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Method for extraction of oily components from coffee beans and/or of residual materials of coffee production

A technology of coffee beans and residues, applied in the direction of fat oil/fat production, coffee, coffee spices, etc.

Inactive Publication Date: 2017-08-01
GCR GLOBAL COMMODITY RESOURCES UG HAFTUNGSBESCHRANKT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that only dry material is extracted and the disclosed extraction solutions all contain excess alcohol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1 Wet extraction of industrial coffee grounds

[0062] For the extraction by means of a binary extraction solution, fresh moist Robusta coffee grounds from industrial instant coffee production with a water content of 68% and an oil content of 17.3% by dry weight were used.

[0063] Moistened coffee grounds fractions of 27 g and 28 g were each added to a filter having a pore size of 100 μm, respectively, and placed into a beaker. The beakers were each filled with 100 ml of extraction solutions consisting of different mixtures of n-hexane and 2-propanol with a volume ratio between 45:55 and 85:15, and one beaker was filled with pure hexane. The mixture and pure hexane were heated to 60°C. The samples were left in the extraction solution for 10 minutes and then removed. Allow the specimen to drain for an additional minute. The recovered miscellaneous oil was then distilled and the recovered oil determined gravimetrically. The coffee grounds are likewise dried i...

Embodiment 2

[0064] Example 2 Wet extraction of decanted sludge from instant coffee production

[0065] For wet extraction, fresh moist decanted sludge from instant coffee production was used with a water content of 75.4% and an oil content of 14.6% by dry weight. The decanted sludge comes from industrial instant coffee production.

[0066] Wet decanted sludge fractions between 42 and 43 g were placed into beakers respectively and dispersed into 48 to 49 g of extraction solution at 60°C. The extraction solutions were different mixtures of n-hexane and 2-propanol mixtures with a volume ratio between 45:55 and 70:30. The material was left in the extraction solution for 20 minutes. The tramp oil was then filtered and distilled, and the amount of oil recovered was determined gravimetrically. Between 50 and 99% by mass of oil can be obtained from the decanted sludge without drying by means of wet extraction.

Embodiment 3

[0067] Example 3 Wet extraction of Arabica coffee grounds

[0068] For this experiment, deep-frozen industrial Arabica coffee grounds with a residual humidity of 60.4% and an oil content of 31.2% i.Tr. were investigated. Coffee grounds were kept in the refrigerator at 7°C for 24 hours to thaw. For this experiment, a 65:35 (n-hexane:2-propanol) extraction solution was used. 50g of coffee grounds were added to the filter and placed into a beaker. The sample was injected with 100 ml of extractant mixture heated to 60°C and allowed to stand for 15 minutes. Trash oil was then extracted and rinsed three times each with 30 ml of warm extractant mixture. In this way 89% of oil could be obtained, whereas experiments with warm n-hexane showed yields of less than 1%.

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Abstract

The invention relates to a method for wet extraction of oily components from coffee beans and / or of residual materials of coffee production, wherein the coffee beans and / or the residual materials are extracted with a residual moisture content of 10 to 95 mass%, measured relative to the total weight of the coffee beans and / or residual materials of coffee production, using an extraction agent mixture that consists of at least one polar and one non-polar solvent each.

Description

technical field [0001] The present invention relates to a method for extracting oily components from coffee beans and / or coffee production residues having a residual moisture content. Background technique [0002] The current state of the art is that oils, especially vegetable oils, are obtained either by pressing or by extraction. For this purpose, the oily material is first dried and ground (tempered) and then subjected to one process or two processes in succession. Usually, in the latter case first the pressing takes place and then the extraction takes place. In the case of materials with a high oil content, such as rapeseed, pressing has the advantage of being technically relatively simple and sufficiently effective that its use pays off and is profitable. Up to 90% of the oil can be obtained from the material by pressing. The downside is that in addition to the oil the suspension is pressed out, so the oil has to go through several purification steps. [0003] Oil e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23F5/48A23F5/50C11B1/10C11B3/12
CPCA23F5/483A23F5/505C11B1/10C11B3/12
Inventor 安雅·格利绍维奇斯特凡·汉德里克弗兰克·欣里希斯
Owner GCR GLOBAL COMMODITY RESOURCES UG HAFTUNGSBESCHRANKT
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