Flocculating agent for impurity removal process of steviol glycosides

A technology of steviol glycosides and flocculants, applied in the preparation of sugar derivatives, sugar derivatives, sugar derivatives, etc., can solve the problems of slow flocculation reaction, small floc particles, long period of flocculation reaction and filter press clarification, etc. Achieve the effect of increasing the volume of flocs, shortening the production cycle and improving efficiency

Active Publication Date: 2015-11-11
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

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of flocculant used in the stevioside impurity removal process proposed by the present invention, its raw material comprises by weight: 10 parts of modified chitosan, 25 parts of modified lignin, 30 parts of polyferric sulfate, 35 parts of aluminum citrate , 10 parts of magnesium sulfate, 30 parts of polysilicate iron, 3 parts of porous perlite powder, 6 parts of zeolite powder.

[0026] Wherein, the preparation method of modified chitosan is as follows: add 10 parts of carboxymethyl chitosan into 8 parts of sodium hydroxide aqueous solution with a concentration of 0.3mol / L by weight, raise the temperature to 80°C, and keep it warm for 1.2h. Add dropwise 18 parts of 3-chloro-2-hydroxypropyltrimethylammonium chloride aqueous solution with a concentration of 0.8mol / L, then continue to keep warm for 1.8h, and then adjust to neutral to obtain the first material; add the first material to ethanol medium, filtered, and dried to obtain the second material; add the second...

Embodiment 2

[0029] A kind of flocculant used in the stevioside impurity removal process proposed by the present invention, its raw material comprises by weight: 12 parts of modified chitosan, 23 parts of modified lignin, 33 parts of polyferric sulfate, 34 parts of aluminum citrate , 12 parts of magnesium sulfate, 26 parts of polysilicate iron, 3.2 parts of porous perlite powder, 5.6 parts of zeolite powder.

[0030] Wherein, the preparation method of modified chitosan is as follows: add 12 parts of carboxymethyl chitosan into 5 parts of sodium hydroxide aqueous solution whose concentration is 0.6mol / L by weight, raise the temperature to 75°C, and keep it warm for 1.6h, Add dropwise 15 parts of 3-chloro-2-hydroxypropyltrimethylammonium chloride aqueous solution with a concentration of 1.2mol / L, then continue to keep warm for 1.5h, and then adjust to neutral to obtain the first material; add the first material to ethanol , filtered, and dried to obtain the second material; add the second ma...

Embodiment 3

[0033] A kind of flocculant used in the stevioside impurity removal process proposed by the present invention, its raw material comprises by weight: 20 parts of modified chitosan, 15 parts of modified lignin, 40 parts of polyferric sulfate, 25 parts of aluminum citrate , 15 parts of magnesium sulfate, 20 parts of polysilicate iron, 5 parts of porous perlite powder, 4 parts of zeolite powder.

[0034] Wherein, the preparation method of the modified chitosan is: adding 11.6 parts of carboxymethyl chitosan by weight to 6 parts of sodium hydroxide aqueous solution with a concentration of 0.5 mol / L, raising the temperature to 77 ° C, and keeping the temperature for 1.5 h, Add dropwise 16 parts of 3-chloro-2-hydroxypropyltrimethylammonium chloride aqueous solution with a concentration of 1mol / L, then continue to keep warm for 1.6h, and then adjust to neutral to obtain the first material; add the first material to ethanol , filtered, and dried to obtain the second material; add the s...

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PUM

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Abstract

The invention discloses a flocculating agent for an impurity removal process of steviol glycosides. The flocculating agent comprises, by weight, 10-20 parts of modified chitosan, 15-25 parts of modified lignin, 30-40 parts of polymeric ferric sulfate, 25-35 parts of aluminium citrate, 10-15 parts of magnesium sulfate, 20-30 parts of polymeric ferric silicate-sulfate, 3-5 parts of porous pearlite powder and 4-6 parts of zeolite powder. A preparation method of the modified chitosan comprises the steps that carboxymethyl chitosan is added into a sodium hydroxide aqueous solution, after heating and heat preservation are conducted, a 3-chloro-2-hydroxypropyltrimethylammonium chloride aqueous solution is dropwise added, the heat preservation is continuously conducted, and then the mixture is adjusted to be neutral to obtain a first material; the first first material is added into ethyl alcohol, filtration is conducted, and a second material is obtained after drying; the second material is added into distilled water to be evenly stirred, water-bath heating is conducted, acrylamide and an initiating agent are sequentially and dropwise added, and a third material is obtained after the heat preservation is conducted; the third material is added into acetone, the filtration is conducted, and the modified chitosan is obtained after drying is conducted.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(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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