Recovery Process for Polyfluoralkyl Methacrylate Resins
Original Publication Date: 1980-Aug-01
Included in the Prior Art Database: 2005-Feb-13
Fluorinated resins such as decafluorohexylmethacrylate resin dissolved in FREON* 113 contaminated with various impurities, including plasticizers, pigments, EPON**, fluorides, chlorides and water, can be cleaned in the illustrated apparatus. The resin is placed in can 10 and forced out under pressure of about 30 psi through 200 mesh fullers earth 12, preactivated overnight at 300 degrees F. The fuller's earth is in the form of a slurry with dielectric fluid to be purified as the vehicle. A cotton plug 14 is used to retain the fuller's earth in the cylinder 16 and a stopcock to prevent the fuller's earth from drying. A 300-gram anhydrous barium oxide column 6, containing 5 grams of indicated anhydrous calcium sulfate, is placed in line with the fuller's earth column 16 to receiving can 18. * Trademark of E. I.