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Preparation method of instant cation high molecular weight polyacrylamide

A polyacrylamide and high molecular weight technology, applied in the field of preparation of instant cationic high molecular weight polyacrylamide, can solve the problems of reducing the molecular weight of the polymer, affecting the polymerization performance of acrylamide, unable to prepare high molecular weight polymers, etc. Dissolving speed, the effect of fast dissolving speed

Active Publication Date: 2017-08-11
QINGDAO NATHAN FLOCCULANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the hydrophilicity of carboxyl and sulfonic acid groups is stronger than that of amide groups, it can increase the solubility of polyacrylamide to a certain extent, but the introduction of comonomer carboxyl and sulfonic acid groups will affect the polymerization performance of acrylamide and reduce the polymer Molecular weight, unable to prepare high molecular weight polymers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of instant cationic high molecular weight polyacrylamide, the preparation method mainly includes the following steps: 1) adding 20% ​​by mass of acrylamide aqueous solution into a reactor, adding cationic comonomer DAC and co-solvent carboxymethyl Sodium starch, the amount of DAC is 20% of the mass of acrylamide monomer, the amount of sodium carboxymethyl starch is 0.05% of the mass of acrylamide monomer, and stirred evenly; 2) Nitrogen is introduced to remove the solution and react Oxygen in the container; 3) Add the initiator azobisisobutylamidine hydrochloride, the amount of the initiator is 0.005 mol% of the monomer acrylamide, and react at 55°C for 5 hours to obtain a rubber block; 4) Prepare the After crushing, granulating, drying and pulverizing the obtained rubber blocks, instant cationic high-molecular-weight polyacrylamide particles with a number average molecular weight of 12.5 million are obtained, and the dissolution time of the particle...

Embodiment 2

[0024] A method for preparing instant cationic high molecular weight polyacrylamide, the preparation method mainly includes the following steps: 1) adding 22% by mass of acrylamide aqueous solution into a reactor, adding cationic comonomer DMC and co-solvent starch glycolate Sodium, the amount of DMC is 30% of the mass of acrylamide monomer, the amount of sodium starch glycolate is 0.1% of the mass of acrylamide monomer, and stirred evenly; 3) Add the initiator azobisisopropylimidazoline, the amount of the initiator is 0.05 mol% of the monomer acrylamide, and react at 50°C for 4 hours to obtain the rubber block; 4) The prepared rubber block After crushing, granulating, drying and crushing, instant cationic high-molecular-weight polyacrylamide particles with a number average molecular weight of 13.6 million are obtained, and the dissolution time of the particles is less than 10 minutes.

Embodiment 3

[0026] A method for preparing instant cationic high-molecular-weight polyacrylamide, the preparation method mainly comprising the following steps: 1) adding 24% by mass of acrylamide aqueous solution into a reactor, adding cationic comonomer dimethylaminomethacryloyl Oxyethyltrimethylammonium chloride and cosolvent cross-linked polyvinylpyrrolidone, the amount of dimethylaminomethacryloyloxyethyltrimethylammonium chloride is 45% of the mass of acrylamide monomer, The dosage of the cross-linked polyvinylpyrrolidone is 0.2% of the mass of the acrylamide monomer, and it is stirred evenly; 2) Nitrogen gas is introduced to remove the oxygen in the solution and the reactor; 3) The initiator sodium persulfate is added, and the initiator dosage is 0.08 mol% of monomeric acrylamide, react at 60°C for 8 hours to obtain a rubber block; 4) After crushing, granulating, drying and pulverizing the prepared rubber block, an instant type with a number average molecular weight of 15.2 million is...

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Abstract

The invention discloses a preparation method of instant cation high molecular weight polyacrylamide. The preparation method mainly includes steps of 1), adding 20-40% by mass of acrylamide water solution in a reactor, orderly adding cation comonomer and cosolvent, and evenly stirring; 2), charging nitrogen, and removing oxygen in the solution and reactor; 3), adding initiator and reacting for 1-10 hours at 0-60 DEG C to obtain a glue block; 4), crashing, prilling, drying and smashing the prepared glue block to obtain instant cation high molecular weight polyacrylamide particles. The cosolvent is crosslinking hydrophilic polymer. The preparation method gives consideration to high molecular weight and high solution rate of polyacrylamide. The relative number-average molecular weight of the prepared instant cation high molecular weight polyacrylamide reaches 5 million above; through the function of a crosslinking hydrophilic polymer, the solution rate of the prepared polyacrylamide is very fast and within 10 minutes.

Description

technical field [0001] The invention relates to a preparation method of polyacrylamide, in particular to a preparation method of instant cationic high molecular weight polyacrylamide. Background technique [0002] Polyacrylamide (PAM) is a polymer compound obtained by the polymerization of acrylamide (AM). In a broad sense, PAM includes homopolymers and copolymers of acrylamide, usually containing more than 50% of acrylamide monomer structure The polymer of the unit is called polyacrylamide, and the molecular weight can range from several thousand to tens of millions. According to the ionization of PAM in aqueous solution, it can be divided into nonionic (NonionicPolyacrylamide, NPAM), anionic (AnionicPolyacrylamide, APAM), cationic (CationicPolyacrylamide, CPAM) and amphoteric (AmphotericPolyacrylamide, AmPAM or Zwitterion Polyacrylamide, ZPAM) Four kinds. [0003] At present, polyacrylamide (PAM) is widely used in petroleum exploration, water treatment, chemical industry...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/34C08F2/38C08L3/08C08L39/06C08L1/28C08L33/02
CPCC08F220/56C08L1/284C08L1/286C08L3/08C08L33/02C08L33/26C08L39/06C08F220/34
Inventor 黄叶芳
Owner QINGDAO NATHAN FLOCCULANT
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