KR20180100102A - Preparation method of Rice bran extract - Google Patents

Abstract

The present invention relates to a method for producing a rice bran extract powder, and specifically, provides a method for producing a rice bran extract powder, which effectively inhibits rancidity of the rice bran extract and when the rice bran extract is spray-dried, production yield and flowability of the powder are remarkably improved. The method for producing the rice bran extract powder according to the present invention is effectively protects active ingredients of the rice bran by inhibiting the rancidity of the rice bran extract, and when the rice bran extract is spray-dried, production yield and flowability (fluidity) of the powder can be improved, thereby exhibiting an excellent processability.

Description

Preparation method of Rice bran extract "

The present invention relates to a method for producing a rice bran extract powder, which effectively inhibits rancidity of a rice bran extract and significantly improves production yield and flowability of the rice bran extract when spray-dried. .

On the other hand, rice is a valuable food resource, one of the world's top three grains, which is half of the world's population, and is a key resource in the country that can not be confronted with other crops, especially in Asia. Rice, which is rice husk, which is the surface of rice, is called brown rice, rice rice with rice husk and rice husk is removed and rice is called white rice.

In particular, rice bran contains many vitamins and minerals and contains many physiologically active substances. However, most of the 500,000 tons of rice bran (rice bran) produced in Korea is used with low added value due to feed or organic compost. Rice bran contains vitamins, minerals, various unsaturated fatty acids, tocopherol; Lipophilic substances such as tocotrienol, gamma oruzanol; It contains water-soluble substances such as phytic acid, guar, ceramide, lecithin and inositol.

Korean Pat. No. 1336411 discloses a novel use for the improvement, prevention or treatment of sleep disorder, anxiety or depression using rice bran extract as an active ingredient.

However, not only the active ingredient contained in the rice bran is easily lost due to rancidity, but also the rice bran extract coagulates with each other when spray-dried, and the powder is adhered to the inner wall of the spray dryer, The flowability of the rice bran extract powder is remarkably lowered.

Therefore, in the present invention, it is possible to effectively inhibit rancidity of the rice bran extract, effectively protect the active ingredient of the rice bran associated with the improvement of the water surface, and significantly improve the production yield and the flowability of the powder when the extract is spray- And to improve the formulation or processability of the product using the extract powder.

Korean Patent No. 1336411

Accordingly, it is an object of the present invention to overcome the problems of the prior art by effectively inhibiting rancidity of rice bran extract and effectively protecting the effective ingredient of rice bran, and improving the yield and the flowability (fluidity) of the powder when the rice bran extract is spray- And a method for producing the rice bran extract powder.

According to an exemplary aspect of the present invention,

Extracting the rice bran with water, an alcohol having 1 to 4 carbon atoms, or a mixed solvent thereof;

Concentrating the rice bran extract obtained in the above step;

Mixing the rice bran extract concentrate obtained in the above step with polyoxyethylene sorbitol monolaurate and casein sodium; And

And spray-drying the mixture obtained in the above step.

The rice bran in the step of extracting the rice bran is preferably cooked at a temperature of 60 to 120 ° C for 0.5 to 2 hours.

It is preferable that d-tocopherol is further added and mixed in the mixing step.

Preferably, the mixing step comprises mixing 0.5 to 1.5 parts by weight of polyoxyethylene sorbitol monolaurate, 2 to 5 parts by weight of casein sodium, and 0.01 to 0.1 parts by weight of d-tocopherol based on the total weight.

The spray drying step is preferably carried out at an inlet temperature of 150 to 170 DEG C, an outlet temperature of 80 to 100 DEG C and a flow rate of 8 to 10 L / h.

The method of producing rice bran extract according to the present invention can effectively inhibit the acidity of the rice bran extract to effectively protect the effective ingredient of the rice bran and improve the flow rate (flowability) of the production yield and powder when the rice bran extract is spray dried And exhibits excellent workability.

FIG. 1 is an image showing the results of measurement of changes in acid value of rice bran mixed with rice bran and rice bran without any treatment.
Fig. 2 is an image obtained after 60 days of storage of the acid value change of the rice bran extract powder of Examples 1 and 2.

Hereinafter, various aspects and various embodiments of the present invention will be described in more detail.

According to an aspect of the present invention,

Extracting the rice bran with water, an alcohol having 1 to 4 carbon atoms, or a mixed solvent thereof;

Concentrating the rice bran extract obtained in the above step;

Mixing the rice bran extract concentrate obtained in the above step with polyoxyethylene sorbitol monolaurate and casein sodium; And

And spray drying the mixture obtained in the above step. The present invention also provides a method for producing a rice bran extract powder.

The rice bran used in the step of extracting the rice bran is preferably used after being boiled, and the rancidity of the rice bran extract can be effectively inhibited by the boiling process.

It is preferable that the rice bran is matured at a temperature of 60 to 120 ° C for 0.5 to 2 hours. If the temperature is outside the range of the boiling temperature and time, the effective ingredient of the rice bran deteriorates or the effect of inhibiting rancidity is significantly lowered It is not preferable.

That is, in the extracting step, it is preferable that the rice bran, which has been cooked through the above-mentioned steaming process, is added to the solvent and the reaction is carried out at a temperature of 35 to 45 ° C for 5 to 10 hours. If the temperature is outside the extraction temperature and time range, the effective component of the rice bran may be lost.

In this case, it is more preferable to use a mixed solvent in which the alcohol having a carbon number of 1 to 4 and the water in a weight ratio of 1: 2 to 4 is mixed at a concentration of 60 to 95% The most outstanding.

The extracted rice bran extract may be concentrated through a concentration step. If necessary, the extraction step may be followed by a concentration step.

Specifically, the concentration is preferably carried out at a temperature of 20 to 65 ° C using a vacuum vacuum concentrator, and is preferably concentrated to a concentration of 10 to 20 Brix, Suitable concentration.

The mixing step is a step of adding polyoxyethylene sorbitol monolaurate and sodium caseinate to a concentrated solution of the concentrated rice bran extract through the concentration step and mixing.

And preferably d-tocopherol is further added thereto. The polyoxyethylene sorbitol monolaurate, sodium caseinate and d-tocophenol serve to improve the flowability of the powder.

More preferably, 0.5 to 1.5 parts by weight of polyoxyethylene sorbitol monolaurate, 2 to 5 parts by weight of sodium caseinate, and 0.01 to 0.1 part by weight of d-tocopherol are mixed with respect to the total weight of the composition, The flowability of the powder was remarkably improved, and when the flow rate exceeded the above range, the flowability of the powder was remarkably lowered.

The mixture obtained through the mixing step may be further sterilized prior to performing the spray drying step. Preferably, the sterilization is performed by performing the sterilization process at a temperature of 70 to 90 ° C for 5 to 30 minutes , But is not limited thereto.

Preferably, the mixture obtained through the sterilization process is pulverized through spray drying. At this time, spray drying is performed under conditions of inlet temperature of 150 to 170 ° C, outlet temperature of 80 to 100 ° C and flow rate of 8 to 10 L / h . When the spray drying was carried out under the above conditions, the yield of the rice bran extract powder was the highest.

Hereinafter, the present invention will be described in more detail with reference to Examples and the like, but the scope and content of the present invention can not be construed to be limited or limited by the following Examples. 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 present invention as set forth in the following claims. It is natural that it belongs to the claims.

In addition, the experimental results presented below only show representative experimental results of the embodiments and the comparative examples, and the respective effects of various embodiments of the present invention which are not explicitly described below will be specifically described in the corresponding part.

(Preparation Example: Preparation of Rice Bran Prepared)

The rice bran was stirred at a temperature of 90 ° C for 1 hour.

On June 5, 2014, 40 days old seedlings were cultivated at 30 × 14 cm and 23.8 weeks / m ² in Naju-si Pampa, which was cultivated in the same area and cultivated by the same grower for 3 years. . We applied 1,500 kg of hairy rubies and 3 kg / 10a of nitrogen, and weeds were weighed 5 kg / 10a after 5 days of transplanting, By weight and dried.

(Example 1 and Comparative Examples 1 to 8: Preparation of Rice Bran Extract Powder Using Ripened Rice Bran)

The mixture was added to 500 g of the rice bran mixed with the extraction solvent mixed with 95% ethanol and purified water, extracted at a temperature of 40 (± 3) ° C for 8 hours, filtered (decanter or vibrator) The filtrate was concentrated to 13 (± 2) Brix at a temperature of 65 ° C. or lower using a vacuum decompression concentrator.

The additives were added to 96.13 wt% of concentrated rice bran extract concentrate as shown in Table 1 below, homogenized by stirring at 3000 rpm for 10 minutes, sterilized at 80 (± 3) ° C for 15 minutes, spray dried Method, the rice bran extract powder was prepared by drying under the conditions of the inlet temperature of 160 ° C, the outlet temperature of 90 ° C and the flow rate of 8-10 L / h.

division d-tocopherol Tween 20 Casein sodium Example 1 0.03 1.2 3 Comparative Example 1 - - - Comparative Example 2 0.03 0.3 - Comparative Example 3 0.03 0.8 - Comparative Example 4 0.03 1.2 - Comparative Example 5 0.03 1.7 - Comparative Example 6 0.03 1.2 One Comparative Example 7 0.03 - 3 Comparative Example 8 0.03 1.2 6

(* Tween 20: polyoxyethylene sorbitol monolaurate)

(Example 2: Preparation of Rice Bran Extract Powder Using Uncooked Rice Bran)

The rice bran extract powder was prepared in the same manner as in Example 1 except that rice bran, which had not undergone any treatment, was used instead of the wheat bran in the preparation example.

(Test Example 1: Analysis of Fat Content of Rice Bran Extract Powder)

In order to analyze the content of fat in the components of the rice bran extract powder of Example 1, (New) Food Code Article 9 General Testing Methods 1. Food ingredient test method 1.1 General component test method 1.1.5 Lipid 1.1.5.1 Fat 1.1.5.1 .2 acid decomposition method c. The content of crude fat was calculated by the following equation through the test of wheat flour and macaroni.

[formula]

As a result, the crude fat content of the rice bran extract powder was found to be 14.03%.

( Test Example  2: acid value change test of rice bran)

In order to confirm the acid value change of the rice bran, acid and change of the rice bran mixed in the preparation example and the untreated rice bran were measured and the results are shown in Table 2 and FIG.

However, the acid value was measured by taking 1 g of the sample and suspending it well in 10 mL of distilled water, adding 2 to 3 drops of phenolphthalein and titrating with 0.1 N NaOH to calculate the titratable acidity with the amount of NaOH consumed at the time of red coloration (Control) and 9 days after storage, respectively.

division Unprocessed rice bran Cooked rice bran
(Production Example 1) Control 17.517 16.961 After nine days 65.342 16.961

According to the above Table 2 and FIG. 1, the rice bran which had been cooked and the rice bran which had not been treated before showed similar acid value at the beginning, but after 9 days (storage at room temperature 25 ° C) And the acid value of the rice bran increased about 3.7 times. On the other hand, the acid value of the rice wheat was not changed after 9 days, indicating that no rancidity occurred at all.

(Test Example 3: acid value change test of rice bran extract powder)

The acid value changes of the rice bran extract powder were measured and the results are shown in Table 3 and FIG. (The acid value was measured by the same method as in Test Example 1, and the storage temperature was kept at 45 캜.)

division Example 1 Example 2 Control 25.8 31.0 After 7 days 26.4 33.2 After 15 days 26.6 35.7 After 30 days 26.8 38.7 After 45 days 27.4 44.2 After 60 days 27.8 48.4

As can be seen from Table 3, the rice bran extract powder prepared using the whey rice bran of Example 1 showed insignificant changes in acid value, indicating that rancidity was effectively suppressed. On the other hand, in the case of Example 2 using unmixed rice bran, the change in the acid value was remarkable and it can be confirmed that the rancidity significantly progressed.

(Test Example 4: Flow test of powder)

To determine the flowability of the powder to the rice bran extract powder of Example 1 and Comparative Examples 1 to 8, 30 g of each sample was collected and stirred at 100 rpm for 2 minutes, and the degree of coagulation and fluidity were measured. Are shown in Table 4 below.

However, the coagulation degree was visually confirmed, and the evaluation method was as follows: No aggregation phenomenon of powder particles (X), Coagulation phenomenon was somewhat (?), Coagulation phenomenon was common (○) Respectively.

In addition, the flow rate (cm3 / sec) is measured between the upper and lower ends of a glass tube having an inner diameter of 3.5 cm and a length of 60 cm, The volume was determined to evaluate the fluidity of the powder.

division Cohesiveness liquidity Example 1 × 115 Comparative Example 1 ◎ 52 Comparative Example 2 ◎ 58 Comparative Example 3 ◎ 50 Comparative Example 4 ◎ 49 Comparative Example 5 ◎ 53 Comparative Example 6 ○ 71 Comparative Example 7 ◎ 51 Comparative Example 8 ○ 82

Therefore, the method for producing rice bran extract according to the present invention is effective in protecting the active ingredient of rice bran by inhibiting rancidity of the rice bran extract and improving the yield and the flowability (fluidity) of the powder when spray drying the rice bran extract And exhibits an excellent workability.

Claims (5)

Extracting the rice bran with water, an alcohol having 1 to 4 carbon atoms, or a mixed solvent thereof;
Concentrating the rice bran extract obtained in the above step; And
And mixing the rice bran extract concentrate obtained in the above step with polyoxyethylene sorbitol monolaurate and casein sodium.
The method according to claim 1,
Wherein the rice bran extracted from the rice bran is cooked at a temperature of 60 to 120 캜 for 0.5 to 2 hours.
3. The method of claim 2,
Wherein the mixing step further comprises adding d-tocopherol to the mixture.
The method of claim 3,
4. The method according to any one of claims 1 to 3,
Wherein the mixing is performed by adding 0.5 to 1.5 parts by weight of polyoxyethylene sorbitol monolaurate, 2 to 5 parts by weight of sodium caseinate, and 0.01 to 0.1 parts by weight of d-tocopherol to the whole weight portion. A method for producing an extract powder.
5. The method of claim 4,
Wherein the spray drying step is performed at an inlet temperature of 150 to 170 DEG C, an outlet temperature of 80 to 100 DEG C and a flow rate of 8 to 10 L / h.

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