Efficient process for producing stevioside

Abstract

The invention discloses an efficient process for producing stevioside, and belongs to the technical field of extraction of natural products. The process comprises the following steps of: (1) taking fresh leaves of stevia rebaudiana, grinding the fresh leaves of stevia rebaudiana into paste, and adding water into the paste for extraction to obtain an extract; (2) adding a flocculating agent into the extract, regulating the pH value to be alkaline, performing stirring for flocculation, and conducting filtration to obtain a filtrate; (3) performing adsorption on the filtrate by using macroporousadsorption resin, conducting desorption by using an alcohol solution to obtain a first desorption solution; (4) performing concentration on the first desorption solution, performing desalting and decolorization by enabling the concentrated first desorption solution to pass through cation exchange resin and anion exchange resin, and performing desorption to obtain a second desorption solution; and(5) performing concentration on the second desorption solution, and performing spray drying on the concentrated second desorption solution to obtain the stevioside product. According to the efficientprocess for producing stevioside, since the fresh leaves of stevia rebaudiana are adopted as a raw material, the loss of the content of stevioside during air drying can be reduced, and meanwhile introduction of impurities can be minimized; besides, the obtained product has high content of stevioside, high yield and good quality.

Description

technical field [0001] The invention belongs to the technical field of natural product extraction, and in particular relates to a high-efficiency production process of stevioside. Background technique [0002] Stevioside (glycoside) is a new type of natural sweetener extracted and refined from the herb Stevia rebaudiana of Compositae. It has the characteristics of high sweetness and low calorie. Sweetener, known internationally as "the third sugar source in the world", is widely used in food, beverage and other industries. [0003] The patent application with the application number CN201210336408 discloses a method of extracting and purifying steviol glycosides from stevia rebaudiana water extract by a series resin column method. Stevia rebaudiana water extract is obtained; the patent application with the application number WO2011113373A1 discloses an ultrasonic extraction method using crushed stevia rebaudiana dry leaves as a raw material. These methods all use stevia dry...

AI Technical Summary

Problems solved by technology

During the drying process of stevia in the natural environment, it is very easy to mix a large amount of impurities such as branches, soil, sand and stones, packaging materials, etc., so that the extract contains a large amount of impurities, which increases the difficulty of subsequent purification treatment and results in the content of stevioside. Large loss, frequent resin regeneration, large amount of sewage treatment, unqualified product quality indicators, etc.