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Application method of ionic liquid dissolved starch

A technology of ionic liquid and application method, which is applied in the field of starch derivative manufacturing, can solve the problems of slow heat transfer in the production process, high cost of wastewater treatment, and small-capacity stirring of solid stirring equipment, so as to achieve the effect of reducing production cost

Pending Publication Date: 2022-07-12
LUOYANG CHANGLONG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The degree of substitution of the product obtained by this method is not high, the performance and application of the product are limited, and a large amount of waste water is generated in the production process, and the cost of waste water treatment is relatively large; The product is obtained through a medium heating reaction. Although the production process of this method is simple, there are many problems
First, there are by-products produced by the reaction in the product, which affects product performance; second, the reaction is uneven; third, the production equipment cannot meet the requirements of large-scale production, and the solid stirring equipment can only stir with a small capacity; fourth, the heat transfer in the production process is very slow The temperature is not easy to control
Both wet and dry methods are reactions on the surface of starch granules, so it is difficult to greatly improve product performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0014] Put 100 grams of BMIMCL ionic liquid into the reactor, put the reactor in an oil bath, the temperature of the oil bath is 80 ℃, add 15 grams of potato starch, turn on the stirring and temperature control mechanism, and wait until the corn starch dissolves to a transparent state. , drop 5 grams of propionic anhydride, react at this temperature for 4 hours, then cool down to 30 ° C, add 200 grams of ethanol, continue to stir for 30 minutes, move the reaction product into the sand core funnel, turn on the vacuum pump, at -0.95MPa The filtrate was filtered under the pressure, washed twice with ethanol, and the filtered product was dried and ground to obtain propionate starch, the filtrate was transferred to a rotary evaporator, and the temperature was 50 ° C, and the pressure was -0.95MPa. The ionic liquid and ethanol, the separated ionic liquid and ethanol can be reused repeatedly.

Embodiment 3

[0016] Put 100 grams of BMIMCL ionic liquid into the reactor, put the reactor in an oil bath, the temperature of the oil bath is 80 ℃, add 15 grams of wheat starch, turn on the stirring and temperature control mechanism, and wait until the corn starch dissolves to a transparent state. , drop 5 grams of vinyl acetate, react at this temperature for 4 hours, then cool down to 30 ° C, add 200 grams of ethanol, continue stirring for 30 minutes, move the reaction product into the sand core funnel, turn on the vacuum pump, at -0.95 Filter under the pressure of MPa, wash 2 times with ethanol, dry and grind the filtered product to obtain acetate starch, transfer the filtrate into a rotary evaporator, and separate at a temperature of 50 ° C and a pressure of -0.95 MPa The ionic liquid and ethanol are produced, and the separated ionic liquid and ethanol can be reused repeatedly.

Embodiment 4

[0018] Put 100 grams of BMIMCL ionic liquid into the reactor, put the reactor in an oil bath, the temperature of the oil bath is 80 ℃, add 15 grams of tapioca starch, turn on the stirring and temperature control mechanism, and wait until the corn starch dissolves to a transparent state. , drop 5 grams of acrylic acid, 2 grams of acrylamide and 0.2 grams of initiator, react at this temperature for 4 hours, then cool down to 30 ° C, add 200 grams of ethanol, continue to stir for 30 minutes, and move the reaction product into sand In the core funnel, turn on the vacuum pump, filter under the pressure of -0.95MPa, wash with ethanol twice, dry and grind the filtered product to obtain grafted starch, and transfer the filtrate into a rotary evaporator, at a temperature of 50 ° C, The ionic liquid and ethanol are separated under the pressure of -0.95MPa, and the separated ionic liquid and ethanol can be used repeatedly.

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PUM

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Abstract

The application method comprises the following steps: putting the ionic liquid into a reactor, putting the reactor into an oil bath, adding 10-15% of starch, starting a stirring and temperature control mechanism, when the starch is dissolved to be transparent, adding a monomer, reacting at the temperature for 3-5 hours, adding ethanol, continuously stirring for 20-40 minutes, transferring a reaction product into a sand core funnel, and adding a catalyst into the sand core funnel to obtain the starch-soluble ionic liquid. The preparation method comprises the following steps: adding an ionic liquid into a reaction kettle, stirring, filtering under the pressure of-0.95 MPa, washing twice with ethanol, drying and grinding the filtered product to obtain a starch derivative, transferring the filtrate into a rotary evaporator, and separating out the ionic liquid and ethanol under the conditions of the temperature of 50 DEG C and the pressure of-0.95 MPa; according to the method, the starch is fully dissolved by utilizing the solvent, the ionic liquid and the ethanol can be repeatedly utilized, the production cost is greatly reduced, the starch derivative produced by utilizing the method has flexible diversity, esterified starch, etherified starch and grafted starch can be prepared, and the performance of the starch derivative is far higher than that of a starch derivative prepared by a traditional method.

Description

technical field [0001] The invention relates to the technical field of starch derivative manufacture, in particular to an application method of ionic liquid to dissolve starch. Background technique [0002] At present, there are two methods for producing starch derivatives. One is wet method. Various reactions such as oxidation, esterification and etherification are carried out in 40% starch water emulsion, and the product is obtained by filtration, washing and drying. The degree of substitution of the product obtained by this method is not high, the performance and application of the product are limited, and a large amount of waste water is generated in the production process, and the cost of waste water treatment is relatively high; The product is obtained by heating and reacting in the middle. Although the production process of this method is simple, there are many problems. First, the product contains by-products produced by the reaction, which affects the performance o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/09C08B31/04C08F251/00C08F220/06C08F220/56C08F212/08C08L3/06C08L51/02
CPCC08J3/096C08J3/095C08B31/04C08F251/00C08J2303/06C08J2351/02C08F220/06C08F220/56C08F212/08Y02P20/54
Inventor 周永生李军锋
Owner LUOYANG CHANGLONG CHEM TECH