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Method for performing steam explosion on chestnut hulls and coproducing pigment, tanning extract and active carbon

A technology of chestnut husk and activated carbon is applied in the field of comprehensive utilization of natural biomass resources, which can solve the problems of chestnut husk retention, difficult to maximize utilization of chestnut husk resources, pollution, etc., to improve extraction rate, pollution-free comprehensive utilization, reduce The effect of extracting water consumption

Inactive Publication Date: 2013-07-10
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, judging from the current patents and literature reports, the utilization of chestnut husks is still at the level of single product development, which not only makes it difficult to maximize the utilization of chestnut husk resources, but also causes serious pollution problems

Method used

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  • Method for performing steam explosion on chestnut hulls and coproducing pigment, tanning extract and active carbon
  • Method for performing steam explosion on chestnut hulls and coproducing pigment, tanning extract and active carbon

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Wash the chestnut buds with water to remove impurities such as sand grains, drain the water, add water with a pH value of 8.0 according to 1:1 (w / v) and soak for 20 minutes, and then place them together in a steam explosion device. The pressure is quickly released, the steam-exploded product is filtered through gauze for solid-liquid separation, and the solid residue is dried in an oven at 60°C to obtain the steam-exploded chestnut bud. Steam-exploded chestnut bracts were mixed with pH 8.0 aqueous solution at a ratio of 1:10, extracted at 90°C for 2 hours, and the filtrate and residue were separated by filtration. The filtrate was used to prepare chestnut bract pigment and extract, and the residue was used to prepare activated carbon. The separation of pigment and tannin in the filtrate adopts the ultrafiltration membrane filtration method, and the molecular weight range of the ultrafiltration membrane is 1000; the permeate and the retentate are collected, and then conce...

Embodiment 2

[0024] Wash the chestnut buds with water to remove impurities such as sand grains, drain the water, add water with a pH value of 8.0 according to 1:1 (w / v) and soak for 20 minutes, and then place them together in a steam explosion device. The pressure is quickly released, the steam-exploded product is filtered through gauze for solid-liquid separation, and the solid residue is dried in an oven at 60°C to obtain the steam-exploded chestnut bud. Steam-exploded chestnut bracts were mixed with pH 9.0 aqueous solution at a ratio of 1:20, extracted at 100°C for 2 hours, and the filtrate and residue were separated by filtration. The filtrate was used to prepare chestnut bract pigment and extract, and the residue was used to prepare activated carbon. The separation of pigment and tannin in the filtrate adopts the ultrafiltration membrane filtration method, and the molecular weight range of the ultrafiltration membrane is 500; the permeate and the retentate are collected, and then conce...

Embodiment 3

[0026] Wash the chestnut buds with water to remove impurities such as sand grains, drain the water, add water with a pH value of 8.0 according to 1:1 (w / v) and soak for 20 minutes, and then put them together in a steam explosion device. The pressure is quickly released, the steam-exploded product is filtered through gauze for solid-liquid separation, and the solid residue is dried in an oven at 60°C to obtain the steam-exploded chestnut bud. Steam-exploded chestnut bracts were mixed with pH 9.0 aqueous solution at a ratio of 1:8, extracted at 85°C for 4 hours, and the filtrate and residue were separated by filtration. The filtrate was used to prepare chestnut bract pigment and extract, and the residue was used to prepare activated carbon. The separation of pigment and tannin in the filtrate adopts the ultrafiltration membrane filtration method, and the molecular weight range of the ultrafiltration membrane is 500; the permeate and the retentate are collected, and then concentra...

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Abstract

The invention discloses a method for performing steam explosion on chestnut hulls and coproducing a pigment, a tanning extract and active carbon, which comprises the following steps of: performing steam explosion treatment on the chestnut hulls to obtain steam-exploded chestnut hulls; extracting the pigment and tannin from the steam-exploded chestnut hulls, and filtering to separate filtrate and filter residue; filtering the filtrate by using an ultrafiltration membrane, and concentrating under reduced pressure to obtain the high-purity pigment and tanning extract; and drying the filter residue for preparing high-activity active carbon. The technical scheme provided by the invention is completely clean without pollution, can realize steam explosion of the chestnut hulls and coproduction of the pigment, the tanning extract and the active carbon, and realizes the full utilization of the chestnut hull resource; moreover, the water consumption of pigment extraction is reduced, so the energy consumption of the subsequent technological process is reduced.

Description

【Technical field】 [0001] The invention belongs to the technical field of comprehensive utilization of natural biomass resources, and in particular relates to a method for co-producing pigment, tannin extract and activated carbon by steam explosion of chestnut buds. 【Background technique】 [0002] Chestnut (Castanea mollssima) belongs to the fagaceae family. There are extremely rich chestnut resources in China. At present, the annual output of chestnut in my country has reached more than 800,000 tons, and the output has reached more than 60%-75% of the world's chestnut output. Chestnut bracts, also known as chestnut pods and chestnut shells, are the wrappings of the outer layer of chestnuts, and are the waste left after picking chestnuts. The quantity is huge. Chestnut buds are mainly composed of lignocellulose, and generally there are 60-90 kg of dry chestnut buds per 100 kg of chestnuts produced (including empty canopy and chestnut buds dropped due to disease). [0003] Ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B61/00C07G99/00C01B31/12
Inventor 陈洪章邱卫华
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI