Preparation method of activated carbon by utilizing corncob hydrolysis residue

A technology for preparing activated carbon and preparation process, which is applied in fermentation and other directions to achieve the effect of reducing environmental protection pressure and improving economic benefits

Inactive Publication Date: 2010-09-22
FUTASTE PHARM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the prior art and solve the problem of low utilization rate of corncob waste residue in xylose production, the present invention provides a process for preparing activated carbon by using corncob hydrolysis residue, the purpose of which is to solve the problem of solid residue in the production of xylose and xylitol The problem of effective conversion and utilization, in order to reduce the environmental protection pressure of the industry, and at the same time create economic benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 50 g of the residue of enzymolysis corn cob slag after removing cellulose, put it into a 200ml beaker, add a phosphoric acid solution with a mass fraction of 40% according to the solid-liquid volume ratio of 1:3, and carbonize and activate it in a muffle furnace at 400°C for 120min. Wash with water at 75°C for 20 minutes, dry in an oven at 60°C for 24 hours, grind into powder, and sieve to obtain activated carbon. Add active carbon according to 1% of the dry content of the corn cob hydrolyzate to decolorize, and the light transmittance can be increased from 7% to about 62%.

Embodiment 2

[0018] Take 60 g of enzymolysis corn cob slag residue that has been decellulose, put it into a 200ml beaker, add a phosphoric acid solution with a mass fraction of 60% according to the solid-to-liquid volume ratio of 1:1, and carbonize and activate it in a muffle furnace at 500°C for 80min , washed with water at 75°C for 20min, dried in an oven at 60°C for 24h, ground into powder, and sieved to obtain activated carbon. Add activated carbon according to 1% of the dry matter content of the corn cob hydrolyzate to decolorize, and the light transmittance can be increased from 7% to about 66%.

Embodiment 3

[0020] Take 100 g of cellulose-removed enzymatic corncob residues, add it to a 200 ml beaker, add a phosphoric acid solution with a mass fraction of 85% according to the solid-to-liquid volume ratio of 1:2, and carbonize and activate it in a muffle furnace at 450 ° C for 80 min , washed with water at 75°C for 10min, dried in an oven at 60°C for 24h, ground into powder, and sieved to obtain activated carbon. Add active carbon according to 1% of the dry matter content of the corn cob hydrolyzate to decolorize, and the light transmittance can be increased from 7% to about 75%.

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Abstract

The invention discloses a preparation method of activated carbon by utilizing corncob hydrolysis residue, which belongs to the technical field of functional sugar production. The process comprises four steps of removing cellulose, carbonization-activation, washing and drying and grinding. The preparation process utilizes the corncob hydrolysis residue after enzymolysis by cellulase to prepare the activated carbon for producing xylose (or xylitol), which can not only meet the demands of self-production and reduce the production cost but also be sold as a commodity to acquire economic benefits directly, thus realizing a great leap from high residue discharge amount to zero discharge in the xylitol production, reducing the environmental protection pressure, creating economic benefits and meeting the national requirements of energy saving, emission reduction and sustainable development.

Description

technical field [0001] The invention belongs to the technical field of functional sugar production, and in particular relates to a method for preparing activated carbon for xylitol production from corncob hydrolysis slag and enzymolysis residue. technical background [0002] Xylitol is obtained from corncobs through hydrolysis, purification, hydrogenation and other processes. In the production of xylitol, the comprehensive utilization of corncob hydrolysis slag has always been a difficult problem in the xylitol industry. At present, the domestic xylitol production industry will produce a large number of residues every year. If it is directly discharged into the environment, it will cause great pollution and waste. Because its main components are cellulose and lignin, some companies use it to produce cellulosic ethanol, L-lactic acid and other products, and 50% of residues will be generated during the production of such products. Therefore, the comprehensive utilization of c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08C12P19/14
Inventor 田强秦海青张孝华邱学良杜瑞锋
Owner FUTASTE PHARM CO LTD
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