US3716141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent separating apparatus
Assignee: Veolia WTS Solutions USA Inc
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Filing: 1971-02-01
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Granted: 1973-02-13
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Expires: 1991-02-01
Abstract
Abstract A solvent separating apparatus for purifying a solution by exposing said solution, under pressure, to a solvent separating means including a non-positive displacement pump for elevating the pressure of said solution prior to direction into said solvent separating means and means including two presized orifices for maintaining the desired pressure and desired flow rate of said solution through said solvent separating means and for flushing said solvent separating means periodically without the necessity of further adjustments in order to return the system to normal operating conditions.
Inventors
- 👤 D Spatz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:29
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/14; B01D61/18; B01D61/02; B01D61/08; B01D63/00; B01D63/10; B01D2313/00; B01D2313/24; B01D2313/243
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
280 words
An ultrafiltration apparatus for separating the solvent from a feed solution by exposing said feed solution, under pressure, to a solvent separating means comprising: a non-positive displacement pump for elevating the pressure of a feed solution; means for supplying said feed solution to said non-positive displacement pump; a solvent separating means for separating said feed solution into a solvent and a more concentrated solution; means for conducting the pressurized feed solution from said pump to said solvent separating means; means for removing said solvent from said solvent separating means; means for insuring a desired pressure in and a desired flow rate through said solvent separating means in relationship to the characteristics of said pump including a presized recirculation orifice for directing a portion of said more concentrated solution from said solvent separating means into said pump for recirculation through the apparatus and a presized concentrate orifice for directing a portion of said more concentrated solution from said solvent separating means out of the apparatus, said presized recirculation orifice and said presized concentrate orifice having sizes which restrict the flow of said more concentrated solution from said solvent separating means to the extent that the desired pressure of said feed solution in said solvent separating means and the desired flow rate through said solvent separating means are maintained, and said presized recirculation and concentrate orifices having sizes with respect to each other such that the recovery of said solvent as a percentage of said feed solution is that which is desired; and means for periodically flushing the apparatus by causing said feed solution to flow through said solvent separating means at a flow rate substantially greater than said desired flow rate.
Claim 2
Dependent Claim
280 words
An ultrafiltration apparatus for separating the solvent from a feed solution by exposing said feed solution, under pressure, to a solvent separating means comprising: a non-positive displacement pump for elevating the pressure of a feed solution; means for supplying said feed solution to said non-positive displacement pump; a solvent separating means for separating said feed solution into a solvent and a more concentrated solution; means for conducting the pressurized feed solution from said pump to said solvent separating means; means for removing said solvent from said solvent separating means; means for insuring a desired pressure in and a desired flow rate through said solvent separating means in relationship to the characteristics of said pump including a presized recirculation orifice for directing a portion of said more concentrated solution from said solvent separating means into said pump for recirculation through the apparatus and a presized concentrate orifice for directing a portion of said more concentrated solution from said solvent separating means out of the apparatus, said presized recirculation orifice and said presized concentrate orifice having sizes which restrict the flow of said more concentrated solution from said solvent separating means to the extent that the desired pressure of said feed solution in said solvent separating means and the desired flow rate through said solvent separating means are maintained, and said presized recirculation and concentrate orifices having sizes with respect to each other such that the recovery of said solvent as a percentage of said feed solution is that which is desired; and means for periodically flushing the apparatus by causing said feed solution to flow through said solvent separating means at a flow rate substantially greater than said desired flow rate.
Claim 3
Dependent Claim
280 words
An ultrafiltration apparatus for separating the solvent from a feed solution by exposing said feed solution, under pressure, to a solvent separating means comprising: a non-positive displacement pump for elevating the pressure of a feed solution; means for supplying said feed solution to said non-positive displacement pump; a solvent separating means for separating said feed solution into a solvent and a more concentrated solution; means for conducting the pressurized feed solution from said pump to said solvent separating means; means for removing said solvent from said solvent separating means; means for insuring a desired pressure in and a desired flow rate through said solvent separating means in relationship to the characteristics of said pump including a presized recirculation orifice for directing a portion of said more concentrated solution from said solvent separating means into said pump for recirculation through the apparatus and a presized concentrate orifice for directing a portion of said more concentrated solution from said solvent separating means out of the apparatus, said presized recirculation orifice and said presized concentrate orifice having sizes which restrict the flow of said more concentrated solution from said solvent separating means to the extent that the desired pressure of said feed solution in said solvent separating means and the desired flow rate through said solvent separating means are maintained, and said presized recirculation and concentrate orifices having sizes with respect to each other such that the recovery of said solvent as a percentage of said feed solution is that which is desired; and means for periodically flushing the apparatus by causing said feed solution to flow through said solvent separating means at a flow rate substantially greater than said desired flow rate.
Claim 4
Dependent Claim
280 words
An ultrafiltration apparatus for separating the solvent from a feed solution by exposing said feed solution, under pressure, to a solvent separating means comprising: a non-positive displacement pump for elevating the pressure of a feed solution; means for supplying said feed solution to said non-positive displacement pump; a solvent separating means for separating said feed solution into a solvent and a more concentrated solution; means for conducting the pressurized feed solution from said pump to said solvent separating means; means for removing said solvent from said solvent separating means; means for insuring a desired pressure in and a desired flow rate through said solvent separating means in relationship to the characteristics of said pump including a presized recirculation orifice for directing a portion of said more concentrated solution from said solvent separating means into said pump for recirculation through the apparatus and a presized concentrate orifice for directing a portion of said more concentrated solution from said solvent separating means out of the apparatus, said presized recirculation orifice and said presized concentrate orifice having sizes which restrict the flow of said more concentrated solution from said solvent separating means to the extent that the desired pressure of said feed solution in said solvent separating means and the desired flow rate through said solvent separating means are maintained, and said presized recirculation and concentrate orifices having sizes with respect to each other such that the recovery of said solvent as a percentage of said feed solution is that which is desired; and means for periodically flushing the apparatus by causing said feed solution to flow through said solvent separating means at a flow rate substantially greater than said desired flow rate.
Claim 5
Dependent Claim
16 words
The solvent separating apparatus of claim 1 wherein said non-positive displacement pump is a centrifugal pump.
Claim 6
Dependent Claim
16 words
The solvent separating apparatus oF claim 2 wherein said centrifugal pump is a multistage centrifugal pump.
Claim 7
Dependent Claim
22 words
The solvent separating apparatus of claim 1 wherein said solvent separating means includes a reverse osmosis membrane of a spirally wound design.
Claim 8
Dependent Claim
20 words
The solvent separating apparatus of claim 1 and a pressure gauge for indicating the pressure of said more concentrated solution.
Claim 9
Dependent Claim
23 words
The solvent separating apparatus of claim 1 wherein said presized concentrate orifice is integrally formed within said means for periodically flushing the apparatus.
Claim 10
Dependent Claim
111 words
The solvent separating apparatus of claim 6 wherein said means for periodically flushing the apparatus includes a valve seat, an axially movable valve stem having a corresponding portion designed to be selectively moved into and out of contact with said valve seat so that when said corresponding portion of the valve stem is in contact with said valve seat said more concentrated solution is prevented from passing between said corresponding portion and said valve seat and when said corresponding portion of the valve stem is not in contact with said valve seat said more concentrated solution can freely flow between said corresponding portion and said valve seat to flush the apparatus.
Claim 11
Dependent Claim
49 words
The solvent separating apparatus of claim 7 in which said presized concentrate orifice is an opening in said valve stem which allows a limited amount of said more concentrated solution to exit from the apparatus when said corresponding portion and said valve seat are in contact with each other.
Claim 12
Dependent Claim
37 words
The solvent separating apparatus of claim 8 wherein one end of said valve stem includes a knob which can be manually rotated to selectively move said corresponding portion into and out of contact with said valve seat.
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |