature of 0°C;

[0022] 2) Add the acrylamide aqueous solution prepared in step 1) to a reactor equipped with an in-liquid heat conduction device, such as Figure 1-2 As shown, the in-liquid heat conduction device includes a circular substrate 1, on which a plurality of layers of annular hole arrays concentric with the circular substrate 1 are provided; each hole of the annular hole array is provided with a circular substrate 1 1 Vertical straight water pipe 2; The circular base plate 1 is also provided with a stirrer shaft 3 connected to the stirrer and penetrates the center of the circular base plate 1, and an annular water pipe 4 surrounding the side wall of the circular base plate 1; inside the straight water pipe 2 A partition plate 5 is provided for dividing the straight water pipe...

Embodiment 2

[0030] A preparation method of ultra-high molecular weight polyacrylamide includes the following steps:

[0031] 1) Prepare an aqueous solution of acrylamide with a mass fraction of 28% and a temperature of 2°C;

[0032] 2) Add the acrylamide aqueous solution prepared in step 1 to a reactor equipped with an in-liquid heat conduction device, such as Figure 1-2 As shown, the in-liquid heat conduction device includes a circular substrate 1, on which a plurality of layers of annular hole arrays concentric with the circular substrate 1 are provided; each hole of the annular hole array is provided with a circular substrate 1 1 Vertical straight water pipe 2; The circular base plate 1 is also provided with a stirrer shaft 3 connected to the stirrer and penetrates the center of the circular base plate 1, and an annular water pipe 4 surrounding the side wall of the circular base plate 1; inside the straight water pipe 2 A partition plate 5 is provided for dividing the straight water pipe ...

Embodiment 3

[0040] A preparation method of ultra-high molecular weight polyacrylamide includes the following steps:

[0041] 1) Prepare an aqueous acrylamide solution with a mass fraction of 27% and a temperature of 3°C;

[0042] 2) Add the acrylamide aqueous solution prepared in step 1 to a reactor equipped with an in-liquid heat conduction device, such as Figure 1-2 As shown, the in-liquid heat conduction device includes a circular substrate 1, on which a plurality of layers of annular hole arrays concentric with the circular substrate 1 are provided; each hole of the annular hole array is provided with a circular substrate 1 1 Vertical straight water pipe 2; The circular base plate 1 is also provided with a stirrer shaft 3 connected to the stirrer and penetrates the center of the circular base plate 1, and an annular water pipe 4 surrounding the side wall of the circular base plate 1; inside the straight water pipe 2 A partition plate 5 is provided for dividing the straight water pipe 2 i...

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Abstract

The invention discloses a preparation method of ultrahigh-molecular-weight polyacrylamide. The preparation method comprises the following steps: (1) preparing an acrylamide aqueous solution; (2) adding the acrylamide aqueous solution into a reactor provided with a liquid internal heat conduction device, introducing water of 6-7 DEG C into a water filling nozzle of the liquid internal heat conduction device, starting a stirrer of the liquid internal heat conduction device, introducing nitrogen to remove oxygen, and adding an initiating agent to perform polymerization reaction, thereby preparing a polymerization product; and (3) cutting and granulating the polymerization product, and then adding the polymerization product into a hydrolyzer to perform hydrolysis reaction, thereby preparing ultrahigh-molecular-weight polyacrylamide. According to the preparation method disclosed by the invention, by adopting reasonable proportioning, combining corresponding process conditions and adopting the self-made liquid internal heat conduction device to uniformize the reaction temperature and stabilize the molecular weight of polyacrylamide, the molecular weight of prepared polyacrylamide reaches 3.4*10<7>.

Description

Technical field [0001] The invention relates to a preparation method of ultra-high molecular weight polyacrylamide. Background technique [0002] Polyacrylamide (PAM) is a water-soluble polymer. In recent years, PAM has been widely used in petroleum, chemical, metallurgy, paper, textile, water treatment and other industrial sectors, and the demand is increasing year by year; from the beginning of non-ionic polyacrylamide (NPAM) to the current anionic polyacrylamide (APAM) , Cationic polyacrylamide (cPAM) and amphoteric polyacrylamide (AmPAM); from the original low and medium molecular weight polymers to high molecular weight polymers. In recent years, ultra-high molecular weight polyacrylamide (HPAM) has become a research hotspot at home and abroad due to its excellent properties in flocculation. However, due to factors such as the difficulty of controlling the uniformity of the local reaction temperature due to the influence of process conditions, it is currently difficult to ...

Claims

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Application Information

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IPC IPC(8): C08F120/56C08F8/12C08F2/01
Inventor 张虎寅尹金梅庄贤军张文宇
Owner ZHEJIANG XINYONG BIOCHEM
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