US4693879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic vibration sieving apparatus and process for purifying carbon black by using the apparatus
Assignee: Mitsubishi Chemical Corp
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Filing: 1985-10-09
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Granted: 1987-09-15
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Expires: 2005-10-09
Abstract
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.
Inventors
- 👤 Shushichi Yoshimura
- 👤 Yasunori Hiwatashi
- 👤 Hiromu Kobayashi
- 👤 Hozo Yamazaki
- 👤 Nobu Nishino
- 👤 Teruji Tahara
- 👤 Hidenobu Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:09
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; B; B01; B01D; B01D33/00; B01D33/06; B01D33/073; B01D33/44; B01D33/52; B01D33/54; B01D35/00; B01D35/20; B03; B03B; B03B7/00; B07; B07B; B07B1/00; B07B1/18; B07B1/22; B07B1/28; B07B2230/00; B07B2230/04; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/12; C01P2006/19; C01P2006/22
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
182 words
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.
Claim 2
Dependent Claim
182 words
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.
Claim 3
Dependent Claim
42 words
The process according to claim 1, wherein the carbon black aqueous slurry is obtained by suspending carbon black which contains solid impurities, uniformly in water to obtain a highly concentrated carbon black aqueous slurry and then further diluting the slurry with water.
Claim 4
Dependent Claim
33 words
The process according to claim 1, wherein the carbon black aqueous slurry to be subjected to sieving treatment by the ultrasonic vibration sieving apparatus, has a viscosity of from 0.1 to 50 poise.
Claim 5
Dependent Claim
33 words
The process according to claim 1, wherein the carbon black aqueous slurry to be subjected to sieving treatment by the ultrasonic vibration sieving apparatus, has a viscosity of from 0.1 to 20 poise.
Claim 6
Dependent Claim
23 words
The process according to claim 1, wherein the highly concentrated carbon black aqueous slurry has a viscosity of from 1 to 100 poise.
Claim 7
Dependent Claim
23 words
The process according to claim 1, wherein the highly concentrated carbon black aqueous slurry has a viscosity of from 25 to 100 poise.
Claim 8
Dependent Claim
49 words
The process according to claim 1, wherein the sieving machine body is provided with a liquid level controlling mechanism to control the liquid level in the gas chamber so that at least the lower end portion of the ultrasonic oscillation tip is dipped in the slurry to be sieved.
Claim 9
Dependent Claim
39 words
The process according to claim 1, wherein the gas chamber is provided with a gas supply pipe, and the discharge pipe for the sieved carbon black aqueous slurry is open at a predetermined liquid level in the gas chamber.
Claim 10
Dependent Claim
20 words
The process according to claim 1, wherein the lower end surface of the ultrasonic oscillation tip is rectangular in shape.
Claim 11
Dependent Claim
50 words
The process according to claim 7, wherein the filter layer is rotatably supported, and the ultrasonic oscillation tip is 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.
Claim 12
Dependent Claim
118 words
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.
Claim 13
Dependent Claim
118 words
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.
Claim 14
Dependent Claim
31 words
The ultrasonic vibration sieving apparatus according to claim 11, wherein the tip chamber is a gas chamber filled with a gas except for the lower portion of the ultrasonic oscillation tip.
Claim 15
Dependent Claim
52 words
The ultrasonic vibration sieving apparatus according to claim 12, wherein the sieving machine body is provided with a liquid level controlling mechanism to control the liquid level in the gas chamber so that at least the lower end portion of the ultrasonic oscillation tip is dipped in the slurry to be sieved.
Claim 16
Dependent Claim
41 words
The ultrasonic vibration sieving apparatus according to claim 12 wherein the gas chamber is provided with a gas supply pipe, and the discharge pipe for the material to be sieved is open at a predetermined liquid level in the gas chamber.
Claim 17
Dependent Claim
22 words
The ultrasonic sieving apparatus according to claim 11, wherein the lower end surface of the ultrasonic oscillation tip is rectangular in shape.
References Cited (Backward Citations)
US3490584A
Cited
JPH11963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |