To separate a latex at a good efficiency into a permeated liquid and a retentate rich in solid matter at a high permeation flux without causing the agglomeration of the microparticles in the latex by feeding a latex to which a stabilizer has been added into either side of a membrane filter fitted with a permeable membrane and vibrating the permeable membrane.
A latex is fed from a latex feed tank 1 to one side of the filter pack 3 of a membrane filter, composed of many planar permeable membranes to permeate a permeable component into the other side. The permeated liquid is withdrawn from the filter and introduced into a storage tank 6. The retentate left after the permeation is introduced into a storage tank 5. The latex in the tank 1 has been stabilized with 0.001-10 pts.wt., per 100 pts.wt. solid matter, stabilizer, desirably, emulsifier. The efficiency of separation is improved by vibrating the permeable membranes within the filter pack 3 by means of torsion bar 4 which provides a small-amplitude reciprocating motion in the direction of the circumference of the horizontal plane.
TAKADA KAZUTAKA
TANIDA KATSUYOSHI
TAKEO YOSHIE
ENOMOTO TADASHI
SHIMADA MITSUSHIGE
