Waste crop bast raw material resource utilization method

A crop and resource utilization technology, which is applied in the field of resource utilization of waste crops, can solve problems such as extraction and preparation of fiberboard resource utilization methods that have not been seen yet, and achieve the effects of mild conditions, reduced production costs, and strong gelation

Active Publication Date: 2018-05-18
INST OF BAST FIBER CROPS CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] So far, there has been no report on the resource utilization method of extracting pectin from the discarded stalks of linseed hemp, industrial hemp hemp and banana to prepare fiberboard

Method used

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  • Waste crop bast raw material resource utilization method
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 A kind of resource utilization method of waste industrial hemp seed hemp bast raw material

[0029] The bast raw material of industrial hemp seed hemp collected from Hunan Yuanjiang Experimental Base was dedusted and sanded by blasting, and then dried at 50°C until the moisture content was <5%; 2cm section, soaked in 0.5% ammonium oxalate solution (W / V) for 30min according to the bath ratio of 1:5, boiled for 2h, stirred once every 30min, then centrifuged at 4000r / min for 20min, collected separately Pectin solution and industrial hemp seed hemp bast fiber slag; adopt rotary evaporator to carry out low-temperature concentration to pectin solution, obtain the pectin concentrate that concentration is 0.2g / L, then add absolute ethanol in the pectin concentrate, Control the concentration of ethanol at 97%-98%, let it stand for 2.5 hours until the ramie pectin is fully precipitated, then wash the precipitate twice with 3 times the volume of 65% ethanol solution, ...

Embodiment 2

[0030] Embodiment 2 A kind of resource utilization method of discarded linseed hemp bast raw material

[0031] The linseed hemp bast raw material collected from the base of Heilongjiang Academy of Agricultural Sciences was dedusted and sanded by blasting, and then dried at 50°C until the moisture content was less than 5%. Get 10kg of linseed hemp bast raw material, chop into 2cm segments. Soak the raw material fragments of bast seed bast and 0.45% ammonium oxalate solution at a bath ratio (W / V) of 1:3, boil for 2 hours, stir once every 30 minutes, and then use an industrial centrifuge to centrifuge at 3500r / min for 20 minutes. Collect the pectin solution and linseed bast fiber residue; use a rotary evaporator to concentrate the pectin solution at low temperature to make the pectin content about 0.25g / L, add absolute ethanol to the pectin concentrate to make the ethanol concentration reach 98 %, let it stand for 3 hours, until the seed pectin is fully precipitated; then wash t...

Embodiment 3

[0032] Embodiment 3 A kind of resource utilization method of discarded banana stalk bast raw material

[0033]The bast raw material of banana stems collected from the planting base in Zhanjiang, Guangdong is dedusted and sanded by air blowing method, and then dried at 50°C until the water content is <3.5%; 10kg of bast raw materials of banana stems are taken, chopped into 2cm sections , soak in 0.48% ammonium oxalate solution (W / V) for 40 minutes according to the bath ratio of 1:4, boil for 2.5 hours, stir once every 30 minutes, and then use an industrial centrifuge to centrifuge at a speed of 3000r / min for 20 minutes. Collect the pectin solution and the bast fiber slag of banana stalks respectively; use a rotary evaporator to concentrate the pectin solution at low temperature to obtain a pectin concentrate with a concentration of 0.2g / L, and then add absolute ethanol to the pectin concentrate , make the concentration of ethanol reach 98%, leave standstill 2h, until banana sta...

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Abstract

The invention discloses a waste crop bast raw material resource utilization method. The waste crop bast raw material resource utilization method includes the steps that S1, an ionic type extraction agent is used for extracting the waste crop bast raw materials, and a pectin solution and bast fibrous residue can be obtained after separating solid and liquid; S2, ethyl alcohol is added after the pectin solution is condensed, static settlement is carried out after stirring, washing and drying are carried out, and finished pectin can be obtained; S3, acidizing is acted to the bast fibrous residue,and glass fiber is added to mix evenly, a binding agent and a curing agent are added, and fiberboards are obtained by compressing. According to the waste crop bast raw material resource utilization method, the bast fibrous residue is used for preparing the fiberboards after the pectin is extracted, the waste crop bast raw materials can be recycled to the maximum, the obtained pectin is green foodwithout pesticide pollution, transgenic ingredients are not contained, and the heat stability is high; and the performance of the fiberboards produced by the bast fibrous residue replacing portion ofthe glass fiber, the economic benefit of integrated utilization is better, and the practical significance is important.

Description

technical field [0001] The invention relates to the technical field of resource utilization of discarded crops, in particular to a method for resource utilization of bast raw materials of discarded crops. Background technique [0002] According to statistics, in 2016, there were as many as 15 billion tons of fiber-containing waste crop bast raw materials in the world. Due to their high economic value, flaxseed, industrial hempseed and bananas are planted in large areas all over the world. After harvesting their flaxseeds, industrial hempseeds and banana fruits, the stalk fibers are temporarily unavailable due to their low quality. Industrial uses with high economic value have been developed, and the natural degradation of these stalks is more difficult than other crops. They are usually directly incinerated, which easily causes environmental pollution and wastes resources. Therefore, it is imperative to find some new ways to recycle waste bast raw materials from crops. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/04B27N3/08B27N1/00C08B37/00
CPCB27N1/00B27N3/04B27N3/08C08B37/0048
Inventor 彭源德成莉凤段盛文冯湘沅杨琦刘志远郑科
Owner INST OF BAST FIBER CROPS CHINESE ACADEMY OF AGRI SCI
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