KR20140103465A - A method of extracting oil from coffee sludge - Google Patents

Abstract

The present invention relates to a method for extracting fat and oil from coffee sludge and coffee sludge oil extracted through the same. According to the method for extracting fat and oil from coffee sludge remaining after coffee is extracted, oil is extracted from coffee extracted residues without the additional material expenses. The method has very excellent economical feasibility in terms of the production cost of coffee oil compared to existing techniques. Moreover, the coffee sludge is hydrothermally dipped so that caffeine remaining in the coffee sludge can be completed removed. Also, degumming and deoxidizing steps are performed so that pure fat and oil can be obtained and higher value-added coffee sludge can be produced. The coffee sludge can be very usefully used in related fields.

Description

[0001] The present invention relates to a method for extracting oils from a coffee bean,

The present invention relates to a method for extracting oils from a coffee bean and a coffee bean oil extracted thereby, and more particularly, to a method for extracting a bean curd from a coffee bean remaining after coffee extraction, The method comprising:

Coffee has long been a favorite drink of choice for people all over the world. Recently, such functionalities as antimicrobial, anticancer and antioxidant activity of coffee have been reported. Especially, there is a lot of interest in the antioxidative activity of coffee among these studies. To date, the antioxidative activity of coffee has been found in tocopherols contained in coffee beans and is reported to be caused by a polymer formed by the Maillard reaction in the course of chlorogenic acid or coffee roasting. Coffea, which accounts for about 48% of the raw materials in the coffee production process, is supplied to the Spent Boiler as a fuel source and used as alternative energy, or sold to a fertilizer company for soil improvement. In Korea, researches and developments have been made to increase the utilization of coffee as a byproduct of coffee, such as the production of activated carbon using coffee beans, the production of organic soil improving agent, and the development of a substrate for mushroom fruiting body production.

In the case of a company with a 3% market share of coffee, about 3,000 tons of coffee beans per year remain. Especially, when coffee beans are roasted and extracted with hot water to make instant coffee and concentrate, a large amount of coffee beans remain.

However, there have been no researches on the method of extracting oils from coffee beans.

Based on the theory that coffee beans contain 20 to 30% of fat, the inventors of the present invention have focused on the fact that the coffee sludge remaining after coffee extraction will contain a large amount of oils, thereby extracting the oils from the coffee beans Caffeine should be removed to be used as a general preservative. Caffeine is not tolerated by people but it stimulates the central nervous system to regain fatigue and metabolism. have. Thus, the present invention has been accomplished by discovering that the residual caffeine is completely removed by carrying out a step of removing water-soluble residual caffeine in order to make a fat that can be used by all.

Accordingly, a technical problem to be solved by the present invention is to provide a method for extracting a frying oil in which residual caffeine has been completely removed in a method for extracting frying oil from coffee leaves remaining after coffee extraction.

In order to accomplish the above object, the present invention provides a method for extracting residual caffeine-free oil from a coffee bean comprising the steps of:

(S1) mixing a coffee bean and water in a weight ratio of 1: 3 and then immersing in hot water at 75 to 85 ° C for 1 hour to remove residual caffeine;

(S2) drying the residual caffeinated coffee beans at 80 to 90 DEG C until the moisture content is 3.5 to 4.5%; And

(S3) milking and standing the dried coffee bean to obtain a fat or oil; And

(S4) deodorizing the resulting oil to obtain a residual caffeine-free oil.

The present invention also provides a method for extracting residual caffeine-free oil from a coffee bean comprising the steps of:

(S1) mixing a coffee bean and water in a weight ratio of 1: 3 and then immersing in hot water at 75 to 85 ° C for 1 hour to remove residual caffeine;

(S2) drying the residual caffeinated coffee beans at 80 to 90 DEG C until the moisture content is 3.5 to 4.5%; And

(S3) milking and extracting the dried coffee bean to obtain a fat or oil;

(S4) precipitating the obtained oil-retaining oil for 1 hour, followed by deflocculation and deoxidation; And

(S5) washing and dewaxing and deodorizing the obtained oils to obtain a residual caffeine-free oil.

As described above, according to the method of extracting the oils from the coffee leaves after the coffee extraction according to the present invention, it is possible to extract the oil from the coffee extract residue without any additional burden of the material cost. As a result, . In addition, since the caffeine remaining in the coffee beans can be completely removed by conducting the step of immersing the coffee beans in hot water, the debranching and deoxidation process can be performed to obtain a more pure oil cake, so that a high value- It is expected to be very useful in the field.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a method for extracting oils (high-grade oils) from the coffee beans of the present invention.
Fig. 2 shows a method for extracting oils (general oil) from a coffee bean of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail to the concrete inventive concept.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

The method for extracting residual caffeine-free oil from coffee beans of the present invention is characterized in that it comprises the following steps:

(S1) mixing a coffee bean and water in a weight ratio of 1: 3 and then immersing in hot water at 75 to 85 ° C for 1 hour to remove residual caffeine;

(S2) drying the residual caffeinated coffee beans at 80 to 90 DEG C until the moisture content is 3.5 to 4.5%; And

(S3) milking and standing the dried coffee bean to obtain a fat or oil; And

(S4) deodorizing the resulting oil to obtain a residual caffeine-free oil.

Preferably, the oil obtained according to the method of the present invention is a high-grade oil. In this case, a method similar to a general sesame oil extraction method can be used. Such high-grade preservation is low in the amount of extracted and preserved, but it may contain a large amount of antioxidants such as coffee active ingredients, tocopherol and the like. Such a high-grade fat can be used as a fine fat due to the inclusion of a functional material, for example, as a well-being, for example, dressing, flavor oil, as well as beauty products such as essential oils and cleansing oils.

The present invention also provides a method for extracting residual caffeine-free oil from a coffee bean comprising the steps of:

(S1) mixing a coffee bean and water in a weight ratio of 1: 3 and then immersing in hot water at 75 to 85 ° C for 1 hour to remove residual caffeine;

(S2) drying the residual caffeinated coffee beans at 80 to 90 DEG C until the moisture content is 3.5 to 4.5%; And

(S3) milking and extracting the dried coffee bean to obtain a fat or oil;

(S4) precipitating the obtained oil-retaining oil for 1 hour, followed by deflocculation and deoxidation; And

(S5) washing and dewaxing and deodorizing the obtained oils to obtain a residual caffeine-free oil.

Preferably, the oil obtained in accordance with the present invention is a general oil, and such general oil oil extraction can be used for frying oil. The extraction method uses the same method as that for general edible oil, and is not particularly limited.

The general fat extracted according to this method can be used as biodiesel as well as other processes such as frying oil, confectionery cream oil for general households and businesses.

The oil content of coffee beans varies depending on the type of bean, but usually exists in 9-18% (dry base) for green beans and 11-20% (dry base) for roasted coffee beans. Although it is washed out in the extraction process, most of it remains in the coffee beans. Therefore, according to the present invention, it is possible to economically extract the oils from the coffee beans.

The method of extracting the fats from the coffee beans of the present invention is characterized in that it comprises a residual caffeine removal step wherein the optimum temperature of the hot water for immersion of the coffee bean is 75 to 85 캜, preferably 80 캜. It is most preferable that the weight ratio of coffee bean and water is 1: 3, and the most economical in terms of usability.

It has the advantage of completely removing residual caffeine which is a water-soluble substance through the hot water immersion step of the present invention.

In the method of extracting oils from the coffee beans of the present invention, drying is carried out at 80 to 90 ° C. When the drying temperature exceeds 90 ° C at this time, carbides are generated to generate benzopyrene and acrylamide, C, there is a problem that the drying time becomes long.

The drying step is performed until the water content is 3.5 to 4.5%, preferably 4%. When the moisture content is more than 4.5%, the yield of the oil is drastically lowered due to the pressure increase at the subsequent extraction step If the moisture content is less than 3.5%, the solvent tends to be difficult to penetrate into the coffee bean tissue at the time of extraction, thereby lowering the yield.

Thereafter, the extraction and precipitation steps use the same process as the extraction method of ordinary oils and fats, and are not particularly limited.

As described above, according to the method of extracting the oils from the coffee leaves after the coffee extraction according to the present invention, it is possible to extract the oil from the coffee extract residue without any additional burden of the material cost. As a result, . In addition, the caffeine remaining in the coffee beans can be completely removed by subjecting the coffee bean to a hot water immersion step, and deionization and deoxidation can be performed to obtain a more pure oil, which can be very useful in the art .

Hereinafter, embodiments of the present invention will be described in detail to facilitate understanding of the present invention. However, the embodiments according to the present invention can be modified into various other forms, and the scope of the present invention should not be construed as being limited to the following embodiments. Embodiments of the invention are provided to more fully describe the present invention to those skilled in the art.

≪ Example 1 >

The remaining coffee bean and water were mixed at a weight ratio of 1: 3 and then immersed in hot water at 80 ° C for 1 hour to remove residual caffeine.

The coffee bean having residual caffeine removed was dried at 85 DEG C until the moisture content became 4%, then milked and allowed to stand for 12 hours to obtain a frying oil, which was then deodorized to extract the residual caffeine-free frying oil.

The contents of various components in the obtained oils were measured and the results are shown in Table 1 below.

As shown in the above Table 1, the fats obtained according to the present invention had a very low content of caffeine and a significant reduction in caffeine content, such as tocopherol, which was a premium oil having a composition of fatty acids C12 and below of 0% and fatty acids C14 and above of 100% It can be seen that it is a high-grade oil containing a large amount and a very reduced benzopyrene.

The fatty acid content was further measured for the above oils and the results are shown in Table 2 below.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as set forth in the appended claims. will be.

As described above, according to the method of extracting the oils from the coffee leaves after the coffee extraction according to the present invention, it is possible to extract the oil from the coffee extract residue without any additional burden of the material cost. As a result, . In addition, since the caffeine remaining in the coffee beans can be completely removed by conducting the step of immersing the coffee beans in hot water, the debranching and deoxidation process can be performed to obtain a more pure oil cake, so that a high value- It is expected to be very useful in the field.

Claims (6)

A method for extracting residual caffeine-free oil from a coffee bean comprising the steps of:
(S1) mixing a coffee bean and water in a weight ratio of 1: 3 and then immersing in hot water at 75 to 85 ° C for 1 hour to remove residual caffeine;
(S2) drying the residual caffeinated coffee beans at 80 to 90 DEG C until the moisture content is 3.5 to 4.5%; And
(S3) milking and standing the dried coffee bean to obtain a fat or oil; And
(S4) deodorizing the resulting oil to obtain a residual caffeine-free oil. The method according to claim 1, wherein the oil is a high-grade oil. The method according to claim 1,
Characterized in that the oil is used as a dressing, flavoring oil, essential or cleansing oil. A method for extracting residual caffeine-free oil from a coffee bean comprising the steps of:
(S1) mixing a coffee bean and water in a weight ratio of 1: 3 and then immersing in hot water at 75 to 85 ° C for 1 hour to remove residual caffeine;
(S2) drying the residual caffeinated coffee beans at 80 to 90 DEG C until the moisture content is 3.5 to 4.5%; And
(S3) milking and extracting the dried coffee bean to obtain a fat or oil;
(S4) precipitating the obtained oil-retaining oil for 1 hour, followed by deflocculation and deoxidation; And
(S5) washing and dewaxing and deodorizing the obtained oils to obtain a residual caffeine-free oil. 5. The method of claim 4, wherein the oil is a general oil. The method according to claim 4, wherein the oil is used as frying oil, cream oil for confectionery baking, or biodiesel.

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