Patent US3727786A successfully refreshed from Google Patents.
Patent US5164030A successfully refreshed from Google Patents.
US5164030A
Expired / Lapsed
US
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Continuous process for the separation of solutions and suspensions
Assignee: Bayer AG
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Filing: 1991-03-22
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Granted: 1992-11-17
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Expires: 2011-03-22
Abstract
Abstract In the thermal separation of solutions and suspensions into a free-flowing solid and into a largely solid-free distillate, the useful product can be almost completely recovered in a pure state, and the amount of waste product can thus be reduced, by carrying out the concentrating in a first heatable flow pipe (6) up to an upper limit which is given by a creeping coverage of the inside wall with solid and/or by a total blockage of the flow cross-section and then continuing the concentrating in a second flow pipe (9) which is made as a rotary pipe or as a paddle shaft apparatus and whose inside wall (12) is scraped continuously, and separating the vapors and solids from one another at the end of this flow pipe (9).
Inventors
- 👤 Clemens Casper
- 👤 Jorgen Weinschenck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:16
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/22; B01D1/24; B01D1/04; B01D1/222; B01D1/228; B01D1/26; Y; Y10; Y10S; Y10S159/00; Y10S159/13
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
194 words
A continuous process for thermal separation of solutions and suspensions into a free flowing solid and into a solid-free distillate comprising the steps of passing a solution and suspension into and through a first heated flow pipe for concentration only up to an upper limit which is given by creeping converge of the side wall of the first flow pipe with solid and/or by total blockage of the flow cross-section, flowing for further concentration the concentrate and vapor from an exit and of the first heated flow pipe at an angle into a second heated flow pipe having a cross-section area at least 50 times greater than the cross-sectional area of the first heated flow pipe, introducing the concentrate and vapor onto an inside wall of the second heated flow pipe, rotating the second heated flow pipe about a longitudinal axis, flowing the concentrate along the side wall toward an exit end of the second heated flow pipe, scraping the inside wall to prevent crusting of the concentrate on the wall, discharging a free-flowing solid from the exit end of the second heated flow pipe, and removing the vapors produced in the flow pipes.
Claim 2
Dependent Claim
194 words
A continuous process for thermal separation of solutions and suspensions into a free flowing solid and into a solid-free distillate comprising the steps of passing a solution and suspension into and through a first heated flow pipe for concentration only up to an upper limit which is given by creeping converge of the side wall of the first flow pipe with solid and/or by total blockage of the flow cross-section, flowing for further concentration the concentrate and vapor from an exit and of the first heated flow pipe at an angle into a second heated flow pipe having a cross-section area at least 50 times greater than the cross-sectional area of the first heated flow pipe, introducing the concentrate and vapor onto an inside wall of the second heated flow pipe, rotating the second heated flow pipe about a longitudinal axis, flowing the concentrate along the side wall toward an exit end of the second heated flow pipe, scraping the inside wall to prevent crusting of the concentrate on the wall, discharging a free-flowing solid from the exit end of the second heated flow pipe, and removing the vapors produced in the flow pipes.
Claim 3
Dependent Claim
42 words
A process as in claim 1 wherein the solution and suspension flows through the first heated flow pipe along a helical path, and wherein the concentrate and vapor exit that flow pipe at a velocity of at least 50 meters per second.
Claim 4
Dependent Claim
18 words
A process as in claim 2 wherein the helical flow path has a pitch of at least 20°.
Claim 5
Dependent Claim
56 words
A process as in claim 1 wherein scraping the inside wall of the second heated flow pipe is accomplished with a rotary blade scraper having a longitudinal axis parallel to the longitudinal axis of the second heated flow pipe, and rotating the blade scraper in a direction opposite the rotary direction of the second flow pipe.
Claim 6
Dependent Claim
24 words
A process as in claim 1 including the step of pre-evaporating the solution and suspension prior to introduction into the first heated flow pipe.
Claim 7
Dependent Claim
194 words
A continuous process for thermal separation of solutions and suspensions into a free flowing solid and into a solid-free distillate comprising the steps of passing a solution and suspension into and through a first heated flow pipe for concentration only up to an upper limit which is given by creeping coverage of the inside wall of the first flow pipe with solid and/or by total blockage of the flow cross-section, flowing for further concentration the concentrate and vapor from an exit end of the first heated flow pipe at an angle into a second heated flow pipe having a cross-section area at least 50 times greater than the cross-section area of the first heated flow pipe, introducing the concentrate and vapor onto an inside wall of the second heated flow pipe, wherein the second heated flow pipe includes a paddle screw, flowing the concentrate along the side wall toward an exit end of the second heated flow pipe, scraping the inside wall to prevent crusting of the concentrate on the wall, discharging a free-flowing solid from the exit end of the second heated flow pipe, and removing the vapors produced in the flow pipes.
Claim 8
Dependent Claim
194 words
A continuous process for thermal separation of solutions and suspensions into a free flowing solid and into a solid-free distillate comprising the steps of passing a solution and suspension into and through a first heated flow pipe for concentration only up to an upper limit which is given by creeping coverage of the inside wall of the first flow pipe with solid and/or by total blockage of the flow cross-section, flowing for further concentration the concentrate and vapor from an exit end of the first heated flow pipe at an angle into a second heated flow pipe having a cross-section area at least 50 times greater than the cross-section area of the first heated flow pipe, introducing the concentrate and vapor onto an inside wall of the second heated flow pipe, wherein the second heated flow pipe includes a paddle screw, flowing the concentrate along the side wall toward an exit end of the second heated flow pipe, scraping the inside wall to prevent crusting of the concentrate on the wall, discharging a free-flowing solid from the exit end of the second heated flow pipe, and removing the vapors produced in the flow pipes.
Claim 9
Dependent Claim
42 words
A process as in claim 6 wherein the solution and suspension flow through the first heated flow pipe along a helical path, and wherein the concentrate and vapor exit that flow pipe at a velocity of at least 50 meters per second.
Claim 10
Dependent Claim
18 words
A process as in claim 7 wherein the helical flow path has a pitch of at least 20°.
Claim 11
Dependent Claim
24 words
A process as in claim 6 including the step of pre-evaporating the solution and suspension prior to introduction into the first heated flow pipe.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-17 | 1996-05-18 | 1996-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-17 | 2000-05-18 | 2000-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-17 | 2004-05-18 | 2004-11-17 | $7700.00 | Window Closed / Lapsed |