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A kind of flocculant used in stevioside impurity removal process

A steviol glycoside and flocculant technology, which is applied in the preparation of sugar derivatives, sugar derivatives, sugar derivatives, etc., can solve the problems of fine floc particles, slow flocculation reaction, long cycle of flocculation reaction and press filtration clarification, etc. Achieve the effects of increasing the volume of flocs, increasing the settling speed, and shortening the production cycle

Active Publication Date: 2018-01-12
BENGBU HUADONG BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the traditional chemical impurity removal method is convenient and practical, but there are disadvantages such as slow flocculation reaction and small floc particles, and the cycle of flocculation reaction and press filtration clarification is longer

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] The present invention proposes a flocculant used in the process of removing impurities from steviol glycosides. Its raw materials in parts by weight include: 10 parts of modified chitosan, 25 parts of modified lignin, 30 parts of polymerized iron sulfate, and 35 parts of aluminum citrate. , 10 parts of magnesium sulfate, 30 parts of polyferric silicate, 3 parts of porous perlite powder, 6 parts of zeolite powder.

[0026] Among them, the preparation method of modified chitosan is as follows: adding 10 parts of carboxymethyl chitosan to 8 parts of sodium hydroxide aqueous solution with a concentration of 0.3mol / L according to parts by weight, heating to 80°C, and keeping the temperature for 1.2 hours, Drop 18 parts of 3-chloro-2-hydroxypropyltrimethylammonium chloride aqueous solution with a concentration of 0.8mol / L, then continue to keep the temperature for 1.8h, then adjust to neutral to obtain the first material; add the first material to ethanol Then, filter and dry to...

Embodiment 2

[0029] The present invention proposes a flocculant used in the process of removing impurities from steviol glycosides. Its raw materials include 12 parts by weight of modified chitosan, 23 parts of modified lignin, 33 parts of polymeric ferric sulfate, and 34 parts of aluminum citrate. , 12 parts of magnesium sulfate, 26 parts of polyferric silicate, 3.2 parts of porous perlite powder, 5.6 parts of zeolite powder.

[0030] Among them, the preparation method of modified chitosan is: adding 12 parts by weight of carboxymethyl chitosan to 5 parts of sodium hydroxide aqueous solution with a concentration of 0.6 mol / L, heating to 75° C., and keeping the temperature for 1.6 hours. Drop 15 parts of 3-chloro-2-hydroxypropyltrimethylammonium chloride aqueous solution with a concentration of 1.2mol / L, then continue to keep the temperature for 1.5h, then adjust to neutral to obtain the first material; add the first material to ethanol Then, filter and dry to obtain the second material; add ...

Embodiment 3

[0033] The present invention proposes a flocculant used in the process of removing impurities from steviol glycosides. Its raw materials include 20 parts by weight of modified chitosan, 15 parts of modified lignin, 40 parts of polymeric ferric sulfate, and 25 parts of aluminum citrate. , 15 parts of magnesium sulfate, 20 parts of polyferric silicate, 5 parts of porous perlite powder, 4 parts of zeolite powder.

[0034] Among them, the preparation method of modified chitosan is: adding 11.6 parts of carboxymethyl chitosan to 6 parts of sodium hydroxide aqueous solution with a concentration of 0.5mol / L according to parts by weight, heating to 77°C, and holding for 1.5h, Drop 16 parts of 3-chloro-2-hydroxypropyltrimethylammonium chloride aqueous solution with a concentration of 1mol / L, then continue to keep the temperature for 1.6h, then adjust to neutral to obtain the first material; add the first material to ethanol , Filtered and dried to obtain the second material; after adding ...

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Abstract

The invention discloses a flocculant used in the process of removing impurities of steviol glycosides. The raw materials include: 10-20 parts of modified chitosan, 15-25 parts of modified lignin, and 30-40 parts of polyferric sulfate , 25-35 parts of aluminum citrate, 10-15 parts of magnesium sulfate, 20-30 parts of polysilicate iron, 3-5 parts of porous perlite powder, 4-6 parts of zeolite powder; wherein the preparation method of modified chitosan For: carboxymethyl chitosan is added in aqueous sodium hydroxide solution, heat up, after insulation, dropwise add 3-chloro-2-hydroxypropyltrimethylammonium chloride aqueous solution, then continue insulation, then adjust to neutrality to obtain The first material: add the first material to ethanol, filter, and dry to obtain the second material; add the second material to distilled water and stir evenly, then heat in a water bath, then add acrylamide and initiator dropwise in sequence, and keep warm to obtain the third material ; Add the third material to acetone, filter, and dry to obtain modified chitosan.

Description

Technical field [0001] The invention relates to the technical field of flocculants, in particular to a flocculant used in a steviol glycoside impurity removal process. Background technique [0002] Refining of steviol glycosides refers to the removal of substances that are not part of steviol glycosides or high-quality glycoside components from the stevia extract through physical, chemical, biological or a combination of the three methods to obtain higher purity steviol glycosides The process or result. [0003] Steviol glycosides in the water extract of stevia account for 4-7%, and the remaining 93-96% are non-glycoside components such as water, organic and inorganic substances. Among non-glycoside components, protein accounts for 10-15%; coloring substances account for 8-12%, such as chlorophyll, lutein, lutein, and β-carotene; gum extract accounts for 7-15%, and the main gum is mucilage arabic Gum and tung tree gum; inorganic substances account for 13%, of which inorganic ions...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H15/256C07H1/06
Inventor 邢飞邢伟张志华庞正银
Owner BENGBU HUADONG BIOLOGICAL TECH
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