Preparation method for high-solid-content low-viscosity polyacrylamide emulsion

A technology of polyacrylamide and high solid content, which is applied in the fields of water treatment and oil field chemicals, and can solve the problems of high viscosity of polyacrylamide emulsion products with high solid content, achieve the effects of lower viscosity, lower freezing point, and lower safety hazards

Active Publication Date: 2018-05-18
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • Abstract
  • Description
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Problems solved by technology

[0004] The present invention aims at the defects in the research of the above-mentioned polyacrylamide emulsion, solves the problem of high viscosity of high-solid-content polyacrylamide emulsion products, adds a

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 138 kg of acrylamide, 360 kg of deionized water, and 202 kg of acryloyloxyethyltrimethylammonium chloride solution with a mass ratio of 80% in the preparation kettle, and stir evenly; add 250 kg of dearomatized solvent oil in the emulsification kettle , 30 kg of emulsifier, 400 g of azo initiator, and stir evenly; add the water phase prepared in the preparation kettle into the emulsification kettle for high-speed shear emulsification, and control the temperature of the system at 10-15°C. After the emulsification is completed, pass Use high-purity nitrogen to drive oxygen for 1 hour, keep stirring, and add a solution containing 150 grams of oxidant dropwise during the period. After passing nitrogen to remove oxygen, empty the circulating water bath, and slowly add reducing agent dropwise for 2 hours. Stop adding dropwise when the temperature rises to 40°C , and at the same time pass into a circulating water bath at 40°C, stop stirring, and let it stand for 1 hour. Whe...

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Abstract

The invention relates to a preparation method for a high-solid-content low-viscosity polyacrylamide emulsion. According to the preparation method provided by the invention, a 30%-50% monomer aqueous solution is added into an oil phase system composed of an emulsifier, solvent oil and an azo initiator, a polymerization reaction is performed, the adding amount of a monomer is controlled to account for 20-30% of the total weight of the emulsion, the polymerization heat released in the preparation process is reduced, and the safety hazards are eliminated; and vacuum distillation is performed on the emulsion after polymerization is completed, the water content in the product is reduced, and the solid content of the product is improved. The polyacrylamide emulsion prepared by the preparation method reduces the viscosity and coagulation point of a high-solid-content emulsion product, solves the problems that the high-solid-content emulsion product has residues and accumulation in a medicine adding pump and a pipeline during field use, and finally the blocking is caused, and ensures that the field production is successively performed. The high-solid-content low-viscosity polyacrylamide emulsion product prepared by the method can be widely applied in various fields such as water treatment, papermaking and oil field mining.

Description

technical field [0001] The invention belongs to the fields of water treatment and oil field chemicals, and in particular relates to a preparation method of a polyacrylamide emulsion with high solid content and low viscosity. Background technique [0002] Acrylamide is easy to polymerize to obtain high-molecular-weight polymers. As a linear water-soluble polymer, polyacrylamide can be widely used in water treatment, papermaking, and oil field exploitation. The preparation methods of polyacrylamide mainly include synthetic processes such as aqueous solution polymerization and inverse emulsion polymerization. Among them, inverse emulsion polymerization has the characteristics of easy heat diffusion, easy temperature control, high molecular weight and narrow distribution, and the obtained emulsion product can be dissolved instantaneously. In water, compared with solid polyacrylamide products, which take a long time to dissolve and are difficult to uniform, it is more convenient ...

Claims

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Application Information

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IPC IPC(8): C08F220/34C08F220/56C08F2/32
CPCC08F2/32C08F220/34C08F220/56
Inventor 滕大勇牛心蕙周立山滕厚开宋晓莉赵新星
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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