CA2033760A1 - Process for the quasi-continuous decaffeination of raw coffee - Google Patents

Process for the quasi-continuous decaffeination of raw coffee

Info

Publication number
CA2033760A1
CA2033760A1 CA2033760A CA2033760A CA2033760A1 CA 2033760 A1 CA2033760 A1 CA 2033760A1 CA 2033760 A CA2033760 A CA 2033760A CA 2033760 A CA2033760 A CA 2033760A CA 2033760 A1 CA2033760 A1 CA 2033760A1
Authority
CA
Canada
Prior art keywords
bar
green coffee
caffeine
decaffeination
carbon dioxide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2033760A
Other languages
French (fr)
Other versions
CA2033760C (en
Inventor
Hedi Ben-Nasr
Hubert Coenen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kohlensaure-Werke Rud Buse & Co GmbH
Original Assignee
Kohlensaure-Werke Rud Buse & Co GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kohlensaure-Werke Rud Buse & Co GmbH filed Critical Kohlensaure-Werke Rud Buse & Co GmbH
Publication of CA2033760A1 publication Critical patent/CA2033760A1/en
Application granted granted Critical
Publication of CA2033760C publication Critical patent/CA2033760C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D473/00—Heterocyclic compounds containing purine ring systems
    • C07D473/02—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6
    • C07D473/04—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6 two oxygen atoms
    • C07D473/06—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6 two oxygen atoms with radicals containing only hydrogen and carbon atoms, attached in position 1 or 3
    • C07D473/12—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6 two oxygen atoms with radicals containing only hydrogen and carbon atoms, attached in position 1 or 3 with methyl radicals in positions 1, 3, and 7, e.g. caffeine
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
    • A23F5/00—Coffee; Coffee substitutes; Preparations thereof
    • A23F5/20—Reducing or removing alkaloid content; Preparations produced thereby; Extracts or infusions thereof
    • A23F5/208—Reducing or removing alkaloid content; Preparations produced thereby; Extracts or infusions thereof by extraction of the beans with water, aqueous solutions without organic or inorganic solvents, or aqueous coffee extract
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
    • A23F5/00—Coffee; Coffee substitutes; Preparations thereof
    • A23F5/20—Reducing or removing alkaloid content; Preparations produced thereby; Extracts or infusions thereof
    • A23F5/22—Reducing or removing alkaloid content from coffee extract
    • A23F5/226—Reducing or removing alkaloid content from coffee extract by extraction with selective solvents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D11/00—Solvent extraction
    • B01D11/02—Solvent extraction of solids
    • B01D11/0203—Solvent extraction of solids with a supercritical fluid
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Tea And Coffee (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

A simple, operationally reliable and economic process is described for decaffeinating green coffee, which ensures a high degree of decaffeination, avoids denaturation of further constituents of the green coffee and permits isolation of the caffeine. In this process, green coffee beans, optionally moistened to 20% by weight to 40% by weight, are first extracted with a carbon dioxide-saturated liquid solvent, preferably water, at a temperature of 20 DEG C to 110 DEG C and at a pressure of 30 bar to 300 bar and, after reducing the pressure to 1 bar to 10 bar, are rinsed with the liquid solvent. The liquid phase loaded with the green coffee constituents including caffeine is decaffeinated in a device provided downstream by treatment with supercritical carbon dioxide and is again saturated with CO2. The caffeine is washed out of the supercritical CO2 phase with water and is isolated in pure crystalline form. <IMAGE>
CA002033760A 1990-01-10 1991-01-08 Process for the quasi-continuous decaffeination of raw coffee Expired - Fee Related CA2033760C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4000474A DE4000474A1 (en) 1990-01-10 1990-01-10 METHOD FOR QUASICONTINUALLY DECOFFINATING RAW COFFEE
DEP4000474.0 1990-01-10

Publications (2)

Publication Number Publication Date
CA2033760A1 true CA2033760A1 (en) 1991-07-11
CA2033760C CA2033760C (en) 1997-07-01

Family

ID=6397794

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002033760A Expired - Fee Related CA2033760C (en) 1990-01-10 1991-01-08 Process for the quasi-continuous decaffeination of raw coffee

Country Status (5)

Country Link
EP (1) EP0439710B1 (en)
JP (1) JP2515436B2 (en)
AT (1) ATE106674T1 (en)
CA (1) CA2033760C (en)
DE (1) DE4000474A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4316654A1 (en) * 1993-05-12 1995-01-12 Inst Technologie Und Umweltsch Process for the depletion of caffeine and chlorogenic acids from green coffee
DE4400096C2 (en) * 1994-01-04 1997-06-12 Barth Raiser Hopfenextraktion Process for decaffeinating black tea
DE10225079B4 (en) * 2002-06-05 2005-12-15 Büttner, Andreas, Dr. Process for extracting ingredients from an extraction material and apparatus therefor
DE502005010720D1 (en) * 2004-07-09 2011-02-03 Nateco2 Gmbh & Co Kg METHOD FOR DE CCOUNTING TEA
CN103313613B (en) 2010-10-13 2016-04-06 洲际大品牌有限责任公司 As the coffee-extract of the composition of food, medicine, cosmetics, dietary supplements and biological products
WO2024094548A1 (en) * 2022-11-03 2024-05-10 Société des Produits Nestlé S.A. Roasted coffee

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR12612E (en) * 1909-11-11 1910-10-20 Louis Klein Process for obtaining caffeine-free coffee beans
CH239206A (en) * 1945-04-12 1945-09-30 Forster Otto Process and device for the production of decaffeinated coffee.
DE2450978A1 (en) * 1974-10-26 1976-04-29 Helmut Dallinga Caffeine extraction from coffee by solvent treatment - esp. coffee beans without alteration of taste or aroma
DE2638383A1 (en) * 1975-08-27 1977-03-03 D E J Int Research Caffeine removal from coffee - by extraction with water, stripping with liq. or supercritical and renewed extraction
DE2727191B2 (en) * 1977-06-16 1980-07-03 Hag Ag, 2800 Bremen Process for the selective extraction of caffeine from plant materials
US4348422A (en) * 1978-02-13 1982-09-07 Studiengesellschaft Kohle M.B.H. Process for the direct decaffeination of aqueous coffee extract solutions
DE2846976C3 (en) * 1978-10-28 1982-05-06 Fried. Krupp Gmbh, 4300 Essen Process for decaffeinating green coffee
EP0010636A1 (en) * 1978-11-06 1980-05-14 Societe Des Produits Nestle S.A. Caffeine extraction
DE3318317C2 (en) * 1983-05-19 1987-01-29 Technica Entwicklungsgesellschaft mbH & Co KG, 2418 Ratzeburg Method and device for breaking down and extracting substances containing essential components from natural products
DE3445502A1 (en) * 1983-12-13 1985-06-20 Cafe Toro Ltda., Bogota Process and device for decaffeinating green coffee
DE3443390A1 (en) * 1984-11-28 1986-05-28 Hopfenextraktion HVG Barth, Raiser & Co, 8069 Wolnzach Process for separating off caffeine from liquefied or supercritical gases
ATA142986A (en) * 1986-05-27 1993-05-15 Schoeller Bleckmann Stahlwerke METHOD FOR TREATING COFFEE
DE3713953A1 (en) * 1986-06-20 1987-12-23 Krupp Gmbh METHOD FOR DECOFFINATING RAW COFFEE
DE3736322A1 (en) * 1987-10-27 1989-05-11 Jacobs Suchard Gmbh METHOD FOR CAREFULLY DECAFFINATING RAW COFFEE

Also Published As

Publication number Publication date
JP2515436B2 (en) 1996-07-10
CA2033760C (en) 1997-07-01
JPH05219889A (en) 1993-08-31
EP0439710A3 (en) 1992-01-08
EP0439710A2 (en) 1991-08-07
ATE106674T1 (en) 1994-06-15
EP0439710B1 (en) 1994-06-08
DE4000474A1 (en) 1990-11-15

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed