IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0690393
(1991-04-25)
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우선권정보 |
NL-0001775 (1988-07-13); NL-0000285 (1989-02-06) |
발명자
/ 주소 |
- Hellemons Adrianus C. M. (Montfoort NLX)
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출원인 / 주소 |
- Douwe Egbets Koninklijke Tabaksfa-Briek-Koffiebranderijen-Theehandel N.V. (Urecht NLX 03)
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인용정보 |
피인용 횟수 :
15 인용 특허 :
0 |
초록
▼
A process for preparing an extract from ground, roasted coffee is described. A primary extract is prepared by exhaustive primary extraction with water or an aqueous solution in one or more extraction cells including one cell to which extraction liquid is supplied. A secondary extract is prepared by
A process for preparing an extract from ground, roasted coffee is described. A primary extract is prepared by exhaustive primary extraction with water or an aqueous solution in one or more extraction cells including one cell to which extraction liquid is supplied. A secondary extract is prepared by secondary extraction with water or an aqueous solution in one or more extraction cells including one cell from which secondary extract is drawn off. The process is conducted so that when the primary extraction cell to which the water or the aqueous solution is supplied has been exhaustively extracted, this cell is connected through to the secondary extraction as an extraction cell from which secondary extract is withdrawn, and the first quantity of extract from the cell connected through, which quantity corresponds approximately to the liquid contents of said cell, is supplied to the primary extraction as an extraction liquid.
대표청구항
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A process for preparing an extract from ground, roasted coffee beans, comprising: (a) providing a primary extraction cell bank having an inlet for extraction liquid and an outlet for primary extract, said primary extraction cell bank including at least one extraction cell, each extraction cell of sa
A process for preparing an extract from ground, roasted coffee beans, comprising: (a) providing a primary extraction cell bank having an inlet for extraction liquid and an outlet for primary extract, said primary extraction cell bank including at least one extraction cell, each extraction cell of said primary extraction cell bank being effectively connected between said inlet and said outlet so that extraction liquid introduced to said primary extraction cell bank will course through each extraction cell of said primary extraction cell bank before leaving said primary extraction cell bank as a primary extract through said outlet thereof; (b) providing a secondary extraction cell bank having an inlet for extraction liquid and an outlet for secondary extract, said secondary extraction cell bank including at least one extraction cell, each extraction cell of said secondary extraction cell bank being effectively connected between said inlet of said secondary extraction cell bank and said outlet of said secondary extraction cell bank so that extraction liquid introduced to said secondary extraction cell bank will course through each extraction cell of said secondary extraction cell bank before leaving said secondary extraction cell bank as a secondary extract through said outlet thereof; (c) charging each extraction cell in said primary extraction cell bank with ground, roasted coffee beans; (d) providing each extraction cell in said secondary extraction cell bank with a charge of ground, roasted coffee beans which have already been subjected to primary extraction in said primary extraction cell bank; (e) conducting a primary extraction of said ground, roasted coffee beans charged in said primary extraction cell bank, including introducing a stream of primary extraction liquid, devoid of said secondary extract, into said primary extraction cell bank through said inlet thereof and withdrawing a stream of primary extract from said primary extraction cell bank through said outlet thereof, said primary extraction being carried out at a temperature which is maximally equal to the boiling point of water at atmospheric pressure and in the absence of said secondary extract, in order to progressively remove from the ground, roasted coffee beans in said primary extraction cell bank only such components as are directly soluble in water; (f) conducting a secondary extraction of said ground, roasted coffee beans provided as a charge in said secondary extraction cell bank, including introducing a stream of secondary extraction liquid into said secondary extraction cell bank through said inlet thereof and withdrawing a stream of secondary extract from said secondary extraction cell bank through said outlet thereof, said secondary extraction being carried out at a temperature which is above that used in conducting said primary extraction and such that a portion of solids in said ground, roasted coffee beans that was insoluble under conditions prevailing during said primary extraction, is hydrolysed to form soluble components which are extracted in said secondary extraction; (g) periodically removing from said primary extraction cell bank an extraction cell effectively closest to said inlet of said primary extraction cell bank upon achievement of substantially complete exhaustion of the charge of ground, roasted coffee beans therein insofar as extractability of coffee solubles therefrom by said primary extraction is concerned, and adding this cell, still containing its charge of primary extracted ground, roasted coffee beans and its filling of extraction liquid, to said secondary extraction cell bank so as to be effectively closest to said outlet of said secondary extraction cell bank; (h) correspondingly periodically removing from said secondary extraction cell bank an extraction cell effectively closest to said inlet of said secondary extraction cell bank, emptying this cell of its charge of secondary extracted ground, roasted coffee beans, adding this cell to said primary extraction cell bank as an extraction cell effectively closest to said outlet of said primary extraction cell bank, and conducting step (c) in regard to this cell; (i) each time step (g) of conducted, withdrawing approximately so much of said filling of extraction liquid from the cell which has just been removed from the primary extraction cell bank and added to the secondary extraction cell bank as will drain therefrom, including at least 75 percent of said filling of extraction liquid contained in this cell when this cell was removed from the primary extraction cell bank but substantially no secondary extraction liquid introduced into this cell as a result of initiation of step (f) in regard thereto after this cell has been added to the secondary extraction cell bank, and adding the extraction liquid thereby withdrawn from this cell, to said stream of primary extraction liquid being introduced to said primary extraction cell bank in step (e), thereafter reverting to conducting steps (e) and (f), respectively, in regard to the primary extraction cell bank and secondary extraction cell bank; (j) concentrating said primary extract obtained from said primary extraction cell bank through said outlet thereof, to provide a concentrated primary extract; (k) concentrating said secondary extract obtained from said secondary extraction cell bank through said outlet thereof, minus said extract or liquid withdrawn from each respective said cell in step (i), and thereby removing both water vapor and at least some undesirable aroma constituents from said secondary extract, to provide a concentrated secondary extract; and (l) mixing said concentrated primary extract and said concentrated secondary extract to provide a concentrated coffee extract product.
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