Omya Sa

Claude Cabannes

Bernard Barroyer

Henri Barnier

Process of continuously separating electrically charged, solid pulverulent materials in the form of a suspension in an electrophoresis and electroosmosis cell, characterized in that a fraction of the catholyte is drained off, that a portion thereof is treated with an acid, preferably gaseous, agent, that the treated portion is re-introduced into the cathode compartment, whereas the other part of the drained-off fraction is eliminated. The acid treatment is effected during continous pH measurements on the drained-off fraction of the catholyte.

Continuous process of separating electrically charged solid, pulverulent

A device for withdrawal of a fixed volume of powdered, liquid or gaseous material from a withdrawal zone and for conditioning the withdrawn materials for the purpose of analysis which comprises a retractable cylindrical probe in which there is provided a cavity of known capacity, a retractable sleeve coaxially disposed over the probe for permitting or preventing access to the cavity, a substantially closed chamber in which the probe and sleeve are disposed for reciprocal movement into and out of the withdrawal zone, whereby the probe and sleeve may be extended from the chamber into the withdrawal zone, the sleeve may be retracted to fill the cavity, the sleeve may be extended to seal the cavity, the probe and sleeve may be retracted from the withdrawal zone back into the closed chamber, and finally, the sleeve may again be retracted to permit conditioning of the withdrawn material.

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Eygalieres, France

Claude Cabannes