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

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 ...

AI Technical Summary

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 new process of distillation, thickening and viscosity-reducing in the preparation process, and provides a high-solid-content and low-viscosity polyacrylamide emulsion. The preparation method of acrylamide emulsion