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Method for extracting stevioside from fresh stevia rebaudiana leaves

A technology of stevia leaves and steviol glycosides, which is applied in the field of stevioside extraction, can solve the problems of large water consumption for soaking and extraction, increased production costs, and large water discharge, so as to save time and procedures, save time, and reduce The effect of efflux

Inactive Publication Date: 2011-07-20
LIAONING QIANQIAN BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The drying of fresh stevia leaves is labor-intensive and time-consuming, and the water consumption for soaking and extraction is large, resulting in a large amount of water discharge and increasing production costs

Method used

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  • Method for extracting stevioside from fresh stevia rebaudiana leaves
  • Method for extracting stevioside from fresh stevia rebaudiana leaves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take 60kg of fresh stevia leaves, and homogeneously crush the fresh stevia leaves with 5 times the volume of water with homogeneous crushing equipment to obtain 360kg of stevia crushed slurry.

[0039] Pump the crushed fresh stevia leaf slurry into the continuous automatic unloading filter equipment for pressure filtration, add 8 times the volume of water to the filtered fresh leaf filter residue, and carry out the first extraction under ultrasonic and stirring. 30 minutes, then pour into the continuous automatic unloading filter equipment to filter, obtain the extract of 480kg. Add 8 times the volume of water to the filter residue for the second extraction under ultrasonic and stirring, and then filter with continuous automatic unloading filter equipment, and the second filtrate is used as water for homogeneous crushing.

[0040] Combine the homogeneously crushed filtrate and the filtrate extracted once, and add 0.25% of FeSO by weight of the combined filtrate under st...

Embodiment 2

[0046] Get 60kg of stevia fresh leaves, and homogeneously crush the fresh stevia leaves together with 10 times the volume of water with homogeneous crushing equipment. Obtained 660 kg of stevia crushed slurry.

[0047]Pump the crushed fresh stevia leaf slurry into the continuous automatic unloading filter equipment for press filtration, add 10 times the volume of water to the filtered fresh leaf filter residue, and carry out the first extraction under ultrasonic and stirring. 30 minutes. Squeeze into continuous automatic unloading filtration equipment then and filter, obtain the extract of 600kg. Add 10 times the volume of water to the filter residue for a second extraction under ultrasonic and stirring, and then filter with continuous automatic unloading filter equipment, and use the filtrate obtained from the second filter as water for homogeneous crushing.

[0048] Combine the homogeneously crushed filtrate and the filtrate extracted once, and add 0.25% of FeSO by weight ...

Embodiment 3

[0053] Get 60kg of stevia fresh leaves, and use homogeneous crushing equipment to carry out homogeneous crushing of the fresh stevia leaves together with 15 times the volume of water. Obtain 960kg of stevia fresh leaf slurry.

[0054] Pump the crushed fresh stevia leaf slurry into the continuous automatic unloading filter equipment for pressure filtration, add 15 times the volume of water to the filtered fresh leaf filter residue, and carry out the first extraction under ultrasonic and stirring. 30 minutes. Squeeze into continuous automatic unloading filter equipment then and filter, obtain the extract of 900kg. Add 10 times the volume of water to the filter residue for the second extraction under ultrasonic and stirring, and then filter with continuous automatic unloading filter equipment, and the filtrate after the second filter is used as water for homogeneous crushing.

[0055] Combine the homogeneously crushed filtrate and the filtrate extracted for the first time, and ...

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Abstract

The invention discloses a method for extracting stevioside from fresh stevia rebaudiana leaves, which comprises: crushing fresh stevia rebaudiana leaves with homogenizing crushing equipment under a condition of water, performing pressure filtration in continuous automatic discharge filtering equipment, subjecting the filtrate to flocculation by mixed flocculating agent; and absorbing by resin, analyzing, desalting and decolorizing by resin, concentrating and spray drying to obtain the stevioside product. In the invention, time and working procedures are saved, a long-distance transport process is avoided, raw material cost is lowered, discharge of waste water is reduced greatly, and clean production can be realized basically.

Description

technical field [0001] The invention belongs to the technical field of stevioside extraction, and in particular relates to a method for extracting stevioside using fresh stevia leaves as raw materials. Background technique [0002] Stevia (stevia rebaudiana) is a plant of the genus Stevia in the Compositae family. Stevioside, commonly known as stevioside (Stevioside), is a new type of natural sweetener extracted from the herb Stevia rebaudiana of the Compositae family. Stevia is native to Paraguay, Brazil, Argentina and other places in South America. my country's stevia was successfully introduced and cultivated from Japan in 1976, and stevioside was extracted in 1979. Stevioside is a kind of glycoside mixture composed of steviol, a tetracyclic diterpene compound, linked with different numbers of glycosides. At present, 12 kinds of substances have been found in the research, and eight kinds of substances have been recognized and have been tested in medical toxicology, spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H15/256C07H1/08
Inventor 郭玉孝孟庆华
Owner LIAONING QIANQIAN BIOLOGICAL TECH
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