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A kind of mother liquor sugar circulation purification and the preparation method of extracting ra and st

A technology of mother liquor and filtrate, which is applied in the preparation of sugar derivatives, chemical instruments and methods, sugar derivatives, etc., can solve the problems of underutilization and waste of resources, and achieve the effect of improving production efficiency and profits and avoiding waste of resources

Active Publication Date: 2020-04-28
JIANGSU STEVEN BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mother liquid sugar processed by this scheme only increases the total glycosides, which is not fully utilized, resulting in a waste of resources

Method used

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  • A kind of mother liquor sugar circulation purification and the preparation method of extracting ra and st
  • A kind of mother liquor sugar circulation purification and the preparation method of extracting ra and st
  • A kind of mother liquor sugar circulation purification and the preparation method of extracting ra and st

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preparation example Construction

[0031] The embodiment of the present invention provides a preparation method for circularly purifying mother liquor sugar and extracting RA and ST. First, the mother liquor sugar with low total glucoside content is purified into mother liquor sugar with a total glucoside content higher than 70% through step S4, and then sequentially Follow the steps below:

[0032] Step S1, mix the mother liquor sugar with a total glucoside content of more than 70% with the first solvent, add every 1kg mother liquor sugar to 1-10L of the first solvent, heat to 60-80°C, and stir to make the mother liquor sugar and the first solvent Dissolve, cool and crystallize, let stand for 12-24h, centrifuge to obtain the first filter cake and the first filtrate, dry the first filter cake, concentrate and spray the first filtrate to dry, weigh the dried first filter cake respectively And the first filtrate after spraying dry, detect respective RA content, ST content, total glucoside (SG) content, and calcul...

Embodiment 1

[0054] 1. Weigh 2 kg of mother liquor sugar with a total glucoside content higher than 70%, add methanol, ethanol, n-butane, and water to form the first solvent 2.6L, wherein methanol: ethanol: n-butane: water = 8.5: 1: 0.3:0.2, heat and stir at 60°C to dissolve, cool to crystallize, stand still for 12 hours, and centrifuge to obtain the first filter cake and the first filtrate. The first filter cake is dried, and the first filtrate is concentrated and spray-dried.

[0055] 2. Weigh 1 kg of the dried first filter cake, add 6 L of the second solvent formed by ethanol, n-butane, and water, wherein ethanol: n-butane: water = 9:5:0.5, stir and reflux at 50°C 1.5h, after cooling to room temperature, centrifuge and filter to obtain the second filter cake and the second filtrate, the second filter cake is dried, and the second filtrate is concentrated and sprayed to dryness.

[0056] 3. Weigh 1 kg of the second filtrate after spraying and add 5.2 L of the third solvent formed by meth...

Embodiment 2

[0063] 1. Weigh 2 kg of mother liquor sugar with a total glucoside content higher than 70%, add methanol, ethanol, n-butane, and water to form the first solvent 3.5L, wherein methanol: ethanol: n-butane: water = 8: 1.5: 0.3:0.2, heat and stir at 70°C to dissolve, cool to crystallize, stand still for 24 hours, and centrifuge to obtain the first filter cake and the first filtrate. The first filter cake is dried, and the first filtrate is concentrated and spray-dried.

[0064] 2. Weigh 1kg of the dried first filter cake, add 10L of the second solvent formed by ethanol, n-butane, and water, wherein ethanol:n-butane:water=8.2:1:3, stir and reflux at 50°C After cooling to room temperature for 3 hours, centrifuge and filter to obtain a second filter cake and a second filtrate. The second filter cake is dried, and the second filtrate is concentrated and sprayed to dryness.

[0065] 3. Weigh 1 kg of the second filtrate after spraying and add 4 L of the third solvent formed by methanol,...

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Abstract

Disclosed is a preparation method for cyclic purification of mother liquor sugar and extraction of renaudiside (RA) and stevioside (ST), comprising heating and stirring a mother liquor sugar comprising more than 70% of total glycosides with a first solvent to dissolve the mother liquor sugar, cooling and standing the resulting mixture to allow crystallization, followed by centrifugal filtration to obtain a first filter cake and a first filtrate, with the first filter cake being bake-dried and the first filtrate being spray-dried; heating and stirring the first filter cake with a second solvent under reflux, cooling the resulting mixture to room temperature, followed by centrifugal filtration to obtain a second filter cake and a second filtrate, with the second filter cake being bake dried and the second filtrate being spray dried, and the second filter cake being RA; stirring the second filtrate with a third solvent at room temperature to obtain a clear solution, followed by stirring, standing, and centrifugal filtration to obtain a third filter cake and a third filtrate, with the third filter cake being bake dried and the third filtrate being spray dried, and the third filter cake being ST; and mixing the first filtrate and the third filtrate evenly to obtain a mother liquor sugar comprising less than 70% of total glycosides, which is prepared into a sugar solution to be subjected to separation and enrichment by means of chromatography. The mother liquor sugar comprising less than 70% total glycosides is recycled to increase total glycosides therein and extract RA and ST therefrom.

Description

technical field [0001] The invention relates to the technical field of sweeteners, in particular to a preparation method for circularly purifying mother liquid sugar and extracting RA and ST. Background technique [0002] Stevioside is the extract of Stevia rebaudiana leaves, which is free of sugar and calories, and is known as "the third sugar source in the world". Stevia sugar is white to slightly yellow in color, suitable in taste, and has no peculiar smell. It is a sweetener discovered in the world and approved by the Ministry of Health of my country. Its natural low calorie value is very close to the taste of sucrose. Stevioside is the third natural sweetener that has development value and health praise after sugarcane and beet sugar, and it is a new sugar source with broad development prospects. [0003] Stevioside (commonly known as stevioside, stevioside) is a new type of natural sweetener extracted from the Compositae herb stevia (or stevia leaf). Foreign research...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H15/256C07H1/06
CPCC07H1/06C07H15/256
Inventor 周爱兵王宇杨圆
Owner JIANGSU STEVEN BIOTECHNOLOGY CO LTD