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Fast-dissolving cationic polyacrylamide and preparation method thereof

A polyacrylamide and cationic technology, which is applied in the field of cationic polyacrylamide and its preparation, can solve the problems of shortening the dissolution rate of cationic polyacrylamide with high molecular weight and low dissolution rate of cationic polyacrylamide, and achieve the goal of insoluble matter and the effects of low residual monomer content, shortened dissolution time, and fast reaction speed

Active Publication Date: 2019-12-03
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 problem of low dissolution rate of high-molecular-weight cationic polyacrylamide in the prior art, provide a kind of instant cationic polyacrylamide and its preparation method, and achieve shortening of high-molecular-weight cationic polyacrylamide. The effect of the dissolution rate of polyacrylamide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In the reactor, 2g polyethylene oxide, 258g mass fraction 40% polyacrylamide solution, 38.5g mass fraction 80% acryloyloxyethyltrimethylammonium chloride (cationic monomer), 8g methyl acrylate (weak polar monomer), 0.06g disodium ethylenediaminetetraacetic acid, 1g urea join in 194g deionized water, stir and dissolve evenly; Then 0.006g Irgacure2959 (photoinitiator), 0.048g Darocur 1173 (photoinitiator ) was added to 1.4g ethanol (chain transfer agent) and stirred to dissolve evenly; the above-mentioned two solutions were mixed and stirred evenly, and the pH was adjusted to 4. After nitrogen gas was introduced for 30 minutes, it was irradiated under a 254nm ultraviolet lamp for 25min, and then placed under a 365nm ultraviolet lamp. After irradiating for 80 minutes, the rubber block was taken out, and after granulation, drying, crushing and drying, a cationic polyacrylamide with a molecular weight of 15.35 million, an insoluble content of 0.01%, a residual monomer content...

Embodiment 2

[0025] 1.5g polyethylene oxide, 263g mass fraction 40% polyacrylamide solution, 40g mass fraction 80% dimethyl diallyl ammonium chloride (cation monomer), 7g methyl methacrylate (weak polarity Monomer), 0.055g disodium edetate, 0.8g urea were added to 180g deionized water, stirred and dissolved evenly; then 0.008g Irgacure2959 (photoinitiator), 0.05g Darocur 1173 (photoinitiator) was added to Stir and dissolve in 1.2g of isopropanol (chain transfer agent) evenly; mix and stir the above two solutions evenly, adjust the pH to 4, pass in nitrogen gas for 20 minutes, irradiate for 20 minutes under a 254nm ultraviolet lamp, and then place it under a 365nm ultraviolet lamp After irradiating for 90 minutes, the rubber block was taken out, and after granulation, drying, crushing and drying, a cationic polyacrylamide with a molecular weight of 8.52 million, an insoluble content of 0.005%, a residual monomer content of 637ppm and a dissolution time of 24 minutes was obtained.

Embodiment 3

[0027] 1.5g polyethylene oxide, 268g mass fraction 40% polyacrylamide solution, 42g mass fraction 80% methacryloxyethyltrimethylammonium chloride (cationic monomer), 6.5g ethyl acrylate (weak Polar monomer), 0.055g disodium edetate, 1g urea were added to 172g deionized water, stirred and dissolved evenly; then 0.001g BP (photoinitiator), 0.056g Darocur 1173 (photoinitiator) Add to 1.1g of methanol (chain transfer agent) and stir to dissolve evenly; mix and stir the above two solutions evenly, adjust the pH to 3.5, pass in nitrogen gas for 20min, irradiate for 25min under a 254nm ultraviolet lamp, and then place it under a 365nm ultraviolet lamp After irradiating for 90 minutes, the rubber block was taken out, and after granulation, drying, crushing and drying, a cationic polyacrylamide with a molecular weight of 7.83 million, an insoluble content of 0.003%, a residual monomer content of 542ppm and a dissolution time of 20 minutes was obtained.

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Abstract

The invention discloses fast-dissolving cationic polyacrylamide and a preparation method thereof. The method comprises the following steps: mixing a polyacrylamide solution, a cationic monomer solution, a weakly polar monomer, deionized water, disodium ethylenediamine tetraacetate, polyethylene oxide and urea to prepare a solution A; adding a photoinitiator into a chain transfer agent, performinguniform dissolution under stirring to prepare a solution B; uniformly mixing the solution A and the solution B under stirring to obtain a reaction solution; and adjusting the pH of the reaction solution to 3-6, introducing nitrogen for deoxygenation, performing irradiation under a short-wave ultraviolet lamp, performing irradiation under a long-wave ultraviolet lamp, cutting the prepared rubber block, performing granulation, performing drying, and performing crushing to obtain the fast-dissolving cationic polyacrylamide. The method provided by the invention greatly shortens the dissolution time of the cationic polyacrylamide, improves the use efficiency of the cationic polyacrylamide in industries such as water treatment, sludge dewatering, mineral dressing by washing, oil and gas extraction and papermaking, and has huge potential application value.

Description

technical field [0001] The invention belongs to the field of polyacrylamide preparation, in particular to a cationic polyacrylamide with fast dissolving performance and a preparation method thereof. Background technique [0002] Polyacrylamide contains highly polar amide side groups, has good water solubility, and can be miscible with water in any ratio. Among them, the cationic polyacrylamide formed by copolymerization with cationic monomers has a strong ability to attract and neutralize anions, and is often used in water treatment, sludge dewatering, papermaking, mineral processing, oil and gas extraction, metallurgy and building materials and other industries. [0003] With the needs of industrial development, the molecular weight of cationic polyacrylamide products is getting higher and higher, but high molecular weight and fast dissolution are often mutually opposing conditions. Most high-molecular-weight cationic polyacrylamide products need to be dissolved for a long...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/10C08F220/34C08F220/18C08F220/14C08F226/02C08F2/48
CPCC08F265/10C08F2/48C08F220/34C08F220/14C08F226/02
Inventor 李平夏成波汤玉业方叔迈耿丽霞
Owner JIANGSU FEYMER TECH
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