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Non-ionic polyacrylamide as well as preparation method and application thereof

A polyacrylamide, non-ionic technology, used in the chemical industry, can solve the problems of unfavorable particle subsidence, poor flocculation effect, low molecular weight, etc., and achieve the effect of low initiator dosage, mild reaction conditions and large molecular weight

Inactive Publication Date: 2017-10-20
罗山县中原聚合物有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The range of application of non-ionic polyacrylamide depends largely on the relative molecular weight. High molecular weight PAM is an important flocculant, which has good adhesion to many microclusters and dissolved substances in sewage, but the existing Most polyacrylamides have low molecular weight, low viscosity, and poor dissolution rate, which is not conducive to particle sinking and poor flocculation effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The present embodiment provides a kind of preparation method of nonionic polyacrylamide, it comprises the following steps:

[0028] The semi-finished product is prepared according to the mass ratio of 100:0.01, taking acrylamide monomer and photoinitiator, mixing the acrylamide monomer and deionized water to prepare an aqueous solution of acrylamide with a mass fraction of 16%; Next, the acrylamide aqueous solution and the photoinitiator were mixed evenly, and reacted for 2 hours to obtain a non-ionic polyacrylamide semi-finished product; wherein, the photoinitiator was benzaldehyde benzoin dimethyl ether;

[0029] Finished product preparation At 80-90°C, according to the mass ratio of 1000:7, add urea to the polyacrylamide semi-finished product, mix evenly, and react for 2 hours to prepare non-ionic polyacrylamide.

Embodiment 2

[0031] This example provides a method for preparing nonionic polyacrylamide. The difference between this example and Example 1 is that the photoinitiator is azodietherpropane hydrochloride.

Embodiment 3

[0033] The present embodiment provides a kind of preparation method of nonionic polyacrylamide, it comprises the following steps:

[0034] The preparation of semi-finished products takes acrylamide monomer and redox initiator according to the mass ratio of 100:0.03, mixes the acrylamide monomer and deionized water to prepare an acrylamide aqueous solution with a mass fraction of 19%; Under the conditions, the acrylamide aqueous solution and the redox initiator were mixed uniformly, and reacted for 3 hours to obtain a non-ionic polyacrylamide semi-finished product; wherein, the redox initiator included ammonium persulfate and sodium bisulfite, and the over The molar ratio of ammonium sulfate and sodium bisulfite is 1:1;

[0035] Finished product preparation At 80-90°C, according to the mass ratio of 1000:10, add urea to the polyacrylamide semi-finished product and mix evenly, and react for 2.5 hours to prepare non-ionic polyacrylamide. Polyacrylamide is successively crushed, g...

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Abstract

The invention provides a preparation method of non-ionic polyacrylamide. The preparation method comprises the following steps: uniformly mixing acrylamide aqueous solution and an inhibiting agent at the temperature of 15-35 DEG C for reaction for 2-3h, so as to obtain a non-ionic polyacrylamide semi-finished product; adding urea into the non-ionic polyacrylamide semi-finished product at the temperature of 80-90 DEG C and uniformly mixing the mixture for reaction for 2-3h, so as to obtain the non-ionic polyacrylamide. Meanwhile, the invention further provides the non-ionic polyacrylamide prepared with the method. The non-ionic polyacrylamide has the advantages of being large in molecular weight and high in dissolving speed and can be used for various fields as a flocculating agent, therefore, the non-ionic polyacrylamide has wide application prospects.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a nonionic polyacrylamide and its preparation method and application. Background technique [0002] Nonionic polyacrylamide is a water-soluble polymer or polyelectrolyte. Because its molecular chain contains a certain number of polar groups, it can absorb solid particles suspended in water to bridge between particles or agglomerate particles to form large flocs through charge neutralization. Therefore, it can accelerate the settling of particles in the suspension, and has a very obvious effect of accelerating solution clarification and promoting filtration. It is mainly used for flocculation and sedimentation of various industrial wastewater, and sedimentation and clarification treatment. Such as papermaking and pulp wastewater treatment, wastewater treatment in mineral processing and metal smelting process, wastewater treatment in steel mills and stone processing p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/56C08F8/32C08F4/40C08F2/48C02F1/56
CPCC08F8/32C02F1/56C08F2/48C08F4/40C08F120/56
Inventor 余荣和余梦郭瀚程
Owner 罗山县中原聚合物有限公司
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