公开(公告)号：DE10001794A1

公开(公告)日：2000-09-07

申请号：DE10001794

申请日：2000-01-18

Applicant: AGENCY IND SCIENCE TECHN

Inventor： OKI TATSUYA ,  YOTSUMOTO HIROKI

IPC: B03C5/00 ,  B03C5/02 ,  G01N15/02 ,  B01D43/00

Abstract: A rotator (4) is installed in the fine particle dispersion liquid and an electric charge opposite to electric charge of fine particles is applied to the rotator outer circumferential surface. The rotator is rotated and its outer circumferential surface is made absorb the fine particles in the dispersion liquid.

公开(公告)号：JPH09192408A

公开(公告)日：1997-07-29

申请号：JP897896

申请日：1996-01-23

Applicant: AGENCY IND SCIENCE TECHN

Inventor： YOTSUMOTO KOKI ,  OKI TATSUYA ,  ARAI SATOSHI ,  SAKAMOTO HIROSHI

IPC: B01D21/01 ,  B01F17/00

Abstract: PROBLEM TO BE SOLVED: To produce a novel flocculant not causing a problem such as waste water treatment difficulty and environmental pollution and to produce a solid grain having a hydrophilic group on its surface and capable of easily forming a highly stable oil-in-water emulsion only by adding water. SOLUTION: This hydrophilic solid grain consists of a hot-melt water-soluble solid grain and a surfactant having a hydrophilic group and a hydrophobic group, and the surfactant is bonded to the solid grain through the hydrophobic group. A molten water-insoluble material is granulated in water in the presence of a surfactant to form an oil-in-water emulsion, the emulsion is cooled to convert the molten grain of the water-insoluble material into the solid grain, and the solid grain is separated from water to produce the hydrophilic grain.

公开(公告)号：JP2000051733A

公开(公告)日：2000-02-22

申请号：JP22601398

申请日：1998-08-10

Applicant: AGENCY IND SCIENCE TECHN

Inventor： OKI TATSUYA ,  YOTSUMOTO KOKI

IPC: B03D1/02 ,  B03B7/00 ,  B03B13/00 ,  B03D1/08

Abstract: PROBLEM TO BE SOLVED: To improve the separation efficiency between hydrophilic particles and hydrophobic particles in the case of separating the hydrophilic particles and the hydrophobic particles, by dispersing bubbles in an aq. suspension liquid of a particle mixture to make a bubble layer where the hydrophobic particles are deposited formed in the water surface part and to make a hydrophilic particle layer where the hydrophilic particles are accumulated formed in the water surface part. SOLUTION: When a feed in which air bubbles are present in an aq. suspension liquid of a particle mixture consisting of hydrophilic particles and hydrophobic particles is supplied from a feed supply port 2 to a separation task 1, the hydrophobic particles adsorb to the bubbles present in the water and float on the water face, while the hydrophilic particles float by the buoyancy to the water surface part. Namely, in the separation tank 1, the hydrophobic particles deposit to the bubbles and float with the bubbles on the water face to form a bubble layer F on the water face. On the other hand, the hydrophilic particles accumulate in the water a little lower than the bubble layer F to form a hydrophilic particle layer W. Then, the bubble layer F is carried in the opposite direction to the water flow by a blower 5 or the like and discharged from a bubble discharging port 4, while the hydrophilic particle layer W is discharged with water from a water discharging port 3.

公开(公告)号：JP2000202325A

公开(公告)日：2000-07-25

申请号：JP1140699

申请日：1999-01-20

Applicant: AGENCY IND SCIENCE TECHN

Inventor： OKI TATSUYA ,  YOTSUMOTO KOKI

IPC: B03C5/00 ,  B03C5/02 ,  G01N15/02

Abstract: PROBLEM TO BE SOLVED: To separate/recover fine particles having a wide particle size distritution continuously, promptly, and simply in one process by installing a rotor having a self-rotation blade vertically in a standing cylinder type dispersion tank and charging the peripheral surface of the rotor oppositely to the charge of fine particles in dispersion. SOLUTION: In order to use a rotor 4, the charge of fine particles in a dispersion 1 is investigated, and the rotor 4 which generates ζ-potential of a charge opposite to it is selected. In order to separate the particles 2 in the dispersion 1, the dispersion 1 is passed downward in a standing cylinder type separation tank 3, and the rotor 4 installed in the tank 3 is rotated by a self-rotation blade 8 fitted to the lower part of the tank 3. In this way, the particles 2 adsorbed on the surface of the rotor 4 are separated from the surface to be recovered. The separation/recovery of the particles 2 having a wide particle size distribution can be done continuously, promptly, and simply in one process, and response to mass treatment is possible.