US4186047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent removal from polymer solutions
Assignee: Phillips Petroleum Co
•
Filing: 1978-05-15
•
Granted: 1980-01-29
•
Expires: 1998-05-15
Abstract
Abstract By cooling the barrel of a devolatilizing extruder rather than by heating it, both the solvent removal rate and the polymer feed rate could be increased furthermore, the power surging of the motor driving the extruder was largely reduced or even eliminated by the process of this invention.
Inventors
- 👤 Emigdio J. Salmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:14
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/06; C08F6/12; B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/42; B29B7/426; B29B7/428; B29B7/429; B29B7/58; B29B7/72; B29B7/74; B29B7/7476; B29B7/7495; B29B7/80; B29B7/82; B29B7/823; B29B7/826; B29B7/84; B29B7/845; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/76; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92047; B29C2948/92323; B29C2948/92457; B29C2948/92504; B29C2948/92704; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C2948/92895; B29C2948/92971; B29C48/03
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
213 words
An apparatus for mechanically working a liquid mixture of a normally solid polymer and a solid comprising: (a) an extruder having a barrel and a screw with a screw configuration coaxially and rotatably arranged within said barrel, (b) a motor connected to said screw for rotating said screw within said barrel, (c) at least one jacket surrounding said barrel at a location where during the process mechanical work is put into said liquid mixture, (d) a source of cooling fluid connected to said jacket for circulating said cooling fluid through said jacket and to cool said barrel and to remove heat from said liquid mixture being in said location of mechanical working during the process, (e) a sensing means which senses the power surging of the motor driving said screw and generates a surge signal representative of the average power surging of said motor, and (f) control means controlling at least one of the flow rate and the temperature of said cooling fluid responsive to said surge signal such as to increase the heat withdrawal from the fluid in the extruder when the power surging is higher than a given setpoint and to decrease the heat withdrawal from the fluid in the extruder when the power surging is lower than a given setpoint.
Claim 2
Independent Claim
213 words
An apparatus for mechanically working a liquid mixture of a normally solid polymer and a solid comprising: (a) an extruder having a barrel and a screw with a screw configuration coaxially and rotatably arranged within said barrel, (b) a motor connected to said screw for rotating said screw within said barrel, (c) at least one jacket surrounding said barrel at a location where during the process mechanical work is put into said liquid mixture, (d) a source of cooling fluid connected to said jacket for circulating said cooling fluid through said jacket and to cool said barrel and to remove heat from said liquid mixture being in said location of mechanical working during the process, (e) a sensing means which senses the power surging of the motor driving said screw and generates a surge signal representative of the average power surging of said motor, and (f) control means controlling at least one of the flow rate and the temperature of said cooling fluid responsive to said surge signal such as to increase the heat withdrawal from the fluid in the extruder when the power surging is higher than a given setpoint and to decrease the heat withdrawal from the fluid in the extruder when the power surging is lower than a given setpoint.
Claim 3
Dependent Claim
19 words
An apparatus in accordance with claim 1 wherein said coolant source is a pump circulating water through said jacekt.
Claim 4
Dependent Claim
225 words
An apparatus of claim 1 for devolatilizing a liquid mixture of a normally solid polymer and a solvent comprising: (a) a devolatilizing extruder having a barrel and a screw with a screw configuration coaxially and rotatably arranged within said barrel, (b) a motor connected to said screw for rotating said screw within said barrel, (c) at least one jacket surrounding said barrel at a location where during the process mechanical work is put into said liquid mixture to volatilize at least a portion of said solvent, (d) a source of cooling fluid connected to said jacket for circulating said cooling fluid through said jacket and to cool said barrel and to remove heat from said liquid mixture being in said location of mechanical working during the process, (e) a sensing means which senses the power surging of the motor driving said screw and generates a surge signal representative of the average power surging of said motor, and (f) control means controlling at least one of the flow rate and the temperature of said cooling fluid responsive to said surge signal such as to increase the heat withdrawal from the fluid in the extruder when the power surging is higher than a given setpoint and to decrease the heat withdrawal from the fluid in the extruder when the power surging is lower than a given setpoint.
Claim 5
Dependent Claim
19 words
An apparatus in accordance with claim 4 wherein said coolant source is a pump circulating water through said jacket.
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) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |