US3843824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of caffeine-free coffee extract
Assignee: Hag AG
•
Filing: 1972-04-19
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Granted: 1974-10-22
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Expires: 1992-04-19
Abstract
Abstract A method for the production of a caffein-free coffee product which comprises separating coffee oil by extraction of roasted coffee with a dry supercritical fluid, separating caffein from the roasted coffee by extraction with wet supercritical carbon dioxide, producing an extract from the decaffeinated roasted coffee and recovering the extracted coffee oil and adding at least a portion thereof to a coffee extract.
Inventors
- 👤 W Roselius
- 👤 O Vitzthum
- 👤 P Hubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:21
CPC Classifications
A; A23; A23F; A23F5/00; A23F5/20; A23F5/206; A23F5/46; A23F5/48; A23F5/483; B; B01; B01D; B01D11/00; B01D11/02; B01D11/0203
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
136 words
A METHOD FOR THE PRODUCTION OF SUBSTANTIALLY CAFFEINEFREE COFFEE EXTRACT PRODUCTS WHICH COMPRISES A. SEPARATING COFFEE OIL CONTAINING AROMA SUBSTANCES BY EXTRACTION OF ROUGH-GROUND ROAST COFFEE WITH A DRY SUPERCRITICAL FLUID HAVING SELECTIVE DISSOLVING CAPACITY FOR THE COFFEE OIL AND AROMA SUBSTANCES, AT A PRESSURE OF AT LEAST 80 ATMOSPHERES EXCESS AND A TEMPERATURE ABOVE 30*C., B. WETTING THE THUS EXTRACTED ROUGH-GROUND COFFEE WITH WATER AND EXTRACTING THE THUS WETTED PRODUCT WITH WET SUPERCRITICAL CARBON DIOXIDE TO REMOVE THE CAFFEINE IN THE ROUGH-GROUND COFFEE. C. EXTRACTING THE ROUGH-GROUND COFFEE REMAINING FROM THE PREVIOUS STEP WITH WATER TO PRODUCE AN AQUEOUS EXTRACT, D. DRYING SAID AQUEOUS EXTRACT TO OBTAIN A POWDER RESIDUE, E. RECOVERING THE COFFEE OIL CONTAINING AROMA SUBSTANCES FROM THE EXTRACTION OF STEP A) AND ADDING AT LEAST A PORTION THEREOF TO A COFFEE EXTRACT.
Claim 2
Independent Claim
136 words
A METHOD FOR THE PRODUCTION OF SUBSTANTIALLY CAFFEINEFREE COFFEE EXTRACT PRODUCTS WHICH COMPRISES A. SEPARATING COFFEE OIL CONTAINING AROMA SUBSTANCES BY EXTRACTION OF ROUGH-GROUND ROAST COFFEE WITH A DRY SUPERCRITICAL FLUID HAVING SELECTIVE DISSOLVING CAPACITY FOR THE COFFEE OIL AND AROMA SUBSTANCES, AT A PRESSURE OF AT LEAST 80 ATMOSPHERES EXCESS AND A TEMPERATURE ABOVE 30*C., B. WETTING THE THUS EXTRACTED ROUGH-GROUND COFFEE WITH WATER AND EXTRACTING THE THUS WETTED PRODUCT WITH WET SUPERCRITICAL CARBON DIOXIDE TO REMOVE THE CAFFEINE IN THE ROUGH-GROUND COFFEE. C. EXTRACTING THE ROUGH-GROUND COFFEE REMAINING FROM THE PREVIOUS STEP WITH WATER TO PRODUCE AN AQUEOUS EXTRACT, D. DRYING SAID AQUEOUS EXTRACT TO OBTAIN A POWDER RESIDUE, E. RECOVERING THE COFFEE OIL CONTAINING AROMA SUBSTANCES FROM THE EXTRACTION OF STEP A) AND ADDING AT LEAST A PORTION THEREOF TO A COFFEE EXTRACT.
Claim 3
Dependent Claim
54 words
A method as in claim 1 in which the coffee oil containing the aroma substances is extracted with dry carbon dioxide at a temperature of 40*C. to 50*C. and a pressure of 180 to 350 excess atmospheres and separated from the carbon dioxide by reducing the pressure thereof to 58 to 65 excess atmospheres.
Claim 4
Dependent Claim
34 words
A method as in claim 2 in which the extraction of the wet rough-ground coffee is carried out at a temperature of 40*C. to 50*C. and a pressure of 180 to 350 excess atmospheres.
Claim 5
Dependent Claim
26 words
A method as in claim 3 in which the carbon dioxide utilized from the wet extraction is liquefied at a temperature of from 20*C. to 25*C.
Claim 6
Dependent Claim
28 words
A method as in claim 3 in which the caffeine is recovered from the wet carbon dioxide by reducing The pressure thereof to 58 to 65 excess atmospheres.
Claim 7
Dependent Claim
20 words
A method as in claim 5 in which the temperature of the carbon dioxide is increased to 80*C. to 120*C.
Claim 8
Dependent Claim
25 words
A method as in claim 3 in which the caffeine is recovered from the wet carbon dioxide by increasing the temperature to 80*C. to 120*C.
Claim 9
Dependent Claim
48 words
A method as in claim 1 in which the extraction with the dry supercritical fluid, the extraction with wet supercritical carbon dioxide and the extraction with water are carried out in the same vessel which is charged successively with dry supercritical fluid, wet supercritical carbon dioxide, and water.
Claim 10
Dependent Claim
33 words
A method according to claim 1, wherein the supercritical fluid used for extraction of the coffee oil containing the aroma substances is at least one of CO2, SF6, CHF3, CHF2Cl, CF3Cl and C3F8.
Claim 11
Dependent Claim
18 words
A method according to claim 1, wherein the supercritical fluid used in step (a) is dry carbon dioxide.
Claim 12
Dependent Claim
22 words
A method according to claim 1, in which the coffee extract of step (e) is the coffee extract produced in step (d).
Claim 13
Independent Claim
123 words
A method for the production of substantially caffeinefree coffee extract products which comprises a. separating coffee oil containing aroma substances by extraction of roasted coffee with a dry supercritical fluid having selective dissolving capacity for the coffee oil and aroma substances, b. separating caffeine from the roasted coffee from which coffee oil and aroma substances have been removed by extraction of the roasted coffee with wet supercritical carbon dioxide, c. extracting the roasted coffee from which caffeine has been removed with water to produce an aqueous extract, d. drying said aqueous extract to obtain a powder residue, e. recovering the coffee oil containing the aroma substances from the extraction of step (a) and adding at least a portion thereof to a coffee extract.
Claim 14
Independent Claim
123 words
A method for the production of substantially caffeinefree coffee extract products which comprises a. separating coffee oil containing aroma substances by extraction of roasted coffee with a dry supercritical fluid having selective dissolving capacity for the coffee oil and aroma substances, b. separating caffeine from the roasted coffee from which coffee oil and aroma substances have been removed by extraction of the roasted coffee with wet supercritical carbon dioxide, c. extracting the roasted coffee from which caffeine has been removed with water to produce an aqueous extract, d. drying said aqueous extract to obtain a powder residue, e. recovering the coffee oil containing the aroma substances from the extraction of step (a) and adding at least a portion thereof to a coffee extract.
Claim 15
Dependent Claim
22 words
A method according to claim 12, in which the coffee extract of step (e) is the coffee extract produced in step (d).
Claim 16
Independent Claim
104 words
A method for the production of substantially caffeinefree coffee extract products which comprises a. separating coffee oil containing aroma substances by extraction of roasted coffee with a dry supercritical fluid having selective dissolving capacity for the coffee oil and aroma substances, b. separating caffeine from the roasted coffee from which coffee oil and aroma substances have been removed by extraction of the roasted coffee with wet supercritical carbon dioxide, c. producing a coffee extract from the decaffeinated coffee, d. recovering the coffee oil containing the aroma substances from the extraction of step (a) and adding at least a portion thereof to a coffee extract.
Claim 17
Independent Claim
104 words
A method for the production of substantially caffeinefree coffee extract products which comprises a. separating coffee oil containing aroma substances by extraction of roasted coffee with a dry supercritical fluid having selective dissolving capacity for the coffee oil and aroma substances, b. separating caffeine from the roasted coffee from which coffee oil and aroma substances have been removed by extraction of the roasted coffee with wet supercritical carbon dioxide, c. producing a coffee extract from the decaffeinated coffee, d. recovering the coffee oil containing the aroma substances from the extraction of step (a) and adding at least a portion thereof to a coffee extract.
Claim 18
Dependent Claim
33 words
A method according to claim 14, wherein the supercritical fluid used for extraction of the coffee oil containing the aroma substances is at least one of CO2, SF6, CHF3, CHF2Cl, CF3Cl and C3F8.
Claim 19
Dependent Claim
18 words
A method according to claim 14, wherein the supercritical fluid used in step (a) is dry carbon dioxide.
Claim 20
Dependent Claim
22 words
A method according to claim 14, in which the coffee extract of step (d) is the coffee extract produced in step (c).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |