PROCESS OF MANUFACTURE OF POROUS DIAPHRAGM FROM CHLORINE FABRIC Russian patent published in 2000 - IPC

FIELD: manufacture of diaphragms from synthetic fabrics used in mechanical engineering where corrosive solutions are employed. SUBSTANCE: process is related to electrochemical production of porous diaphragms used for regeneration of electrolytes, used etching solutions, for activation, passivation, clarification, etc. Proposed process of manufacture of porous diaphragm from chlorine fabric includes thermal treatment of fabric with simultaneous pressing. In this case chlorine fabric is folded and put under press heated to 80-90 C, then temperature is gradually raised to 100-110 C in the course of 5-10 min, later fabric is pressed at temperature equal to 100-110 C and pressure of 4•10⁵-12•10⁵ Pa in the course of 5-10 min. After this press is cooled to temperature of 80-90 C and finally manufactured porous diaphragm is removed. EFFECT: improved quality and service life of diaphragm by reduction of its hydraulic permeability, increase of chemical resistance with maintenance of its rigidity.