Polyacrylamide microsphere pipeline emulsifier

Polyacrylamide and its derivatives are a widely used class of water-soluble polymer materials, which can be used as coagulants, paper reinforcement agents, and retention and filtration aids. They have been applied in fields such as water treatment, papermaking, and petroleum extraction. Cross linked polyacrylamide microspheres have properties such as water absorption, retention, and swelling.The emulsifier adopts a German Bergmann double end mechanical seal, which can operate continuously for 24 hours while ensuring cooling water. However, it is difficult for ordinary emulsifiers to operate continuously for a long time, and ordinary emulsifiers cannot withstand high-speed operation. It can handle large quantities, operate more smoothly, and is more convenient, suitable for industrial online continuous production. The particle size distribution range is narrow, the dispersion effect is good, and there are no dead corners. The material is cut through dispersion.

At present, polymer microspheres are mainly obtained by physical and chemical methods. Chemical methods mainly include dispersion polymerization, seed polymerization, suspension polymerization, lotion polymerization, etc. However, currently these chemical methods inevitably require the use of a large amount of emulsifiers and organic solvents in the preparation process, resulting in increased production costs and significant environmental pressure.

A polyacrylamide microsphere prepared by the Hyde mechanical method

1) Firstly, a crosslinking agent is added to water for infiltration, swelling, and stripping, forming an aqueous solution containing sheet-like crosslinking agent. Then, the aqueous solution containing sheet-like crosslinking agent is added to an aqueous solution containing a dispersion medium, and the resulting mixed solution is stirred evenly and emulsified. Stabilizers and monomers are added to the above mixed solution again, and the temperature is raised to completely dissolve the above substances, obtaining a pre polymer solution;

2) Add an initiator to the pre polymerization solution at 30-55 ° C to initiate polymerization, with a polymerization time of 15 Mh, to obtain polyacrylamide microspheres; The above components and their weight content are monomers, accounting for 10-20% of the weight of water; Crosslinking agent, accounting for 0% of the weight of water 05-0. 6% ； Stabilizer, accounting for 0% of the weight of water 2-2% ； Initiator, accounting for 0% of the weight of water 0001-0. 008% ； Dispersion medium, accounting for 20-59% of the weight of water; The monomer is a non-ionic monomer acrylamide, or a mixture of non-ionic monomer acrylamide and cationic or anionic monomers; The stabilizer is a linear polymer of cationic or anionic monomers; When a mixture of non-ionic monomer acrylamide and cationic monomer or anionic monomer is selected as the monomer, the mass ratio of cationic monomer or anionic monomer to non-ionic monomer acrylamide is 0.151, and the ion type of the monomer selected is the same as that of the monomer used for stabilizer polymerization; The cationic monomer is at least one of the following structures

A pipeline type ultra-high shear emulsifier is a device that efficiently, quickly, and uniformly transports one or more phases (liquid, solid, gas) into another immiscible continuous phase (usually liquid). Under normal circumstances, each phase is immiscible with each other. When external energy is input, the two materials recombine into a homogeneous phase. Due to the strong kinetic energy brought by the high tangent speed and high-frequency mechanical effect generated by the high-speed rotation of the rotor, the materials are subjected to strong mechanical and hydraulic shearing, centrifugal extrusion, liquid layer friction, impact tear and turbulence in the narrow gap between the stator and rotor, forming suspension (solid/liquid), lotion (liquid/liquid) and foam (gas/liquid). Thus, the immiscible solid, liquid, and gas phases can be dispersed and emulsified uniformly and finely in an instant under the combined action of corresponding mature processes and appropriate additives. After high-frequency cycling, stable high-quality products can be obtained.

The pipeline type ultra-high shear emulsifier consists of 1-3 working chambers. Under the high-speed drive of the motor, the material moves at high speed in the narrow gap between the rotor and stator, forming turbulent flow. The material is subjected to stronger hydraulic shear, centrifugal extrusion, high-speed cutting, impact, and grinding, achieving the effects of dispersion, emulsification, and crushing. The particle size distribution range, homogenization and refinement effects, and yield are determined by the physical properties of the processed material, the number of working chambers, and the duration of material residence in the working chamber. High rotational speed and shear rate are crucial for obtaining ultrafine suspensions. According to some industry specific requirements, Xide Company has developed the XRS2000 ultra high speed shear dispersing emulsifier based on the XR2000 series. Its shear rate can exceed 10.000 rpm, and the rotor speed can reach 40m/s. Within this speed range, turbulence caused by shear forces combined with specially developed motors can reduce the particle size range to the nanometer level. The shear force is stronger, and the particle size distribution of lotion is narrower. Due to its extremely high energy density, no other auxiliary dispersing equipment is required.

The following is a model table for reference:

Polyacrylamide microsphere pipeline emulsifier