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Pollution-free preparation method for oxidized phosphated double-modified starch

A double-modified starch and oxidized phosphate technology, which is applied in the field of modified starch size for textile warp yarn sizing, can solve the problems of large environmental pollution, long process flow, large organic waste water, etc., and achieve strong anti-retrogradation and short process flow , the effect of reducing environmental pollution

Inactive Publication Date: 2011-10-12
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also multi-modified starches in China, but most of them use step-by-step denaturation methods and are wet production processes. Not only the process is long and the operation is complicated, but also a large amount of organic waste water is generated, which causes great environmental pollution.

Method used

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  • Pollution-free preparation method for oxidized phosphated double-modified starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix 28.5g of hydrogen peroxide with an effective content of 35% and 181.5g of water, raise the temperature to 30°C, completely dissolve 30g of sodium tripolyphosphate and 30g of urea in it to make a reaction reagent, pay attention to slow feeding, avoid tripolyphosphoric acid Sodium agglomerates in water, and finally utilizes 2mol / L hydrochloric acid solution to adjust the pH value of the reaction reagent to 7; fully mix and dry the reaction reagent, 1000 g of dry raw starch and 20 g of sodium tripolyphosphate powder to reduce the moisture content. to less than 15%, then move the material into the reaction kettle, adjust the temperature to 120°C, and react for 100 minutes; when the material is discharged and air-cooled to below 50°C, spray the reducing agent solution on the modified starch to reduce the residual hydrogen peroxide. The solution is prepared by dissolving 18.5g of sodium sulfite in 193g of water at room temperature. At this time, the solid content of the mo...

Embodiment 2

[0020] Mix 57g of hydrogen peroxide with an effective content of 35% and 163g of water, heat up to 30°C, dissolve 30g of sodium tripolyphosphate and 20g of urea in it to make a reaction reagent, pay attention to slow feeding, avoid sodium tripolyphosphate in the water Agglomerate, finally use 1mol / L hydrochloric acid solution to adjust the pH value of the reaction reagent to 8; fully mix the reaction reagent with 1000g of dry raw starch and 30g of sodium tripolyphosphate powder and dry to reduce the moisture content to 15% Then, move the material into the reaction kettle, adjust the temperature to 130°C, and react for 120 minutes; discharge the material, and when it is air-cooled to below 50°C, spray the reducing agent solution on the modified starch to reduce the residual hydrogen peroxide. The reducing agent solution consists of 37g It is prepared by dissolving sodium sulfite in 193g of water at room temperature. At this time, the solid content of modified starch is about 86%...

Embodiment 3

[0022] Mix 14.5g of hydrogen peroxide with an effective content of 35% and 190g of water, raise the temperature to 30°C, dissolve 30g of sodium tripolyphosphate and 30g of urea in it to make a reaction reagent, pay attention to slow feeding, and avoid sodium tripolyphosphate in the water Agglomerate, finally utilize the hydrochloric acid solution of 3mol / L to adjust the pH value of the reaction reagent to 7.5; Fully mix and dry the reaction reagent prepared with 1000g of dry raw starch and 30g of sodium tripolyphosphate powder to reduce the moisture content to less than 15%, then move the material into the reaction kettle, set the temperature at 120°C, and react for 100 minutes; when the material is discharged and air-cooled to below 50°C, spray the reducing agent solution on the modified starch and mix evenly to reduce the residual peroxidation Hydrogen, the reducing agent solution is prepared by dissolving 9g of sodium sulfite in 180g of water at room temperature. At this tim...

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Abstract

The invention provides a pollution-free preparation method for oxidized phosphated double-modified starch, which is characterized by comprising the following specific steps of: mixing oxydol with water, heating, and completely dissolving sodium tripolyphosphate and urea in oxydol and water to obtain a reaction reagent; sufficiently mixing the reaction reagent, dry native starch and sodium tripolyphosphate powder to obtain a mixture, and drying the mixture; and adding the dried mixture to a reaction kettle for reaction, discharging, air-drying to obtain modified starch, spraying a reducing agent solution to the modified starch, uniformly mixing, and pulverizing and screening to obtain oxidized phosphated double-modified starch slurry. The oxidized phosphated double-modified starch slurry provided by the invention has the advantages of no wastewater generation during production process, low fluctuation ratio of slurry viscosity, high sizing strength, low sizing hairiness index, strong adhesion and the like, and can greatly reduce environmental pollution, substitute for PVA at a large ratio during sizing process of cotton yarn and blended warp and lower cost.

Description

technical field [0001] The invention relates to a clean preparation method of oxidative phosphoric esterified double-modified starch size, and belongs to the technical field of modified starch size for textile warp yarn sizing. Background technique [0002] Warp sizing is a very important process in the textile processing process. Its purpose is to strengthen, maintain elongation, reduce wear and fit hairiness. Sizing directly affects weaving efficiency and weaving quality. It is vividly called "tiger's mouth" by textile workers. . [0003] Modified starch, polyvinyl alcohol, and acrylic size are the three main types of size currently used in sizing, of which modified starch and polyvinyl alcohol are used as the main size. Since polyvinyl alcohol is not easy to biodegrade, it will cause environmental damage if it is deposited in water after desizing. Therefore, less or no polyvinyl alcohol has become the development trend of the textile industry. Starch is a natural polyme...

Claims

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Application Information

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IPC IPC(8): C08B31/18C08B31/06
Inventor 黄少锋郭腊梅胡力主
Owner DONGHUA UNIV