Method for decolorizing sugar solution

A technology of sugar solution and cellulose solution, which is applied in the production of sugar, purification of sugar juice, chemical instruments and methods, etc. It can solve the problems of high consumption, limited cellulose dissolving ability, and no reported cellulose membrane pigment separation ability. , to achieve the effect of strong adaptability, easy control of decolorization rate and easy thickness

Active Publication Date: 2019-04-30
澳泰(广东)生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has limited ability to dissolve cellulose, the mass fraction of cellulose in the solution is less than or equal to 7%, and it needs to consume a large amount of sodium hydroxide and urea to dissolve a small amount of cellulose
In addition, this patent does not report the ability of the cellulose membrane to separate the pigment in the sugar solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Mix 1.6 grams of microcrystalline cellulose with 1 gram of sodium hydroxide, 1 gram of urea, and 8 grams of water at room temperature, stir thoroughly to form a solid-liquid mixture; cool the solid-liquid mixture from room temperature to 20 ℃ at a rate of 1 °C per minute. Lower the temperature to -18°C to obtain a translucent, viscous cellulose solution; spread the cellulose solution on a clean 6cm×6cm glass sheet by coating method, add 10 grams of normal temperature water, and cure for 12 hours to form fibers plain film; fully wash the cellulose film with pure water until the pH of the washing wastewater reaches the range of 7 to 9; remove the film and fix it with a supporting device; prepare a raw sugar aqueous solution with a mass fraction of 20%, take 4 ml For this solution, the pH of the sample is adjusted to 7.0, and the absorbance at 420 nm is 0.451; the raw sugar solution is passed through the above-mentioned cellulose membrane at a flow rate of 1 milliliter per ...

Embodiment 2

[0029] Mix 13 grams of microcrystalline cellulose with 15 grams of sodium hydroxide, 15 grams of urea, and 60 grams of water at room temperature, and stir thoroughly to form a solid-liquid mixture; the solid-liquid mixture is cooled from room temperature to 20 degrees Celsius at a rate of 0.7 ° C per minute. The temperature is lowered to -20°C, and a translucent and viscous cellulose solution is obtained; the cellulose solution is spread on a stainless steel mesh with a diameter of 10 cm and a pore size of 200 mesh by coating method, and 100 grams of normal temperature mass fraction of 70% The ethanol aqueous solution is solidified for 12 hours to form a cellulose film; the cellulose film is fully washed with pure water until the pH of the washing wastewater reaches the range of 7 to 9; the film is peeled off and fixed with a supporting device; the mass fraction is prepared It is 15% brown sugar aqueous solution, get 4 milliliters of this solution, sample pH is adjusted to 7.0,...

Embodiment 3

[0031] Mix 7.2 grams of microcrystalline cellulose with 5 grams of sodium hydroxide, 14 grams of urea, and 70 grams of water at room temperature, and stir fully to form a solid-liquid mixture; the solid-liquid mixture is cooled by 1 ° C per minute from room temperature to 20 ℃ was lowered to -18 ℃ to obtain a translucent, viscous cellulose solution; the cellulose solution was spread onto a stainless steel sheet with a diameter of 5 cm by casting method, and 40 grams of acetone aqueous solution with a mass fraction of 60% at room temperature was added. The curing lasts for 8 hours to form a cellulose film; the cellulose film is fully washed with pure water until the pH of the washing wastewater reaches the range of 7 to 9; the film is peeled off and fixed with a supporting device; the mass fraction of 30% is prepared Maltose aqueous solution, take 4 ml of this solution, adjust the pH of the sample to 7.0, and measure the absorbance at 420 nm to be 0.467; use a delivery pump to p...

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Abstract

The invention relates to a method for decolorizing a sugar solution. The method comprises the following steps: dissolving a large amount of celluloses into an aqueous solution of urea and sodium hydroxide in a slow cooling manner, precipitating the celluloses in order to prepare a cellulose membrane, and using the membrane as a filtering medium to separate pigments in the sugar solution in order to obtain a decolorized sugar solution. Raw materials used in the method are all cheap and nontoxic; and the method significantly reduces the use amounts of sodium hydroxide, urea and water required for dissolving celluloses, allows the concentration of the cellulose solution to be far higher than that in the prior art, allows the decolorizing rate of raw sugar to reach 90% or above, and has the advantages of simplicity, fastness, low carbon emission and no "three wastes" in the whole decolorizing process.

Description

technical field [0001] The invention relates to a method for decolorizing a sugar solution, and belongs to the technical fields of food processing and chemical separation. Background technique [0002] Sugar is one of the three essential nutrients for the human body, and it can also be used to make soft white sugar, granulated sugar, rock sugar, candy, etc. In 2017, global sugar production was close to 180 million tons, with Brazil leading the way. China is one of the largest producers of sucrose, as well as a major sugar consumer. Sugar liquid extracted from crops such as sugarcane and beet, as well as primary products such as brown sugar, raw sugar, and maltose, contain more pigment molecules, mostly lutein, carotene, phenols, quinones, and caramel. In order to produce high value-added products such as white sugar and refined sugar, it is necessary to remove the pigment contained in the solution of the above sugar products (hereinafter referred to as sugar solution). Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13B20/16C13K1/04C13K1/08C13K5/00C13K7/00C13K11/00C13K13/00B01D71/10B01D67/00
CPCB01D67/0002B01D67/0016B01D71/10C13B20/165C13K1/04C13K1/08C13K5/00C13K7/00C13K11/00C13K13/002C13K13/007
Inventor 艾硕韦丹黄永春黄承都张昆明杨锋
Owner 澳泰(广东)生物科技有限公司
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