Extracting method of sisal hemp pectin

Abstract

The invention discloses an extracting method of sisal hemp pectin. The extracting method comprises the following steps: 1, dividing sisal hemp residues into two parts, adding water into the lesser part of the sisal hemp residues, boiling to obtain a first mixed solution, and adding water into the other part of the sisal hemp residues to obtain a second mixed solution; 2, adding galactose into the first mixed solution, inoculating a beer yeast, fermenting to obtain fermentation liquor, adding the fermentation liquor into the second mixed solution, fermenting to obtain secondary fermentation liquor, supplementing galactose during fermentation, cooling the secondary fermentation liquor to obtain a mixed solution, filtering, collecting filtrate, and concentrating the filtrate to obtain a concentrated solution; 3, adding ethanol into the concentrated solution, then performing centrifugal separation, and collecting a precipitate; and 4, air-drying the precipitate, then drying, and crushing to obtain the sisal hemp pectin. According to the extracting method disclosed by the invention, pectin is extracted by adopting a microbiological fermentation method, the extracted pectin is relatively high in molecular mass and high in extraction rate, does not need heat and acid treatments, and is low in consumption and pollution and higher in galacturonic acid content.

Description

technical field [0001] The invention relates to a preparation method, more specifically, the invention relates to a method for extracting sisal pectin. Background technique [0002] Pectin is a component of the cell wall of higher plants. It exists along with cellulose and forms the adhesive substance in the middle layer of adjacent cells, so that the plant tissue cells are tightly bonded together. In the food industry, pectin can be used as a thickener, stabilizer, etc., and in the pharmaceutical industry, it has functions such as antibacterial, anti-inflammatory, hypoglycemic and lipid-lowering, and adsorption of toxic metal ions. The annual demand for pectin in the world is nearly 45,000 tons. At present, my country consumes more than 2,000 tons of pectin every year, 80% of which are imported from abroad. [0003] At present, the raw materials of commercial pectin are mainly extracted from the peel residues of apples and pears, and can also be extracted from watermelon p...

AI Technical Summary

Problems solved by technology

However, the pectin-acid production process is not suitable for the preparation of pectin from sisal. The main reason is: unlike the pectin that has been partially degraded during the ripening process of the fruit, the pectin in the sisal residue is basically not decomposed, and the pectin is extracted by the acid method. The extraction rate of sisal pectin is very low and the acid pollution is large, therefore, it is necessary to find a more effective method for extracting sisal pectin

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