SU1612191A1 - Method of drying biologically active materials of vegetative origin - Google Patents

Abstract

The invention relates to drying and can be used in the food, chemical and other industries. The purpose of the invention is to improve the quality of the material. The dried material is mixed to a homogeneous state with sodium bicarbonate before freezing, the amount of which is 5-15% of the amount of the dried material. The resulting mixture is poured into cuvettes and frozen. Next, the cuvettes with the frozen material are sent to the vacuum chamber of the sublimation unit, where they are dried to the desired final moisture. 1 tab.

Description

The invention relates to the field of drying and can be used in the food industry, chemical, medical and other industries in the industry for dehydrating the extractives of plant raw materials, fruit, vegetable juices and their concentrates.

The aim of the invention is to improve the quality.

The introduction of crystalline sodium bicarbonate into the initial dried material leads to an increase in the crystalline phase in the dried material, which improves its quality, reduces its hygroscopicity, and increases storage stability.

The introduction of sodium bicarbonate in an amount below 5% of the amount of material does not give the desired result, and the introduction of sodium bicarbonate in an amount above 15% of the amount of material leads to its excessive content in the finished product.

The method is carried out as follows.

The starting material and 5-15% of the amount of the sodium bicarbonate material being dried are fed into the mixer and mixed until homogeneous. The resulting mixture is poured into cuvettes and frozen. Next, the cuvettes with the frozen material are directed into the vacuum chamber of the sublimation mouth. novki, where they are dried to a given final humidity.

Example .. An extract from the year of an Aronian rbine with a dry matter content of 36% and a density of 1.175 g / cm, taken in an amount of 100 ml, is mixed with sodium bicarbonate, taken in an amount of 5% of the extract mass to obtain a homogeneous mass, in the pan. The baking tray is placed in a hot cell and frozen to -30 ° C. The bitch is carried out in a sublimation unit with the following external process parameters; the temperature of heating plates is 40 ° С, the temperature of the condenser-freezer is -60 ° С, the average pressure in the vacuum chamber is 20. Pa.

fsmi

HS

Drink

R

".

The moisture content of the product after drying is 1.35%. The yield of dry material with a porous structure of 47.35 g. Drying was carried out for 6 h 30 min.

Example 2. 100 ml of black chokeberry extract are mixed with 10% of the amount of sodium hydrogen carbonate extract. Freezing and drying by sublimation was carried out similarly to example 1.

Humidity dry product 1.3%. The yield of dry material with a porous structure of 52.36 g. Drying was carried out for 5 h 30 min.

Example 3. 100 ml of black chokeberry extract were mixed with 15% sodium hydrogen carbonate. Freezing and subsequent freeze-drying was carried out as in Example 1.

Humidity dry product L2%. The yield of dry material with a porous structure of 62.39 g. Drying was carried out for 4 h 30 min.

In order to substantiate the selected parameters, additional studies were carried out with outrageous values.

Example 4. 100 ml of black chokeberry extract are mixed with 20% hydrocarbo-: 11 sodium. Freezing and controlled freeze-drying were performed similarly to the example.

 Humidity dry product 1.6%. The yield of dry material with a porous structure of 62.39 g. Drying was carried out for 5 hours. Excess content of sodium hydrocarbopaths.

JJpuMep 5. 100 ml of black chokeberry extract are mixed with 2% sodium bicarbonate. Freezing and. the subsequent freeze drying was carried out in accordance with Example 1.

The moisture content of the dry product is 1.6%, the yield of the dry material is 44.3 g (the product does not have a porous structure). Drying was carried out for 6 h 45 min.

Data on the drying of biologically active materials (natural extracts and juices) are given in the table.

As can be seen from the table, the most effective introduction of sodium bicarbonate into

within 5-i5% of the amount of material, since insertion of 2% does not give the desired result, and the introduction of 20% or more leads to its excessive content in the finished product.

After drying, the dry product was subjected

storage for one month. During storage, the product retained a powdery structure.

Claims (1)

Invention Formula A method of drying biologically active materials of plant origin by freezing them and subsequent sublimation to a given final moisture, characterized in that, in order to improve quality, before freezing, the material is mixed to a homogeneous state with sodium bicarbonate, the amount of which is 5-- 15% of the amount of dried material.