Polymer Microencapsulation Of Oil Drag Reduction And In The Scale-up Process

Room temperature, Polymer drag reduction of oil does not have Crystalline in the viscoelastic state,in order to prevent bonding the surface of polymer particles in the drag reduction, to facilitate oil production, storage, use, transport of Oil DRA.In order to avoid blocking the adhesion of polymer particles, we often use chemical, physical, physical chemistry in the surface of the particles coated with other materials, which were prepared under the conditions in the long-term storage at room temperature particles. Microencapsulation involves the knowledge of colloid chemistry, but also the use of polymer physics, polymer chemistry and other subjects related to theory, study its industrial applications, but also by chemical engineering approach to the design process, optimize the process route.This paper summarizes the development of DRA applications in the pipeline and the development trend of production technology. Analysis of the preparation of the microcapsules wall material, the core material, and the preparation and release rate, demonstrated that the factors affecting preparation of microcapsules:1) surfactant2) the choice of dispersant3) DRA particle size. Microcapsules was prepared by in situ polymerization and interfacial polymerization, microcapsules was carried out in the scale-up and performance testing.Drag reduction of polymer micro-capsules were prepared by in situ polymerization, wall material monomer is urea, formaldehyde, dispersant is water,The key to the process of microencapsulation in this method is the stirring speed control parameter the speed is too low can not make the wall material and core material mixing, the speed is too high would undermine the urea-formaldehyde resin in the drag reduction of polymer particles formed on the surface of the shell. As one step easy to operate, suitable for industrialization.Drag reduction of polymer micro-capsules were prepared by in Interfacial polymerization, This method of wall material is the2,4-toluene diisocyanate (TDI) and glycerol, isocyanate (-NCO) and hydroxyl (-OH) molar ratio of1:1, dispersing surfactant is sodium lauryl sulfate, the amount is polymer drag reduction of oil of0.1%, dispersing agent for water, oil drag reduction of polymer particle size is60～80mesh (250～180um), the microcapsules prepared surface shape is good. In the scale-up, oil drag reduction of polymer micro-capsules were prepared, the reactor mixing intensity directly affects the thickness of the microcapsule wall material, the thickness of the wall material of microcapsules are directly determines the release rate of core material.Therefore, industrial production, to be equipped with high-power high-speed motor to increase the intensity of agitation.When most companies have provided with the existing experimental equipment, there has not been affected the effect of micro-capsules because of the reactor mixing intensity.Oil drag reduction of polymer micro-capsules is produced in the scale-up with surface good, has a faster release rate, does not affect drag reduction effect, as well as excellent heat resistance and pressure resistance. Polymer drag reduction of oil exist solid body at room temperature, when used with the field,it may be dissolve into solvent and form of DRA, it solve the dispersion of industrial applications of technical problems.the scale-microcapsules through performance testing, microencapsulation technology does not exist engineering scale problems in chemical reaction engineering point of view of knowledge.but need to consider the industrial processes involved in washing, filtering and drying equipment. Under the present conditions in the enterprise investment and industrial production device debugging problems but there is no problem of industrial production.