Separation of resin from fluorocarbon resin solution

Abstract

Abstract PURPOSE:To obtain a solid fluorocarbon resin of a low residual solvent content in good efficiency, by dispersing an organic solvent solution of a fluorocarbon resin in a specified solvent in the form of fine particles to thereby deposit the fine particulate fluorocarbon resin. CONSTITUTION:A solution is obtained by dissolving a fluorocarbon resin of an intrinsic viscosity of 0.1-2.0dl/g (in tetrahydrofuran at 30 deg.C) and a glass transition temperature >=30 deg.C (e.g., polytetrafluoroethylene) in an organic solvent (e.g., tert-butanol). A solvent (e.g., water) which does not dissolve the fluorocarbon resin but dissolves the solvent for the fluorocarbon resin is circulated at a high speed by a pump 3 from a Venturi part 1 to a resin recovery rank 2. Said fluorocarbon resin solution is fed from a line 4 to the Venturi part 1 and is finely dispersed by a vortex of the solvent passing the Venturi part 1 to thereby deposit fine particulate fluorocarbon resin 5, and subjected to solid/liquid separation in the resin recovery tank 2 to recover the fluorocarbon resin.

Inventors

• 👤 Hiroshi Kimura
• 👤 博 木村
• 👤 Kazunori Chiba
• 👤 和典 千葉

Bibliographic Details