Method for extracting mandarin oil and hesperidin from orange peel

Abstract

The invention relates to a method for extracting mandarin oil and hesperidin from orange peel and belongs to the technical field of plant extracts. The method for extracting the mandarin oil and the hesperidin from the orange peel comprises the following steps: rolling the orange peel to obtain flake orange peel; extracting the flake orange peel by a mixed solvent of an vegetable oil extracting solvent and ethyl alcohol, adding water into an extraction solution to separate and obtain an ethyl alcohol-water layer and a vegetable oil extracting solvent layer; concentrating the vegetable oil extracting solvent, and removing solvent residues to obtain mandarin oil; concentrating the ethyl alcohol-water layer, carrying out acid precipitation and filtering to obtain a hesperidin wet crystal, and drying the hesperidin wet crystal to obtain a hesperidin product. By virtue of the method for extracting mandarin oil and hesperidin from orange peel, the orange peel is rolled, so that the loss of the mandarin oil fragrance is effectively avoided; the mandarin oil and the hesperidin are extracted by the mixed solvent; the content of the extracted effective components is greater than 90%; the hesperidin is few in impurities; the purity of the hesperidin can reach over 90%; the yield of the hesperidin can reach over 95%; the dried raw material has no influence on the content of the pectin and the production of the pectin; the raw material can be fully used.

Description

technical field [0001] The invention relates to the technical field of plant extracts, in particular to a method for extracting orange oil and hesperidin from orange peels. Background technique [0002] Citrus peel accounts for 40-50% of the whole fruit's wet weight. In recent years, China's output of citrus peel has reached about 30 million tons, and the annual citrus processing volume is about 2 million tons. It can produce about 1 million tons of citrus wet peel every year. Citrus peel is a new biological resource in foreign countries, but it has not been fully utilized in our country, resulting in a great waste of resources and pollution to the environment. If this resource is comprehensively utilized, it will turn waste into treasure, which can not only extend the industrial chain of my country's citrus industry, but also greatly improve the economic benefits of the citrus industry. In addition to water, cellulose, and lignin, citrus peels are also rich in pigments, pe...

AI Technical Summary

Problems solved by technology

However, there are many defects: the steam distillation method will cause thermal decomposition of heat-sensitive compounds and hydrolysis of easily hydrolyzed components in the essential oil due to the high operating temperature, and heat treatment will also cause the loss of essential oil aroma; the product obtained by the pressing method is impure and may There are water, chlorophyll, mucus, etc., and it is difficult to completely squeeze out the essential oil

The process of this method is long, and petroleum ether, a chemical raw material, is needed in the extraction process. Because petroleum ether is used in a large amount and is volatile, the solvent loss in the production process is large, and the economic benefit is not high.

[0008] CN201210310088.8 discloses a method for extracting hesperidin from orange peel, wherein the extraction method of orange oil and hesperidin is mentioned; One-step extraction has a greater impact on subsequent steps, more acid and alkali are used in the production process, and the obtained products such as pectin and hesperidin have low purity

Moreover, the peel absorbs a large amount of organic solvents, which will cause inconvenience to the subsequent pectin extraction.

[0009] Relevant scholars have studied the improvement of the experiment of extracting essential oils from citrus peels. In September 2004, a method for extracting essential oils from citrus peels was disclosed. Similarly, the joint extraction of citrus oils published in the journal "Biomass Chemical Engineering" Article on essential oil, pigment, pectin and hesperidin in citrus peel, January 2007, published a technology for continuous extraction of essential oil, pigment, pectin and hesperidin from citrus peel. The steps have been improved; but its fragrance is insufficient, the yield of orange oil and hesperidin is low, the impurities of hesperidin are more, and the complex process is not suitable for defects such as large-scale industrial production