METHOD FOR EXTRACTING PECTIN SUBSTANCES FROM BERRY RAW MATERIALS Russian patent published in 2022 - IPC A23L29/231 C08B37/06 

FIELD: food industry.

SUBSTANCE: invention relates to the food industry, namely to the production of pectin substances and can be used in the production of food products containing pectin. The objective of the present invention is to reduce the extraction time, increase the yield of pectin, improve the environmental friendliness of the pectin production process. The objective and the specified effect are achieved due to the fact that in the method for extracting pectin substances from berry raw materials, which consists in double sequential extraction of pomace from vegetable raw materials with an acid solution, followed by precipitation of pectin substances from the extract with ethyl alcohol and drying pectin, according to the invention, 0.5% sulfuric acid at a ratio of 1:100 during the first extraction, which is carried out for 40 minutes at a temperature of 75°C, 1% sulfuric acid at a ratio of 1:50 during the second extraction, which is carried out for 20 minutes at a temperature of 95°C, the extracts are filtered, the filter residue is washed with a 3% sodium bicarbonate solution, the obtained extracts are combined, evaporated three times, after which the pectin is precipitated with 96% ethyl alcohol, centrifuged for 7 minutes at a speed of 5000 rpm , the supernatant is drained, the pectin is dried and, if necessary, crushed. The proposed method for extracting pectin substances from berry raw materials allows to reduce the extraction time, increases the yield of pectin substances, and contributes to the greening of the pectin production process.

EFFECT: increasing the rate of acid hydrolysis of raw materials along with reducing the extraction time when using sulfuric acid as an extracting solution, which exhibits high acidic properties, as well as neutralizing the residual amount of sulfuric acid in the filter residue after extraction.

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