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Co-production method of camellia oleifera xylooligosaccharide, lignin and active carbon

A technology of xylo-oligosaccharides and lignin, which is applied in the production of sugar, xylose, sugar production, etc., can solve the problems of low added value and low utilization rate of products, and achieve high added value and high utilization rate of products. , The effect of activated carbon with excellent performance indicators

Active Publication Date: 2020-07-31
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there have been research reports on the preparation of furfural, xylitol or activated carbon by using camellia oleifera husk, but the utilization rate is not high, the added value of the product is low, and industrial production has not yet been realized.

Method used

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  • Co-production method of camellia oleifera xylooligosaccharide, lignin and active carbon

Examples

Experimental program
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Embodiment 1

[0031] The present embodiment provides a kind of method utilizing Camellia oleifera to co-produce lignin, xylo-oligosaccharides and activated carbon, such as figure 1 shown, including:

[0032] Air-dry the harvested Camellia oleifera husks, pulverize them with a pulverizer, and sieve them through a 20-mesh sieve with a moisture content of ≤8%.

[0033] Use a 0.5% zinc chloride aqueous solution with a mass concentration of 130°C to pretreat the camellia oleifera shell for 10 minutes, and the solid-to-liquid ratio is 1:10; continue to heat up to 170°C, pretreat for 30 minutes, and the reaction is over, moderately cool down to 85°C, and keep warm filter.

[0034] After drying the filter residue, impregnate it with 16% zinc chloride aqueous solution for 12 hours, the solid-to-liquid ratio is 1:2, and after filtering, place it in a nitrogen-filled tube furnace and heat it to 500°C, synchronously carbonize and activate it for 1 hour, cool down to room temperature, and wash with 10%...

Embodiment 2

[0037] The present embodiment provides a method for co-producing lignin, xylooligosaccharides and activated carbon by using Camellia oleifera, including:

[0038] Air-dry the harvested Camellia oleifera husks, pulverize them with a pulverizer, and sieve them through a 20-mesh sieve with a moisture content of ≤8%.

[0039] Use 0.5% zinc chloride aqueous solution to pretreat the camellia oleifera shell at 130°C for 10 minutes, with a solid-to-liquid ratio of 1:10; continue to heat up to 170°C, pretreat for 10 minutes, and after the reaction is complete, moderately cool down to 85°C and filter while hot. After drying the filter residue, impregnate it with 16% zinc chloride aqueous solution for 12 hours, the solid-to-liquid ratio is 1:2, and after filtering, place it in a nitrogen-filled tube furnace and heat it to 500°C, synchronously carbonize and activate it for 1 hour, cool down to room temperature, and wash with 10% HCl Three times, wash with distilled water to neutrality, an...

Embodiment 3

[0042] The present embodiment provides a method for co-producing lignin, xylooligosaccharides and activated carbon by using Camellia oleifera, including:

[0043] Air-dry the harvested Camellia oleifera husks, pulverize them with a pulverizer, and sieve them through a 20-mesh sieve with a moisture content of ≤8%.

[0044]Use 0.5% zinc chloride aqueous solution to pretreat the camellia oleifera shell at 130°C for 10 minutes, and the solid-to-liquid ratio is 1:10; continue to heat up to 170°C, pretreat for 50 minutes, and after the reaction is completed, moderately cool down to 85°C and filter while hot. After drying the filter residue, impregnate it with 16% zinc chloride aqueous solution for 12 hours, the solid-to-liquid ratio is 1:2, and after filtering, place it in a nitrogen-filled tube furnace and heat it to 500°C, synchronously carbonize and activate it for 1 hour, cool down to room temperature, and wash with 10% HCl Three times, washed with distilled water until neutral,...

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Abstract

The invention belongs to the technical field of biomass chemistry and chemical engineering, and particularly relates to a co-production method of camellia oleifera xylooligosaccharide, lignin and active carbon. The method comprises the following steps: taking camellia oleifera shells as a raw material, carrying out a zinc chloride variable-temperature pretreatment and filtering; treating the filter residue I with zinc chloride, filtering, carbonizing and activating to obtain active carbon; cooling and filtering the filtrate I, drying the obtained filter residue II to obtain lignin, and concentrating and drying the obtained filtrate II to obtain xylooligosaccharide. A single catalyst zinc chloride is adopted for the first time, serves as a catalyst for the pretreatment of the camellia oleifera shells and also serves as an activating agent for preparing active carbon from camellia oleifera shell solid residues; meanwhile, through combination of specific variable-temperature pretreatmentand an activation process, lignin is obtained, the yield of xylooligosaccharide and active carbon is greatly increased, and the performance index of the active carbon is more excellent, so that the utilization rate of camellia oleifera shell components and the additional value of the product are higher.

Description

technical field [0001] The invention belongs to the technical field of biomass chemistry and chemical engineering, and in particular relates to a co-production method of camellia oleifera xylooligosaccharides, lignin and activated carbon. Background technique [0002] Camellia oleifera husk accounts for about 60% of the total amount of camellia oleifera fruit. Camellia oleifera husk contains 13.5% cellulose, 23.5% hemicellulose and 30.4% lignin, of which hemicellulose is mainly xylan, which is the preparation of xylooligosaccharides. Ideal raw material for activated carbon. [0003] At present, there have been research reports on the preparation of furfural, xylitol or activated carbon by using camellia oleifera husk, but the utilization rate is not high, the added value of the product is low, and industrial production has not yet been realized. Contents of the invention [0004] In order to solve the above problems, the present invention provides a co-production method o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/348C13K13/00C08H7/00
CPCC08H6/00C13K13/002C01B32/324C01B32/348
Inventor 蒋建新游艳芝张献琨朱莉伟
Owner BEIJING FORESTRY UNIVERSITY
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