Mixed acid, decoloring method and pectin extraction method

Abstract

The invention discloses a mixed acid, a decoloring method and a pectin extraction method. The mixed acid comprises concentrated hydrochloric acid and carbonic acid, the dosage volume ratio of concentrated hydrochloric acid to carbonic acid ranges from 1:5 to 3:1, and the pH value is between 0.5 and 3.0. The decoloring method comprises the following steps: carrying out sample loading on a total pectin extracting solution by using a wet process, and decoloring through a column chromatography using a macroporous resin AB-8 filler; controlling the temperature of upper cylinder liquid between 30 DEG C and 40 DEG C, the pH value of the upper cylinder liquid between 4 and 6, and the flow rate of the upper cylinder liquid between 3 BV / h and 5 BV / h. The pectin extraction method comprises the following steps: treating raw materials by adopting steam explosion; applying the mixed acid to carry out acid extraction on the raw materials to obtain an original extract; extracting to obtain pectin after decoloring by using the decoloring method. According to the pectin extraction method, the mixed aid is applied, and thus the extraction ratio is high, and the pectin quality is good; the decoloring method is applied, and thus the adsorption rate is high, and the pectin loss ratio is low; in general, the method is low in pollution, high in yield and easy to popularize.

Description

technical field [0001] The invention belongs to the field of natural macromolecular compound extraction, and more particularly relates to a mixed acid, decolorization method and pectin extraction method. Background technique [0002] Pectin is mainly a polymer composed of a main chain of galacturonic acid linked by α-1,4 glycosidic bonds and a side chain formed by neutral sugars such as rhamnose, arabinose and galactose. The relative molecular mass of pectin is between 10000-400000. Pectin has good emulsifying, thickening, stabilizing and gelling effects, and has been widely used in food, textile, printing and dyeing, tobacco, metallurgy and other fields. At the same time, because pectin has antibacterial, hemostasis, detumescence, detoxification, blood lipid lowering, anti-radiation and other effects, it is also an excellent substrate for pharmaceutical preparations. In recent years, it has also been widely used in the field of medicine. [0003] Citrus peels, apple peels...

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Problems solved by technology

[0005] For the above defects or improvement needs of the prior art, the invention provides a mixed acid, a decolorization method and a pectin extraction method, the purpose of which is to reduce the amount of strong acid in the pectin acid extraction through the combination of carbonic acid and hydrochloric acid, while optimizing The decolorization method and steam explosion treatment of raw materials can improve the extraction rate of pectin and ensure the quality of pectin, thus solving the serious environmental pollution of the existing pectin acid extraction method, the low extraction rate of pectin, and the decrease of molecular weight caused by local hydrolysis and the inability to reduce the pectin. Technical Problems of Gum Esterification Degree

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