Preparation method of oxidized starch

A technology for oxidizing starch and starch, which is applied in the direction of starch-derived adhesives, adhesive types, and water-repellent additions. Low gelatinization temperature and good film-forming performance

Inactive Publication Date: 2012-05-09
NANTONG XIYUN TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxidants used to oxidize starch mainly include hypochlorite, periodic acid, peroxide, etc. In industry, sodium hypochlorite and hydrogen peroxide are often used as oxidants in considerat...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 2 parts of dilute sodium hydroxide solution with a pH value of 10 to one part of coarse starch, under continuous stirring, evenly soak for 1 hour, then filter with a 100-mesh sieve, remove the filter residue, and separate the obtained starch milk after standing overnight Remove waste water; add 100 grams of starch and 130 milliliters of water in a reaction pot with a stirrer, add 11 grams of sulfuric acid and 60 grams of potassium permanganate under constant slow stirring, fully stir, and now the starch milk is brown. Then place it for 20 hours to carry out the oxidation reaction, stir twice during this period, and stir for 15 minutes each time until the starch milk turns into pure white; after the oxidation finishes, add 36 milliliters of sodium hydroxide solution and 130 milliliters of water under constant stirring, The starch gradually swells and gelatinizes during the stirring process. Stir for 10 minutes until the starch milk has a certain degree of transparency...

Embodiment 2

[0016] Add 2 parts of dilute sodium hydroxide solution with a pH value of 10 to one part of coarse starch, under continuous stirring, evenly soak for 1 hour, then filter with a 100-mesh sieve, remove the filter residue, and separate the obtained starch milk after standing overnight Remove waste water; add 110 parts of starch and 1140 milliliters of water in a reaction pot with agitator, add 12 grams of sulfuric acid and 70 grams of potassium permanganate under continuous slow stirring, fully stir, and now the starch milk is brown. Then place it for 24 hours to carry out the oxidation reaction, stir twice during this period, stir for 20 minutes each time, until the starch milk turns into pure white; after the oxidation finishes, add 40 milliliters of sodium hydroxide solution and 140 milliliters of water under constant stirring, The starch gradually swells and gelatinizes during the stirring process. Stir for 15 minutes until the starch milk has a certain degree of transparency ...

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PUM

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Abstract

The invention discloses a preparation method of oxidized starch. Corn starch, sulfuric acid, sodium hydroxide, potassium permanganate and sodium borate are used as main raw materials, and the oxidized starch is prepared via crude starch pretreatment, oxidation, pasting and complexation. The mass parts of the raw materials of the oxidized starch are: 100-110 parts of the corn starch, 11-12 parts of the sulfuric acid, 60-70 parts of the potassium permanganate, 36-40 parts of the sodium hydroxide, 95-105 parts of the sodium borate and 260-280 parts of water. The potassium permanganate is used as an oxidant, and the prepared oxidized starch has the advantages of low gelatinization temperature, good fluidity, white color and good film-forming performance.

Description

technical field [0001] The invention relates to a modified starch, in particular to a preparation method of oxidized starch. Background technique [0002] Oxidized starch refers to a series of modified starches formed after treatment with various oxidants, and is a thickener with low viscosity and high concentration. The oxidants used to oxidize starch mainly include hypochlorite, periodic acid, peroxide, etc. In industry, sodium hypochlorite and hydrogen peroxide are often used as oxidants in consideration of production costs. Although these two oxidants save production costs, they are oxidized. The degree of oxidized starch is not easy to control, and the oxidized starch made is difficult to store for a long time. Contents of the invention [0003] Purpose of the invention: In order to solve the deficiencies of the prior art, the present invention provides an oxidized starch with low gelatinization temperature, white color and good fluidity. [0004] The technical sche...

Claims

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Application Information

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IPC IPC(8): C08B31/18C09J103/10D21H17/28D21H21/16D06M15/11
Inventor 孔玲
Owner NANTONG XIYUN TRADE
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