Patent US4687547A successfully refreshed from Google Patents.
US4687547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the separation of materials obtained by means of high pressure extraction
Assignee: Evonik Operations GmbH
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Filing: 1985-03-22
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Granted: 1987-08-18
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Expires: 2005-03-22
Abstract
Abstract The present invention provides a process for the separation of materials obtained by means of high pressure extraction from an extraction agent, wherein extraction agent loaded with extracted material is passed from below into a separator comprising a head (2), a bottom (3), a runback pipe (4) and a heat exchanger (1) in the form of one or more pipes and extract recycled in a forced circulation via the head (2) and the runback pipe (4) to the bottom (3) and there either discharged and/or returned to the heat exchanger (1), the extraction agent evaporated in the heat exchanger being removed via a filter (11) on the head (2).
Inventors
- 👤 Herbert Jekat
- 👤 Erwin Schutz
- 👤 Kurt Stork
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:46
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/02; B01D11/0203; Y; Y10; Y10S; Y10S159/00; Y10S159/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
117 words
Process for the separation of a material from a high-pressure extraction agent comprising: passing a high-pressure extraction agent in which is dissolved material to be separated therefrom, into a bottom of a separator and from the bottom into a heat exchanger comprising a pipe connected to a head of said separator for receiving said material to be separated and said extraction agent, from said heat exchanger; evaporating the extraction agent in the heat exchanger and removing it via a filter in the head; and recycling said material from the heat exchanger in a forced circulation from the head to the bottom in a runback pipe therebetween for discharge from the bottom or return to the heat exchanger.
Claim 2
Dependent Claim
117 words
Process for the separation of a material from a high-pressure extraction agent comprising: passing a high-pressure extraction agent in which is dissolved material to be separated therefrom, into a bottom of a separator and from the bottom into a heat exchanger comprising a pipe connected to a head of said separator for receiving said material to be separated and said extraction agent, from said heat exchanger; evaporating the extraction agent in the heat exchanger and removing it via a filter in the head; and recycling said material from the heat exchanger in a forced circulation from the head to the bottom in a runback pipe therebetween for discharge from the bottom or return to the heat exchanger.
Claim 3
Dependent Claim
12 words
Process according to claim 1, wherein the process is carried out continuously.
Claim 4
Dependent Claim
35 words
Process according to claim 1, wherein recycling the material in the runback pipe comprises filling the runback pipe with the material and further comprising measuring the filling of the runback pipe for controlling the same.
Claim 5
Dependent Claim
34 words
Process according to claim 1, wherein passing the extraction agent with the material from the bottom into the heat exchanger comprises spraying the same therefrom into the heat exchanger through at least one nozzle.
Claim 6
Dependent Claim
24 words
Process according to claim 1, wherein the material is solid, and further comprising heating the same to its liquefaction point in the heat exchanger.
References Cited (Backward Citations)
US2889874A
Cited
US3969196A
Cited
US3352693A
Cited
FR1381770A
Cited
US3622466A
Cited
US3860492A
Cited
DE2352758A1
Cited
US4218491A
Cited
US4217176A
Cited
US4273670A
Cited
US4394221A
Cited
GB2145343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |