Ultrasonic vibration sieving apparatus and process for purifying carbon black by using the apparatus
AssigneeMitsubishi Chemical Industries Limited
InventorsShushichi Yoshimura, Yasunori Hiwatashi, Hiromu Kobayashi, Hozo Yamazaki, Nobu Nishino, Teruji Tahara, Hidenobu Kobayashi
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Abstract
A process for purifying carbon black which contains solid impurities by removing the solid impurities thererom, which process comprises suspending said carbon black uniformly in water to obtain a carbon black aqueous slurry and subjecting the slurry to sieving treatment by an ultrasonic vibration sieving apparatus.
Claims15
A process for purifying carbon black which contains solid impurities by removing the solid impurities therefrom, which process comprises suspending said carbon black uniformly in water to obtain a carbon black aqueous slurry and subjecting the slurry to a sieving treatment with an ultrasonic vibration sieving apparatus, and wherein said ultrasonic vibration sieving apparatus comprises:
- (a) a sieving maching body provided with a supply pipe and a discharge pipe for the carbon black aqueous slurry,
- (b) a sieving chamber provided within the sieving machine body and provided with a withdrawal pipe for a sieved carbon black aqueous slurry,
- (c) a filter layer constituting a part of the surface of the sieving chamber,
- (d) an ultrasonic oscillation tip facing the filter layer surface and being dipped in the carbon black aqueous slurry to be sieved, and
- (e) a tip chamber provided above the sieving machine body to permit the ultrasonic oscillation tip to enter into the sieving machine body;
- and wherein the the tip chamber is a gas chamber filled with a gas except for the lower portion of the ultrasonic oscillation tip.
An ultrasonic vibration sieving apparatus comprising a sieving machine body provided with a supply pipe and a discharge pipe for a material to be sieved, a sieving chamber provided within the sieving machine body and provided with a withdrawal pipe for a sieved material, a filter layer constituting a part of the surface of the sieving chamber and rotatably supported, an ultrasonic oscillation tip adapted to face only a part of the surface of the filter layer at one time and to face the entire surface of the filter layer as the filter layer rotates, and a tip chamber provided above the sieving machine body to permit the ultrasonic oscillation tip to enter into the sieving machine body.
Dependencies are inferred from the claim text.