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Preparation method of ternary copolymerized cationic polyacrylamide

A polyacrylamide and cation technology, applied in the field of polyacrylamide preparation, can solve problems such as lack of methods, and achieve the effects of stable copolymerization reaction, easy industrialization implementation, and high relative molecular mass of products

Active Publication Date: 2018-11-09
中科乐美科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the particularity of the reactivity of several monomers of DMDAAC, MAPTAC and AM ternary copolymerization, there is still a lack of industrial production methods for preparing ternary copolymerization DMDAAC, MAPTAC and AM cationic polyacrylamide

Method used

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  • Preparation method of ternary copolymerized cationic polyacrylamide
  • Preparation method of ternary copolymerized cationic polyacrylamide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) In an insulated stirred tank with a cooling coil, add 41.67kg of 60% dimethyl diallyl ammonium chloride and 50kg of 50% methacrylamidopropyl trimethyl ammonium chloride , 950kg acrylamide crystals, 100g trisodium nitrilotriacetate, 1kg adipic acid, 2kg urea, 40kg sodium chloride and 2915kg industrial pure water.

[0025] (2) Stir at room temperature. After all the materials are fully dissolved, adjust the pH value to 5.5 with phosphoric acid, and cool the reaction solution to 5°C.

[0026] (3) Transfer the reaction solution into the heat preservation reaction kettle, and after opening nitrogen to drive oxygen for more than 40 minutes, add 20 g of sodium formate, 500 g of azobisisobutyronitrile, 10 g of potassium persulfate, 20 g of sodium formaldehyde sulfoxylate, and 15 g of ferrous sulfate , the dosing interval is 2 minutes, continue to pass nitrogen, when the reaction system becomes viscous and the temperature starts to rise, stop nitrogen flow, close the heat pr...

Embodiment 2

[0030] (1) In the heat-insulated stirred tank with cooling coil, add 133kg content and be 60% dimethyl diallyl ammonium chloride and 40kg content be 50% methacrylamidopropyl trimethyl ammonium chloride, 900kg of acrylamide crystals, 200g of trisodium nitrilotriacetate, 1.5kg of adipic acid, 3kg of urea, 30kg of sodium chloride and 2666kg of industrially pure water.

[0031] (2) Stir at room temperature. After all the materials are fully dissolved, adjust the pH value to 5.0 with phosphoric acid, and cool the reaction solution to 5°C.

[0032](3) The reaction solution is transferred to the heat preservation reaction kettle, and after opening nitrogen to drive oxygen for more than 40min, 22g of sodium hypophosphite, 1.5kg of azobisisobutyronitrile, 15g of potassium persulfate, 35g of sodium formaldehyde sulfoxylate, Ferrous sulfate 25g, the dosing interval is 5min, continue to pass nitrogen, when the reaction system becomes sticky and the temperature starts to rise, stop nitroge...

Embodiment 3

[0036] (1) In the heat-insulated stirred tank with cooling coil, add 267kg content and be 60% dimethyl diallyl ammonium chloride and 80kg content be 50% methacrylamidopropyl trimethyl ammonium chloride, 800kg of acrylamide crystals, 250g of trisodium nitrilotriacetate, 2kg of adipic acid, 2.5kg of urea, 40kg of sodium chloride and 2380kg of industrially pure water.

[0037] (2) Stir at room temperature. After all the materials are fully dissolved, adjust the pH value to 4.5 with phosphoric acid, and cool the reaction solution to 5°C.

[0038] (3) The reaction solution is transferred to the heat preservation reaction kettle, and after opening the nitrogen gas to drive the oxygen for more than 40min, add 28g of sodium hypophosphite, 2.0kg of azobisisobutyronitrile, 30g of potassium persulfate, 80g of sodium formaldehyde sulfoxylate, Ferrous sulfate 65g, the dosing interval is 4min, continue to pass nitrogen, when the reaction system becomes sticky and the temperature starts to r...

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Abstract

The invention discloses a preparation method of ternary copolymerized cationic polyacrylamide, including the following steps: stirring to dissolve cationic monomer diallyl dimethyl ammonium chloride,methacrylamide, propyl trimethylammonium chloride, nonionic monomer acrylamide, a metal ion chelating agent, and a chaotropic agent in water, adding a chain transfer agent and an initiating agent in turn after injecting nitrogen for removing oxygen, which evenly mixes the chain transfer agent and initiating agent and reaction liquid by effect of the nitrogen flow to obtain the ternary copolymerized cationic polyacrylamide colloid product, obtaining the colloidal particles by prilling the colloid product, adding anti-crosslinking agent solution into the colloidal particles for mixing, drying and milling the colloidal particles into powder, after sieving, obtaining powder product of the ternary copolymerized cationic polyacrylamide. The ternary copolymerized cationic polyacrylamide has significant hydrolysis resistance property, flocculent property is maintained and improved, the product economy is optimized relative to copolymerized products of MAPTAC and acrylamide. The method is applicable to large kettle production, which is easy to implement industrialization.

Description

technical field [0001] The invention relates to a preparation method of polyacrylamide, in particular to a preparation method of ternary copolymerized cationic polyacrylamide. Background technique [0002] Cationic polyacrylamide is currently one of the water-soluble polymers with the largest amount and the widest application range. It has a wide range of applications in many fields such as water treatment, oil recovery, papermaking, and textiles. Because cationic polyacrylamide is positively charged, it can combine with negatively charged particles in water to play the role of neutralization and adsorption bridging. It is very suitable for the treatment of industrial wastewater such as printing and dyeing, papermaking, oily wastewater, etc. Used as flocculant in sludge dewatering treatment. At present, the commonly used cationic polymers are mainly obtained by the copolymerization reaction of acrylamide monomer (AM) and cationic monomers. Among them, dimethyl diallyl ammon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/60C08F226/02
CPCC08F220/56C08F226/02C08F220/60
Inventor 李潇潇陈林郑康田兴友袁云万安术曹宇翔耿南桥梁俊杰高丽
Owner 中科乐美科技集团有限公司
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