Rapid soln. of water soluble polymers - by turbulent mixing of jets of water and water-in-oil emulsion in continuous process

摘要

Method comprises dilution of H2O-in-oil emulsion of the polymer with H2O so as to cause inversion and soln of the polymer H2O-in-oil emulsion and H2O in a wt. ratio of 1:8 to 1:100 are continuously introduced into a mixing zone so that the flow speed of the H2O lies within the range giving turbulence. The mixt. is then led out of the mixing zone through one or more apertures again at a speed which causes turbulence. The mixt. is allowed to remain in the next zone for a time and is finally diluted with more H2O in known manner. The process is effected continuously and is not affected by the presence of salts which in previous processes caused deposition of material. In an example, H2O at 1 litre/min and 70:30 acrylamide-diethylaminoethylacrylate copolymer in 22 wt. % H2O-in-oil emulsion at 25 ml/min. were pumped through narrow jets into a 10 cm3 mixing zone followed by a waiting zone and a 5 litre mixer. A stable soln of viscosity 620 mPa.s was obtd.