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Hydrolyzed polyacrylamide with ultra-high molecular weight and preparation method thereof

A technology of ultra-high molecular weight polyacrylamide, which is applied in the field of hydrolyzed polyacrylamide and its preparation, can solve the problems of ultra-high molecular weight and product solubility, and achieve the advantages of inhibiting tertiary carbon coupling and crosslinking, low production cost and simple process Effect

Active Publication Date: 2010-04-21
ANHUI JUCHENG FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is how to solve the contradiction between ultra-high molecular weight and product solubility

Method used

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  • Hydrolyzed polyacrylamide with ultra-high molecular weight and preparation method thereof
  • Hydrolyzed polyacrylamide with ultra-high molecular weight and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] (1) Add acrylamide accounting for 23% of the reaction system with a concentration of 25-30% and sodium carbonate accounting for 8.5% of the reaction system into deionized water accounting for 68.5% of the reaction system under stirring, and then add the 0.003% of isopropanol, 0.02% of EDTA-Na and 0.004% of ethylene glycol in the reaction system are fully mechanically stirred until the solution is clarified to obtain a homopolymer solution without solid insolubles, which is adjusted to PH=8~9.

[0040] (2) Put the above-mentioned homopolymer liquid into an ice-water bath and cool it to 8-10°C, put it into the polymerization reactor, and pass high-purity nitrogen gas for 30 minutes, then add 0.003% potassium persulfate as an oxidizing agent, and 0.003% sodium sulfite as a reducing agent. %, auxiliary agent urea 0.006% redox initiation system to initiate co-hydrolysis of homopolymerization, continue to feed high-purity nitrogen for 5 minutes and then stop nitrogen filling,...

Embodiment 2

[0043](1) Add acrylamide with a concentration of 25-30% of 25% of the reaction system and sodium sulfate of 8.5% of the reaction system into deionized water of 66% of the reaction system under stirring to dissolve them, and then add the 0.006% of the 2-thiobenzimidazole in the system, 0.05% of the EDTA-Na in the reaction system and 0.008% of the ethylenediamine in the reaction system are fully mechanically stirred until the solution is clear and has no solid insoluble homopolymer solution. Add 5% NaOH is adjusted to PH=9~10.

[0044] (2) Put the above-mentioned homopolymer liquid into an ice-water bath and cool it down to 5-9°C, put it into a polymerization reactor, feed high-purity nitrogen for 30 minutes, and then add 0.006% of oxidant sodium persulfate and reducing agent potassium sulfite The redox initiation system composed of 0.006% and 0.012% additive urea initiates homopolymerization and cohydrolysis. After continuing to pass high-purity nitrogen for 5 minutes, stop nit...

Embodiment 3

[0047] (1) Add acrylamide accounting for 27% of the reaction system with a concentration of 25% to 30% and sodium carbonate accounting for 9.5% of the reaction system into deionized water accounting for 63% of the reaction system to dissolve them, and then add Reaction system 0.08% chain transfer agent mercaptan, EDTA-Na accounting for 0.008% of reaction system and N, N-dimethylamide accounting for 0.01% of reaction system, fully mechanically stirred until the solution is clear, and a homogeneous solution without solid insolubles is obtained. Polymerize and adjust the pH to 8-11 with 5% NaOH.

[0048] (2) Put the above-mentioned homopolymer liquid into an ice-water bath and cool it to 7-8°C, put it into a polymerization reactor, pass high-purity nitrogen gas into it for 28 minutes to expel oxygen, and then add 0.08% oxidant ammonium persulfate, reducing agent three The redox initiation system composed of 0.08% ethanolamine and 0.05% urea as an auxiliary agent initiates co-hydr...

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Abstract

The invention discloses hydrolyzed polyacrylamide with ultra-high molecular weight and a preparation method thereof. In the method, an alkaline homopolymerization cohydrolysis method is adopted; 20 to 30 percent acrylamide aqueous solution is taken as a parent; and substances such as a hydrolytic agent, a chain transfer agent, an organic cosolvent and the like are added to the parent to undergo homopolymerization cohydrolysis under the initiation of a redox initiation system. The preparation method has simple and convenient process, low equipment investment and production cost, uniform hydrolyzing degree of a product and narrow distribution of the molecular weight; the molecular weight reaches up to between 2,000 and 25,000,000, and the hydrolyzing degree reaches between 35 and 50 percent; the hydrolyzed polyacrylamide can be widely used in the fields of municipal wastewater, industrial wastewater, oredressing wastewater, oil field exploitation and the like.

Description

1. Technical field [0001] The invention relates to a hydrolyzed polyacrylamide (HPAM) and a preparation method thereof, in particular to an ultrahigh molecular weight hydrolyzed polyacrylamide (HPAM) and a preparation method thereof. 2. Background technology [0002] Polymer polyacrylamide has become an important water treatment chemical to improve the efficiency of domestic and industrial wastewater treatment, and has been widely used. However, due to the branched and cross-linked branches on the molecular chain of polyacrylamide, the adsorption and bridging effect in wastewater treatment is weakened, and the flocculation force is reduced. In order to reduce and reduce the branching and cross-linking of the polyacrylamide molecular chain, the polymer must be modified. The properties of the modified polymer include high molecular weight, high viscosity, less branching and cross-linking, and high concentration The adaptability of COD and SS treatment maximizes its flocculati...

Claims

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Application Information

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IPC IPC(8): C08F120/56C08F8/12
Inventor 刘纯波方晖段百军吴浩徐强
Owner ANHUI JUCHENG FINE CHEM
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