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Preparation method for hydrophobic starch calcium

A hydrophobic and modified starch technology, which is applied in the field of starch deep processing, can solve the problems that the original hydrophobic starch cannot meet the fluidity and hydrophobicity requirements, and achieve the effects of good fluidity, good hydrophobicity, and good safety

Active Publication Date: 2017-06-20
ZHEJIANG MEDICINE CO LTD XINCHANG PHAMACEUTICAL FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the good fluidity and hydrophobicity of hydrophobic starch, it is widely used in skin care products such as adsorbents in cold spray products and talcum powder prickly heat powder, while other existing modified starches cannot achieve the fluidity and hydrophobicity of original hydrophobic starch. Hydrophobic requirements, so the inventor produced hydrophobic starch calcium through a large number of experiments, its fluidity and hydrophobicity can be compared with the original hydrophobic starch, because it is starch calcium, its safety is similar to starch sodium, and can be used as food Additives and added to skin care products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Put 100 parts of cornstarch and 233 parts of purified water into a four-neck flask and stir evenly at a stirring speed of 100rpm, place in a constant temperature water bath at 25°C, add 1wt.% sodium hydroxide solution dropwise to bring the pH of the emulsion to 8.0, and add 1 part Acetic anhydride, continuously drop 1wt.% sodium hydroxide solution to keep the pH value of the emulsion at 7.0-9.5. After the pH value of the system is stable, add 1 part of calcium chloride, continue the reaction for 3 hours, add 1wt.% hydrochloric acid to adjust the pH value of the emulsion Add 300 parts of purified water to 6.0, stir evenly, pass through a 500-mesh filter cloth to obtain a filter cake, put the filter cake in an oven at 50°C to dry, and crush it through a 120-mesh sieve to obtain white hydrophobic starch calcium. The measured activation index H=20.32%, angle of repose=29.407°.

Embodiment 2

[0016] Put 100 parts of tapioca starch and 233 parts of purified water into a four-necked flask and stir evenly at a stirring speed of 150rpm, place in a constant temperature water bath at 27°C, add 2wt.% sodium hydroxide solution dropwise to make the pH of the emulsion to 8.5, add 3 parts Allyl succinic anhydride, continuously drop 2wt.% sodium hydroxide solution to keep the pH value of the emulsion at 7.0-8.5, after the pH value of the system is stable, add 3 parts of calcium phosphate, continue to react for 4 hours, add 5wt.% hydrochloric acid to adjust the emulsion The pH value is 6.0, add 400 parts of purified water, stir evenly, pass through a 500-mesh filter cloth to obtain a filter cake, put the filter cake in an oven at 50°C for drying, and crush it through a 120-mesh sieve to obtain white hydrophobic starch calcium. The measured activation index H=21.85%, angle of repose=27.523°.

Embodiment 3

[0018] 100 parts of potato starch and 200 parts of purified water were put into a four-neck flask and stirred evenly at a stirring speed of 200rpm, placed in a constant temperature water bath at 29°C, 3wt.% calcium lactate solution was added dropwise to make the pH of the emulsion to 7.5, and 5 parts of octane Alkenyl succinic anhydride, continuously drop 3wt.% calcium lactate solution to keep the pH value of the emulsion at 7.0-8.5. After the pH value of the system is stable, add 5 parts of calcium chloride and continue the reaction for 5 hours. Add 8wt.% hydrochloric acid to adjust the pH value of the emulsion When the value is 6.0, add 500 parts of purified water, stir evenly, pass through a 500-mesh filter cloth to obtain a filter cake, put the filter cake in an oven at 50°C to dry, crush and pass through a 120-mesh sieve to obtain white hydrophobic starch calcium. The measured activation index H=52.36%, angle of repose=24.336°.

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Abstract

The invention provides a preparation method for hydrophobic starch calcium; the preparation method comprises the following steps: 1) carrying out constant temperature stirring of native starch, modified starch or starch derivatives and water at a 25 DEG C-40 DEG C reaction system to form a 30-40 wt.% starch emulsion; 2) in the 25 DEG C-40 DEG C reaction system, adjusting the pH value of the emulsion to 7.5-8.5 with an alkaline solution; 3) in the 25 DEG C-40 DEG C reaction system, adding anhydride; and constantly adding an alkaline solution or a calcium salt to maintain the pH value of the emulsion at 7.5-8.5, and continuing to carry out a reaction for a certain time; 4) in the 25 DEG C-40 DEG C reaction system, adding an acid to adjust the pH value to 6.0; and 5) adding water, washing and filtering, drying at the temperature of 50 DEG C, crushing, and sieving to obtain white hydrophobic starch calcium. The hydrophobic starch calcium product belongs to adsorbent modified starch, has the advantages of good fluidity, good hydrophobicity and good safety, is an excellent adsorbent, and can be widely applied in cold spray products, such as adsorbents, talcum powders, prickly-heat powders and other skin-care products.

Description

technical field [0001] The invention belongs to the technical field of starch deep processing, in particular to a preparation method of hydrophobic starch calcium. Background technique [0002] As we all know, the original hydrophobic starch refers to aluminum starch octenyl succinate, which has been deleted from the allowed varieties of food additives according to GB2760-2014 "National Food Safety Standard Food Additive Use Standard". Due to the good fluidity and hydrophobicity of hydrophobic starch, it is widely used in skin care products such as adsorbents in cold spray products and talcum powder prickly heat powder, while other existing modified starches cannot achieve the fluidity and hydrophobicity of original hydrophobic starch. Hydrophobic requirements, so the inventor produced hydrophobic starch calcium through a large number of experiments, its fluidity and hydrophobicity can be compared with the original hydrophobic starch, because it is starch calcium, its safety...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/04C08B31/06
CPCC08B31/04C08B31/066
Inventor 张载尧陈增
Owner ZHEJIANG MEDICINE CO LTD XINCHANG PHAMACEUTICAL FACTORY
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