WO2005112668A1

WO2005112668A1 - Manufacturing method of the stevia-extracts

Info

Publication number: WO2005112668A1
Application number: PCT/KR2005/001510
Authority: WO
Inventors: Soo Sang Park
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-05-24
Filing date: 2005-05-23
Publication date: 2005-12-01
Anticipated expiration: 2006-11-24
Also published as: KR100620854B1; KR20040102322A

Abstract

A method for manufacturing Stevia extract is disclosed, which includes a grinding step; a first separation step; a second separation step; a promotion step; a third separation step; a concentrating step; a fermenting step for mixing the third extract obtained in the third separation step with the concentrated material obtained in the concentrating step for thereby obtaining a mixture and inputting the micro material obtained in the third separation step and the fermenting agent into the mixture and fermenting the same for 24 hours at a room temperature; and a seasoning step for seasoning the materials fermented in the step for more than 60 days.

Description

MANUFACTURING METHOD OF THE STEVIA-EXTRACTS

Technical Field

The present invention relates to a method for manufacturing Stevia

extract.

Background Art

Stevia is chrysanthemum perennial. Its origin is South America and is

well grown in shadow. Stevia has sweet taste 200 times of sugar. It does not

have any toxic, so that it has been used as natural sweetening agent or diet

food. Heating does not change physical property of Stevia. Therefore, raw

leaves or dried leaves of Stevia have been used for tea and have been used as

sweetening agent for food.

Stevia has a very good role for diabetic patients or persons who do diets. However, when Stevia is used in a conventional method, Stevia can be

used only when it is alive. Namely, it cannot be used in winter season. For example, in winter season, dried leaves of Stevia may be used, but its efficacy is bad. Since raw leaves or dried leaves are directly used, there are many inconveniences for storing or using the dried or raw leaves. Disclosure of Invention

Accordingly, it is an object of the present invention to overcome the

above-described problems encountered when using Stevia.

To achieve the above objects, there is provided a method for

manufacturing Stevia extract, comprising a grinding step in which Stevia leaves

having more than 30cm sizes are collected, and a ground or crushed mixture

formed of a grain state material and a liquid state material are mixed is

manufactured; a first separation step for manufacturing a first extract passed

through the through holes of a filter by centrifuge-processing the ground or

crushed materials using a centrifuge having the filter; a second separation step

for filtering the first extract obtained in the first separation step through the filter

and manufacturing a second extract through the through holes of the filter; a

promotion step for heating the second extract obtained in the second separation

step and cooling the same at a room temperature and promoting an

engagement of the same component materials; a third separation step for

filtering the promotion material processed in the promotion step using the filter and producing a third extract passed through the through holes of the filter and micro materials not passed through the filter; a concentrating step for repeatedly

filtering the micro materials not passed through the filter in the third separation step using water and obtaining diluted solution passed through the through holes of the filter and heating and concentrating the diluted solution for

thereby manufacturing concentrated extract; a fermenting step for mixing the

third extract obtained in the third separation step with the concentrated material

obtained in the concentrating step for thereby obtaining a mixture and inputting

the micro material obtained in the third separation step and the fermenting

agent into the mixture and fermenting the same for 24 hours at a room

temperature; and a seasoning step for seasoning the materials fermented in the

step for more than 60 days.

Brief Description of Drawings

The present invention will become better understood with reference to

the accompanying drawings which are given only by way of illustration and thus are not limitative of the present invention, wherein;

Figure 1 is a view of a process according to the present invention.

Best Mode for Carrying Out the Invention

The method for manufacturing Stevia extract according to the present invention will be described with reference to the accompanying drawings.

In the present invention, Stevia raw leaves having sizes of over 3cm are collected and ground using a grinder or crushing machine or millstone

in a grinding step S1 .

At this time, Stevia should be preferably grown with leave sizes of 3cm.

After collecting leaves, they are washed using water. After the above steps are

finished, the leaves are well ground using a grinder or crushing machine or

millstone for thereby producing ground or crushed materials mixed with solid

and liquid materials and having certain viscosity.

In a first separation step S2, a first extract is produced from the ground

or crushed leaves using a centrifuge. In the above process, the centrifuge having a filter with through holes is

used. The sizes of the through holes of the filter are preferably 110(mesh) ~

130(mesh). In this process, stems of large leaves are filtered from the leaves

ground or crushed in the grinding step.

Therefore, when the sizes of the through holes of the filter exceed 110(mesh), the materials having relatively large sizes such as stems of leaves pass through the through holes of the filter. When the sizes of the through holes of the filter are smaller than 130(mesh), micro particles are mixed with liquid having certain viscosity in the liquid material in the ground or crushed Stevia materials, so that they do not pass through the through holes of the filter. In addition, in a second separation step S3 for manufacturing second extract, the first extract separated from the first separation step is

passed through the filter.

At this time, the sizes of the though holes of the filter are 170(mesh) ~

190(mesh). In the above step, particle materials are filtered again in order to

selectively obtain needed materials from the first extract in which large size

materials are first filtered.

Therefore, when the sizes of the through holes of the filter exceed

170(mesh), large size materials pass through the through holes for thereby

resulting in failure. When the sizes of the through holes are smaller than

190(mesh), the sizes of the through holes are too small to pass the materials

having sizes needed in the present invention. Therefore, the first extract is

filtered again for thereby obtaining second extract through the above step.

In addition, the second extract obtained through the second separation

step is heated for thereby promoting an engagement of the same component in

a promotion step S4.

In this step, the engagement of the same components is promoted in

such a manner that various materials included in the second extract in separate

form are heated, and the molecules are activated. Therefore, in this step, the

second extract obtained through the above steps is stored in a certain container

and is directly heated using a heating source. At this time, the conventional heating source and the container are used.

When the temperature of the second extract reaches at 80°C ~ 100°C while

storing the second extract into the container and heating the same, the heating

is stopped. When the temperature of the heating is below 80°C in this step, the

materials of the same component do not well engage with each other. When the

temperature is above 100°C, the components included in the second extract

stored in the container may be burned or melted and attached.

Therefore, the present invention has a third separation step S5. In this

step, the materials passes through the promotion step S5 are filtered using a

filter, and the third extract passed through the filter and the micro material

(micro ingredient) not passed through the filter are obtained in the third

separation step S5.

At this time, the sizes of the through holes of the filter are preferably

240 (mesh) -260 (mesh), and the filter may be made of metallic materials such as

stainless or fiber materials.

When the sizes of the through holes of the filter used in this step are larger than 240 (mesh), the sizes of the same are too large, so that the components that are not needed in the present invention pass through the through holes of the filter. When the sizes of the through holes of the

filter are smaller than 260 (mesh), the components needed in the present

invention do not well pass.

After the steps of the present invention are performed, the materials are

separated into the third extracts passed through the through holes of the filter

and the micro materials not passed through the filter.

In the present invention, a step for compressing the filter may be

selectively adapted in order to fabricate a needed amount of the extracts.

In addition, in a concentrating step S6, the micro materials not passed

through the filter in the third separation step are repeatedly filtered for thereby

producing diluted solution. Thereafter, the diluted solution is concentrated.

In the above step, a small amount of effective components mixed or

attached between the micro materials not passed through the filter in the third

separation step S5 is filtered again. In the above step, water is repeatedly poured onto the micro materials attached to or gathered at the surface of the filter, not passing through the

through holes of the filter as a result of the third separation step S5, so that diluted solution having water as major component and a small amount of effective component is obtained. The thusly obtained diluted liquid is stored in a certain container and is heated for thereby producing a concentrated liquid. Preferably, the diluted liquid

of 10 liters is heated at a temperature of 100°C for three hours and is cooled at

room temperature. The concentrated liquids are prepared based on the cooling

method. The concentrated liquid obtained in the above step and the third extract

are agitated for thereby producing a mixture. Molasses and fermenting agent

are inputted into the mixture and are fermented in a fermenting step S7.

At this time, the mixing ratio of the concentrated liquid and the third

extract that form a mixture is determined by agitating the concentrated liquid

and third extract based on the amount selected by the user.

The micro materials of 3~5weight% obtained in the third separation step

and the fermenting agent of 3~7weight% are inputted into the mixture, and the

resultant mixture is fermented for 24 hours at a room temperature for thereby

producing fermented material. The fermenting agent used in the present invention is one of the known

materials such as yeast or molasses generally used for fermentation.

In the present invention, Stevia extract is manufactured through a seasoning step S8 in which the fermented material in the above step is seasoned. In the seasoning step, the fermented material obtained in the fermenting step S7 is seasoned for above 60 days at room temperature for thereby manufacturing Stevia extract. At this time, when the seasoning period is shorter than 60 days, the

fermented material processed through the fermenting step is not fully seasoned.

Therefore, it is preferred to season for more than 60 days. The seasoning step

is performed at room temperature under dark environment.

The amount of Stevia extract manufactured according to the present

invention is selectively determined based on the effective component of Stevia

known as useful sugar source that is non-harmful and good for human body.

Industrial Applicability As described above, Stevia extract according to the present invention

can be used at any place and any time whenever a user wants to use it. Since it

is made in extract form, a small amount of Stevia extract can be used by diluting

the same. Even when only a small amount of Stevia extract is used, it is possible to maximize the effect with its good convenience in use. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described examples are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

Claims:

1. A method for manufacturing Stevia extract, comprising: a grinding step S1 in which Stevia leaves are collected, and a ground or

crushed mixture formed of a grain state material and a liquid state material are

mixed is manufactured; a first separation step S2 for manufacturing a first extract passed

through the through holes of a filter by centrifuge-processing the ground or

crushed materials using a centrifuge having the filter; a second separation step S3 for filtering the first extract obtained in the

first separation step S2 through the filter and manufacturing a second extract

through the through holes of the filter; a promotion step S4 for heating the second extract obtained in the

second separation step S3 and cooling the same at a room temperature and

promoting an engagement of the same component materials; a third separation step S5 for filtering the promotion material processed in the promotion step S4 using the filter and producing a third extract passed

through the through holes of the filter and micro materials not passed through

the filter; a concentrating step S6 for repeatedly filtering the micro materials not passed through the filter in the third separation step S5 using water and obtaining diluted solution passed through the through holes of the filter and heating and concentrating the diluted solution for thereby manufacturing concentrated extract; a fermenting step S7 for mixing the third extract obtained in the third

separation step S5 with the concentrated material obtained in the concentrating

step S6 for thereby obtaining a mixture and inputting the micro material

obtained in the third separation step and the fermenting agent into the mixture

and fermenting the same for 24 hours at a room temperature; and a seasoning step S8 for seasoning the materials fermented in the step

S7 for more than 60 days.

2. The method of claim 1 , wherein said filter used in the first separation

step has the through holes of sizes of 110(mesh)~ 130 (mesh).

3. The method of claim 1 , wherein said filter used in the second separation

step has the through holes of sizes of 170(mesh)~190(mesh).

4. The method of claim 1 , wherein said filter used in the third separation step has the through holes of sizes of 240(mesh)~260(mesh).

5. The method of claim 1 , wherein in said concentrating step S67, the diluted solution of 100 liters is heated for 3 hours at a temperature of 100°C when manufacturing the diluted solution by heating the diluted liquid.

6. The method of claim 1 , wherein in said fermenting step, a micro agent

of 3~5weight% obtained in the third separation step and a fermenting agent of

3~7weight% are inputted into a mixture obtained by mixing the third extract

obtained in the third separation step S5 into the concentrated material obtained

in the concentrating step S6, and then the thusly mixed material is fermented for

24 hours at a room temperature.