US3928165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic cell including means for separating chlorine from the chlorine-electrolyte froth formed in the cell
Assignee: PPG Industries Inc
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Filing: 1974-07-05
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Granted: 1975-12-23
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Expires: 1994-07-05
Abstract
Abstract An electrolytic cell adapted for the high current density electrolysis of brines is disclosed. The chlorine gas liberated at the anodes is caused to go to a chlorine disengaging tank where the gas is separated from the entrained anolyte, and the anolyte is returned to the cell. Additionally, by taking advantage of the gas uplift in one portion of the cell and the simultaneous return of anolyte to another portion of the cell, a rotary motion of the electrolyte is maintained in the cell. In this way a high concentration of chloride ion and a low concentration of gas are maintained in the anolyte under conditions of high current density electrolysis.
Inventors
- 👤 Loyd W Piester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:25
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B15/00; C25B15/08; C25B15/083; C25B9/00; C25B9/70
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
In an electrolytic cell for the electrolysis of brines at currents above 2,500 amperes per square foot of horizontal area whereby a froth of chlorine and electrolyte is generated, the improvement comprising: means having a cross-sectional area of less than 0.050 square feet per cubic foot of cell volume for removing froth from the cell to a disengaging tank; means for changing the momentum vector and flow direction of the froth prior to discharging the froth into the disengaging tank; means for thereafter discharging the froth into the disengaging tank above the level of liquid therein; and means for returning liquid from the disengaging tank to the electrolytic cell.
Claim 2
Dependent Claim
109 words
In an electrolytic cell for the electrolysis of brines at currents above 2,500 amperes per square foot of horizontal area whereby a froth of chlorine and electrolyte is generated, the improvement comprising: means having a cross-sectional area of less than 0.050 square feet per cubic foot of cell volume for removing froth from the cell to a disengaging tank; means for changing the momentum vector and flow direction of the froth prior to discharging the froth into the disengaging tank; means for thereafter discharging the froth into the disengaging tank above the level of liquid therein; and means for returning liquid from the disengaging tank to the electrolytic cell.
Claim 3
Dependent Claim
27 words
The electrolytic cell of claim 1 wherein said disengaging tank has a horizontal cross-sectional area in excess of 0.06 square feet per cubic foot of cell volume.
Claim 4
Dependent Claim
106 words
In an electrolytic cell for the electrolysis of brines at currents above 2,500 amperes per square foot of horizontal area whereby a froth of chlorine and electrolyte is generated, the improvement comprising: means having a cross-sectional area of less than 0.050 square feet per cubic foot of cell volume for removing froth from the cell to a disengaging tank; means for changing the direction of flow of the froth prior to discharging the froth into the disengaging tank; means for discharging the froth into the disengaging tank above the level of liquid therein; and means for returning liquid from the disengaging tank to the electrolytic cell.
Claim 5
Dependent Claim
106 words
In an electrolytic cell for the electrolysis of brines at currents above 2,500 amperes per square foot of horizontal area whereby a froth of chlorine and electrolyte is generated, the improvement comprising: means having a cross-sectional area of less than 0.050 square feet per cubic foot of cell volume for removing froth from the cell to a disengaging tank; means for changing the direction of flow of the froth prior to discharging the froth into the disengaging tank; means for discharging the froth into the disengaging tank above the level of liquid therein; and means for returning liquid from the disengaging tank to the electrolytic cell.
Claim 6
Dependent Claim
27 words
The electrolytic cell of claim 3 wherein said disengaging tank has a horizontal cross-sectional area in excess of 0.06 square feet per cubic foot of cell volume.
Claim 7
Dependent Claim
96 words
IN AN ELECTROLYTIC CELL FOR THE ELECTROLYSIS OF BRINES AT CURRENTS ABOVE 2,500 AMPERES PER SQUARE FOOT OF HORIZONTAL AREA WHEREBY A FROTH OF CHLORINE AND ELDCTROLYTE IS GENERATED, THE IMPROVEMENT COMPRISING: MEANS HAVING A CROSS-SECTIONAL AREA OF LESS THAN 0.050 SQUARE FEET PER CUBIC FOOT OF CELL VOLUME FOR REMOVING FROTH FROM THE CELL TO A DISENGAGING TANK HAVING A CROSSSECTIONAL AREA IN EXCESS OF 0.06 SQUARE FEET PER CUBIC FOOT OF CELL VOLUME; MEANS FOR CHANGING THE MONENTUM VECTOR AND FLOW DIRECTION OF THE FROTH PRIOR TO DISCHARGING THE FROTH INTO THE DISENGAGING TANK;
Claim 8
Dependent Claim
96 words
IN AN ELECTROLYTIC CELL FOR THE ELECTROLYSIS OF BRINES AT CURRENTS ABOVE 2,500 AMPERES PER SQUARE FOOT OF HORIZONTAL AREA WHEREBY A FROTH OF CHLORINE AND ELDCTROLYTE IS GENERATED, THE IMPROVEMENT COMPRISING: MEANS HAVING A CROSS-SECTIONAL AREA OF LESS THAN 0.050 SQUARE FEET PER CUBIC FOOT OF CELL VOLUME FOR REMOVING FROTH FROM THE CELL TO A DISENGAGING TANK HAVING A CROSSSECTIONAL AREA IN EXCESS OF 0.06 SQUARE FEET PER CUBIC FOOT OF CELL VOLUME; MEANS FOR CHANGING THE MONENTUM VECTOR AND FLOW DIRECTION OF THE FROTH PRIOR TO DISCHARGING THE FROTH INTO THE DISENGAGING TANK;
Claim 9
Dependent Claim
122 words
In an electrolytic cell for the electrolysis of brines at currents above 2,500 amperes per square foot of horizontal area whereby a froth of chlorine and electrolyte is generated, the improvement comprising: means having a cross-sectional area of less than 0.050 square feet per cubic foot of cell volume for removing froth from the cell to a disengaging tank having a cross-sectional area in excess of 0.06 square feet per cubic foot of cell volume; means for changing the direction of flow of the froth prior to discharging the froth into the disengaging tank; means for discharging the froth into the disengaging tank above the level of liquid therein; and means for returning liquid from the disengaging tank to the electrolytic cell.
Claim 10
Dependent Claim
122 words
In an electrolytic cell for the electrolysis of brines at currents above 2,500 amperes per square foot of horizontal area whereby a froth of chlorine and electrolyte is generated, the improvement comprising: means having a cross-sectional area of less than 0.050 square feet per cubic foot of cell volume for removing froth from the cell to a disengaging tank having a cross-sectional area in excess of 0.06 square feet per cubic foot of cell volume; means for changing the direction of flow of the froth prior to discharging the froth into the disengaging tank; means for discharging the froth into the disengaging tank above the level of liquid therein; and means for returning liquid from the disengaging tank to the electrolytic cell.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |