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Preparation method of yellow rice wine vinasse-based activated carbon

A technology of distiller's grains and activated carbon of yellow rice wine is applied in the field of resource utilization of distiller's grains, which can solve the problems of high carbonization temperature, large specific surface area of ​​activated carbon and low yield of activated carbon, and achieves the effects of lowering carbonization temperature, easy carbonization and improving yield

Inactive Publication Date: 2020-12-22
ZHEJIANG IND POLYTECHNIC COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the existing reports on the use of distiller's grains to prepare bio-based activated carbon, most of them directly carbonize distiller's grains at high temperature and then use physical or chemical activation. The activated carbon obtained has a large specific surface area and good adsorption performance, but the carbonization temperature is high and the yield of activated carbon is low. , only 10-20%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1: Weigh 10 g of rice wine distillers grains into a stoppered Erlenmeyer flask, add 200 ml of 1 mol / L hydrochloric acid solution to prepare a slurry, and hydrolyze in a water bath at 100°C for 10 hours to obtain a slurry hydrolyzate.

[0022] Step 2, vacuum-drying the above slurry hydrolyzate at 105° C. for 12 hours to obtain dried rice wine distillers grains.

[0023] Step 3, the above-mentioned dried rice wine distillers grains are continuously heated to 400°C at a heating rate of 5°C / min under a nitrogen atmosphere with a nitrogen flow rate of 100ml / min, calcined for 5 hours, and then cooled to room temperature.

[0024] Step 4, grinding the cooled calcined product, immersing in KOH solution for 12 hours, and vacuum-drying at 105°C for 24 hours to obtain activated carbon of rice wine distiller's grains. After testing, the yield of activated carbon is 47.5%, and the specific surface area is 1699m 2 / g.

Embodiment 2

[0031] Step 1: Weigh 100 g of rice wine distillers grains into a stoppered Erlenmeyer flask, add 500 ml of 1mol / L hydrochloric acid solution to prepare a slurry, and hydrolyze it in a water bath at 100°C for 10 hours to obtain a slurry hydrolyzate.

[0032] Step 2, vacuum drying the hydrolyzate at 105° C. for 24 hours to obtain dried rice wine distillers grains.

[0033] In step 3, the dried rice wine distiller's grains are continuously heated to 500° C. at a heating rate of 10° C. / min under a nitrogen atmosphere with a nitrogen flow rate of 200 ml / min, calcined for 3 hours, and then cooled to room temperature.

[0034] Step 4, the calcined product after cooling is ground, in ZnCl 2 Immersed in the solution for 24 hours, and vacuum dried at 105° C. for 24 hours to obtain activated carbon of rice wine distillers grains. After testing, the yield of activated carbon is 35.6%, and the specific surface area is 1163m 2 / g.

Embodiment 3

[0041] Step 1: Weigh 50 g of rice wine distillers grains into a stoppered Erlenmeyer flask, add 500 ml of 6 mol / L hydrochloric acid solution to prepare a slurry, hydrolyze in a water bath at 100°C for 5 hours to obtain a slurry hydrolyzate.

[0042] Step 2, vacuum drying the hydrolyzate at 105° C. for 24 hours to obtain dried rice wine distillers grains.

[0043] In step 3, the dried rice wine distiller's grains are continuously heated to 600°C at a heating rate of 20°C / min under a nitrogen atmosphere with a nitrogen flow rate of 500ml / min, calcined for 3 hours, and then cooled to room temperature.

[0044] Step 4, the above-mentioned cooled calcined product is ground, in K 2 CO 3 Immerse in the solution for 12 hours, and vacuum dry at 105° C. for 24 hours to obtain the activated carbon of rice wine distillers grains. After testing, the yield of activated carbon is 28.9%, and the specific surface area is 1895m 2 / g.

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Abstract

The invention discloses a preparation method of yellow rice wine vinasse-based activated carbon. The preparation method comprises the following steps: (1) preparing a slurry liquid in which a dosage ratio of yellow rice wine vinasse to a hydrochloric acid solution is 1g: (5-20) ml, and hydrolyzing the slurry liquid in a water bath kettle to obtain a slurry hydrolysate; (2) carrying out vacuum drying on the hydrolysate to obtain dried yellow rice wine vinasse; (3) calcining the dried yellow rice wine vinasse in a nitrogen atmosphere, and conducting cooling to room temperature; and (4) grindingthe cooled calcined product, dipping the ground product in a chemical activator, and carrying out vacuum drying to obtain the yellow rice wine vinasse-based activated carbon. The activated carbon is prepared by a method of hydrolysis, carbonization and activation in sequence, so the yield of the activated carbon can be greatly improved, carbonization temperature is reduced, and energy consumptionis lowered.

Description

technical field [0001] The invention relates to the field of resource utilization of distiller's grains, in particular to a preparation method of rice wine distiller's grains-based activated carbon. Background technique [0002] Rice wine is one of the three major brewing wines in my country. In 2019, the total output of rice wine in my country reached 3.2 million kiloliters. It takes 1.6 million tons of grain to produce 2L of wine with 1kg of rice. Distiller's grain production can reach about 480,000 tons. Rice distiller's grains are rich in protein, peptide, amino acid, starch, sugar, cellulose and other substances, and have a wide range of sources and low prices. They are an ideal resource for development and utilization. The method can reduce and prevent the environmental pollution caused by waste distiller's grains, and can also bring significant economic benefits. [0003] At present, with the enhancement of people's awareness of environmental protection and waste res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/348
CPCC01B32/324C01B32/348
Inventor 孔令鸟
Owner ZHEJIANG IND POLYTECHNIC COLLEGE
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