Preparation method for cassava starch modified by combining three kinds of modification processes

A denatured cassava starch and three-component compounding technology, which is applied in the direction of starch-derived adhesives, adhesive types, polyether adhesives, etc., can solve the problems that have not been reported in public literature, and improve the permeability of paste liquid Sex and cohesiveness, improve the uniformity of reaction, reduce the effect of gelatinization temperature

Active Publication Date: 2014-09-10
广西农垦明阳生化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen from the open literature that: with tapioca native starch as raw material, epichlorohydrin as crosslinking agent, sodium hypochlorite as oxidant, maleic anhydride and acetic anhydride mixed solution as complex esterifi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In the reaction tank, adjust 1000 kg of tapioca raw starch into a starch slurry with a weight concentration of 35% with clear water, add a 3% sodium hydroxide aqueous solution to adjust the pH value of the starch slurry to 8.5, adjust the temperature of the starch slurry to 30 ° C, and activate React for 20 minutes to obtain activated starch slurry;

[0033] In the activated starch slurry, add 1 kg of epichlorohydrin, adjust the temperature of the starch slurry to 30°C, stir and react for 30 minutes, then add 10 kg of sodium hypochlorite with an available chlorine content of 15% at 30°C for 1 hour, and add The hydrochloric acid aqueous solution that is 10% by weight concentration or the sodium hydroxide aqueous solution that is 3% by weight concentration adjusts the pH value of starch slurry to 8.5, the temperature of starch slurry is reduced to 25 ℃ when the reaction is completed, and the sodium hydroxide aqueous solution that adds weight concentration is 3% Or the hyd...

Embodiment 2

[0037] In the reaction tank, adjust 1000 kg of tapioca raw starch into a starch slurry with a weight concentration of 37% with clear water, add a 5% sodium hydroxide aqueous solution to adjust the pH value of the starch slurry to 9.0, adjust the temperature of the starch slurry to 30 ° C, and activate React for 20 minutes to obtain activated starch slurry;

[0038]In the activated starch slurry, add 5 kg of epichlorohydrin, adjust the temperature of the starch slurry to 35 ° C, stir and react for 0.5 hours, and then add 200 kg of sodium hypochlorite with an available chlorine content of 10% in three times, and the three additions are 65 Kg, 65 kg, 70 kg, the time interval between each addition is 1 hour, and the total reaction time is 5 hours from the first addition of sodium hypochlorite, the reaction temperature is 35 ° C, and the reaction is simultaneously added with a sulfuric acid solution with a weight concentration of 10% or a weight concentration of 5 % sodium hydroxid...

Embodiment 3

[0042] In the reaction tank, adjust 1000 kg of tapioca raw starch into a starch slurry with a weight concentration of 40% with clear water, add a 10% sodium hydroxide aqueous solution to adjust the pH value of the starch slurry to 8.7, adjust the temperature of the starch slurry to 30 ° C, and activate React for 20 minutes to obtain activated starch slurry;

[0043] In the activated starch slurry, add 10 kg of epichlorohydrin, adjust the temperature of the starch slurry to 40 ° C, stir and react for 0.5 hours, and then add 100 kg of sodium hypochlorite with an available chlorine content of 11% in two times, and the amount added each time is 50 kg, the time interval for the second addition is 1 hour, and the total reaction time is 3 hours from the first addition of sodium hypochlorite, the reaction temperature is 40 ° C, and at the same time, add sulfuric acid aqueous solution with a weight concentration of 20% or a weight concentration of 10% Sodium hydroxide The aqueous solut...

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PUM

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Abstract

A disclosed preparation method for cassava starch modified by combining three kinds of modification processes is characterized by comprising: taking starch as a raw material, employing a wet-process crosslinking-oxidation-esterification chemical modification technological route, specifically, performing a crosslinking reaction and an oxidation reaction on an active starch slurry at the same time, then adding a pretreated composite esterification reagent to perform esterification reaction, and adjusting the pH value of the starch slurry to 5.0-6.5, so as to finish combined modification of cassava starch, filtering to obtain wet starch with the water content of 35% or less, then adding polyethylene glycol, mixing uniformly, and performing drying, cooling, crushing and sieving, so as to obtain the cassava starch modified by combining three kinds of modification processes. Only one time of post-processing process comprising washing, centrifugation, drying and the like is performed, the technological process is continuous and automatic, energy and reaction time are saved; and the product is low in gelatinization temperature, good in formability, improved in permeability, caking property, film forming ability and anti-ageing property, and is suitable for being used as a coating adhesive and a surface sizing agent in papermaking industry, a sizing agent in weaving industry, an industrial binder and the like.

Description

technical field [0001] The invention belongs to the technical field of modified starch, and relates to a preparation method of ternary compound modified tapioca starch which is combined to prepare cassava modified starch in a cross-linking-oxidation-esterification manner. Background technique [0002] With the development of food, textiles, papermaking or daily industrial products, my country has realized the industrial production of modified starch since the 1980s, and its products are basically once-modified starch products, such as oxidized starch, acid-thinned starch, acetic acid Ester starch, phosphate ester starch, cross-linked starch, carboxymethyl starch, cationic starch, pregelatinized starch, etc. However, single modified starch products cannot meet the performance requirements in some industries or when making some high-end products. For example: high-grade food, paper or textiles, etc. Composite modified starch refers to the starch in which two or more reactive ...

Claims

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Application Information

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IPC IPC(8): C08L3/10C08L3/06C08L71/08C08B31/00C08B31/18C08B31/04D21H19/24D06M15/11D06M15/53C09J103/10C09J103/06C09J171/08
Inventor 李权书冯琳潘瑞坚朱其虎玉琼广甘振登梁著棋朱彩丽黄家满刘群艳马丽梅
Owner 广西农垦明阳生化有限公司
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