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Decolorization method of levulinic acid

A levulinic acid and decolorization technology, applied in the direction of organic chemical methods, chemical instruments and methods, carboxylate preparation, etc., can solve problems such as weak aroma quality, poor color quality of liquid levulinic acid, and affecting the quality of levulinic acid , to achieve the effect of convenient and simple operation and improving the quality of aroma

Active Publication Date: 2021-05-14
浦杰香料(上海)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defects of poor chroma quality and weak aroma quality of liquid levulinic acid prepared at high ambient temperature in the prior art, the invention provides a decolorization method of levulinic acid
When using the activated carbon decolorization method, the change of the color of colored levulinic acid is almost negligible; when using the oxidant decolorization method, the color of colored levulinic acid becomes colorless. New impurities are produced in levulinic acid, seriously affecting the quality of levulinic acid

Method used

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  • Decolorization method of levulinic acid
  • Decolorization method of levulinic acid
  • Decolorization method of levulinic acid

Examples

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Effect test

Embodiment 1

[0023] The experimental location of this example is located at 121° east longitude and 31° north latitude, and the experiment date is from July 20, 2020 to July 25, 2020. Use an illuminance meter to measure the day's light intensity, and calculate the day's sunshine according to the light intensity measured every hour Average light intensity over time. The volume of the levulinic acid used is 20L, and it is placed in a 25L colorless transparent glass container. When there is no light on the day, store the levulinic acid in the warehouse. The experimental results are shown in Table 1 and figure 1 shown.

[0024] Table 1 The color change of levulinic acid under sunlight

[0025]

[0026]

[0027] From Table 1 and figure 1 It can be seen that under the sunlight of the light intensity for 6 days, the originally red liquid levulinic acid can be turned into a very light light yellow color, basically completely decolorized. After reaching a sample color of 6, the liquid le...

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Abstract

The invention discloses a decolorization method of levulinic acid. The decolorization method comprises the steps: placing colored liquid-state levulinic acid under sunlight until the colored liquid-state levulinic acid is colorless, wherein the illumination intensity of the sunlight is 5.6*10<4>-10*10<4> lx. When the decolorization method provided by the invention is used for decolorizing the liquid levulinic acid, the color of the colored liquid levulinic acid is colorless, the aroma quality of the liquid levulinic acid is improved, and purer levulinic acid without offensive odor is obtained; and moreover, the decolorization method is convenient and simple to operate, economical and environment-friendly.

Description

technical field [0001] The invention relates to the field of spice processing, in particular to a method for decolorizing levulinic acid. Background technique [0002] Levulinic acid, the pure product is a colorless crystal, with a melting point of 37.2°C. It is also known as penterone acid, levulinic acid, and fructose acid. It is one of the important products produced by hydrolysis. In the fragrance industry, levulinic acid can be used as a raw material for fragrances and has a wide range of uses. Levulinic acid can be prepared by hydrolysis, such as biomass direct hydrolysis, that is, levulinic acid is produced from cottonseed hulls or corncobs after furfural production (furfural residue) or waste potato residue is hydrolyzed under pressure with dilute acid ; Or prepared by catalytic hydrolysis of furfuryl alcohol, which is prepared by rearrangement and hydrolysis of furfuryl alcohol. The raw materials of the above-mentioned preparation method are easy to obtain, the co...

Claims

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Application Information

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IPC IPC(8): C07C51/487C07C59/185C11B9/00
CPCC07C51/487C11B9/0015C07B2200/13C07C59/185
Inventor 姚婉平
Owner 浦杰香料(上海)有限公司