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A kind of high molecular weight and low residue monopolyacrylamide inverse emulsion and preparation method thereof

A technology of polyacrylamide and high molecular weight, which is applied in the field of high molecular weight and low residue monopolyacrylamide inverse emulsion and its preparation, can solve the problems of long process time, low production efficiency, poor emulsion stability, etc., and achieve short process time, Easy to industrialize and alleviate the effect of long process time

Active Publication Date: 2021-11-09
JIANGSU FEYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems of long process time, low production efficiency and poor emulsion stability in the prior art, provide a high-molecular-weight and low-residue monopolyacrylamide inverse emulsion and its preparation method, which achieves high efficiency, energy saving, industrial Short time, easy to realize industrialization and continuous effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 150g of solid acrylamide, 0.1g of pentasodium diethylenetriaminepentaacetic acid, 8g of urea, 8g of ammonium chloride, and 191g of deionized water into the water phase kettle, dissolve completely under stirring, and adjust the pH of the water phase to 6-7 with acetic acid , which is a non-ionic aqueous solution. Add 9g of Span 80, 9g of Span 60, 7g of Tween 60, and 107.5g of solvent naphtha D-80 into the oil phase kettle, and stir well to form an oil phase solution. Slowly add the water phase to the oil phase under stirring to obtain a water-in-oil pre-emulsion, and then pass nitrogen gas to remove oxygen for 30 minutes. The emulsion system is cooled to 10°C, 0.25g tert-butyl hydroperoxide (oxidant) is added thereto, after stirring evenly, a sodium sulfite solution (reductive agent solution) with a mass concentration of 1% is added dropwise, and the sodium sulfite solution is dripped by regulating and controlling the flow rate and Cooling water flow control Heating...

Embodiment 2

[0029]Add 75g of solid acrylamide, 60g of sodium 2-acrylamide-2-methylpropanesulfonate (functional monomer), 0.1g of disodium edetate, 8g of urea, and 222g of deionized water into the water phase kettle, and stir Dissolve evenly, adjust the pH of the system to about 7, that is, the aqueous phase solution. Add 18g of Span 80, 12g of Tween 80, and 90g of industrial white oil 7# into the oil phase kettle, and stir well to form an oil phase solution. Slowly add the water phase to the oil phase under stirring to obtain a water-in-oil pre-emulsion. After the addition is complete, pass nitrogen gas to remove oxygen for 0.5 h. Emulsion system is cooled to 8 DEG C, add 0.15g Potassium Bromate (oxidizing agent), mix uniformly, dropwise add mass concentration 0.05% sodium bisulfite solution (reductive agent solution), and add dripping flow rate and The cooling water flow is used to control the heating rate: below 40°C, control the rise of 1.5±0.1°C per minute, when it reaches 40°C, cont...

Embodiment 3

[0032] Add 105g of solid acrylamide, 0.1g of pentasodium diethylenetriaminepentaacetate, 3g of citric acid, 45g of acryloyloxyethyltrimethylammonium chloride with a mass concentration of 80%, and 197.5g of deionized water into the water phase kettle , dissolve completely, and adjust the pH of the system to 3-4 with 50% sulfuric acid solution to obtain an aqueous phase solution. Add 8.8g of Span 80, 16.2g of Tween 81, 50g of industrial white oil 5#, and 55g of solvent oil D-65 into the oil phase kettle, and stir well to form an oil phase solution. Add the water phase to the oil phase under stirring to obtain a water-in-oil pre-emulsion, and then pass nitrogen gas to remove oxygen for 0.5 h. Cool the emulsion system to 12°C, add 0.05g of ammonium persulfate, stir for 10 minutes, add dropwise sodium metabisulfite solution with a mass concentration of 0.5%, and control the heating rate by adjusting the dripping flow rate of sodium metabisulfite solution and cooling water flow rate...

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Abstract

The invention discloses a high-molecular-weight and low-residue monopolyacrylamide inverse emulsion and a preparation method thereof. The water-in-oil pre-emulsion is prepared by dropping an aqueous phase solution containing acrylamide or acrylamide and a functional monomer into an oil phase solution, A water-in-oil pre-emulsion is obtained; the oil phase solution is prepared as follows: adding a nonionic emulsifier and solvent oil into an oil phase kettle, and stirring evenly. After passing nitrogen and deoxygenating the water-in-oil pre-emulsion, add an oxidizing agent, and then add a reducing agent solution; after the reaction is completed, add a photoinitiator, and irradiate the reaction solution under ultraviolet light to obtain a high-molecular-weight and low-residue Polyacrylamide inverse emulsion. The method proposed by the invention is applicable to the preparation of various types of polyacrylamide inverse emulsion products, such as nonionic polyacrylamide emulsion, anionic polyacrylamide emulsion, cationic polyacrylamide emulsion, and amphoteric polyacrylamide emulsion. The prepared products are widely used in water treatment, oil and gas exploitation, mineral flotation, pulp and paper making and other fields.

Description

technical field [0001] The invention relates to the technical field of acrylamide inverse emulsion polymerization, in particular to a high-molecular-weight and low-residue monopolyacrylamide inverse emulsion and a preparation method thereof. Background technique [0002] Polyacrylamide emulsion products are widely used in water treatment, oil fields, mineral processing, papermaking and other fields due to their advantages such as fast dissolution, no moisture absorption and caking, and convenient storage and use. In recent years, with the development of industrial technology, the demand for polyacrylamide emulsion products with high molecular weight (molecular weight ≥ 10 million) has been increasing, especially in the flocculation of sewage and sludge, oil and gas extraction, and paper retention aids. Acrylamide, on the other hand, is a chemical that can cause neurotoxicity when exposed in high doses. On October 27, 2017, in the list of carcinogens released by the Internat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/56C08F220/56C08F220/58C08F220/06C08F220/34C08F4/40C08F2/32C08F2/48
CPCC08F2/32C08F2/48C08F4/40C08F120/56C08F220/06C08F220/56C08F220/34
Inventor 刘竹青何国锋徐志新戴明明王勤魏星光罗依婷
Owner JIANGSU FEYMER TECH
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