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Method of high-value comprehensive utilization of bamboo remainders

A residual and high-value technology, applied in aldehyde/ketone condensation polymer adhesives, adhesive types, textiles and papermaking, etc., to achieve obvious technical advantages, low free formaldehyde content, mild and selective liquefaction process conditions Effect

Inactive Publication Date: 2010-01-06
HUANGSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no research report on the chemical comprehensive utilization of bamboo.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Selective liquefaction process:

[0028] Heat 85.0g of phenol to 75°C, add 15.0g of bamboo powder passed through a 40-mesh sieve, 1.5mL of concentrated phosphoric acid, and 10.0mL of 3mol / L hydrochloric acid, raise the temperature to 105°C and keep it warm for 60min to obtain a liquefied product of bamboo powder.

[0029] 2. Filtration and separation process:

[0030] The liquefied product of bamboo powder is suction filtered while it is hot to obtain the phenolic solution and residue, the residue is washed with hot water at 85°C and ethanol with a volume fraction of 95% until white, and the resulting white substance is dried at 120°C and dried to obtain white Bamboo fiber powder 4.0g.

[0031] 3. Glue making process:

[0032] Add 48.2 g of sodium hydroxide solution with a weight concentration of 30% into the obtained phenolic solution (the lye has been dissolved in the distillation residue, the same below), after stirring for 20 min, add 87.5 g of formaldehyde wit...

Embodiment 2

[0034] 1. Selective liquefaction process:

[0035] Heat 70.0g of phenol to 45°C, add 30.0g of bamboo powder passed through an 80-mesh sieve and 25.0mL of 4mol / L hydrochloric acid, heat up to 110°C and keep it warm for 45min to obtain a liquefied product of bamboo powder.

[0036] 2. Filtration and separation process:

[0037] The bamboo powder liquefaction product was suction filtered while it was hot to obtain the phenolic solution and the residue, the residue was washed with an ethanol solution with a volume concentration of 90% until it was white, and the resulting white substance was dried at 120° C., and dried to obtain 7.8 g of white bamboo fiber powder .

[0038] 3. Glue making process:

[0039] Add 48.3 g of sodium hydroxide solution with a weight concentration of 35% to the obtained phenolization solution, stir for 25 minutes, then add 65.5 g of formaldehyde with a weight concentration of 37.0%, heat up to 80° C., react for 20 minutes, and then add a weight concentr...

Embodiment 3

[0041] 1. Selective liquefaction process:

[0042] Heat 80.0g of phenol to 80°C, add 20.0g of bamboo powder passed through a 5-mesh sieve and 5.0mL of 9mol / L sulfuric acid, raise the temperature to 90°C and keep it for 30min to obtain the liquefaction product of bamboo powder.

[0043] 2. Filtration and separation process:

[0044] The bamboo powder liquefaction product was suction filtered while it was hot to obtain the phenolic solution and the residue. The residue was washed with a 95% ethanol solution until white, and the resulting white substance was dried at 120° C., and dried to obtain 5.9 g of white bamboo fiber powder.

[0045] 3. Glue making process:

[0046] Add 59.6 g of sodium hydroxide solution with a weight concentration of 25% to the obtained phenolization solution, stir for 15 minutes, then add 59.0 g of formaldehyde with a weight concentration of 37.0%, heat up to 80° C., react for 20 minutes, and then add a weight concentration of 37.0 % formaldehyde 45.9g...

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Abstract

The invention discloses a method of high-value comprehensive utilization of bamboo remainders. The method comprises the following steps: selective liquefaction working procedure, filtering separation working procedure and glue-making working procedure. Compared with the prior art, the invention has the advantages that firstly, due to the adoption of the milder selective liquefaction working procedure condition, the liquefaction is performed to the hemicellulose, the lignin and the partial cellulose (mainly amorphous part) which are easier to be liquefied in the bamboo material, the application performances (viscosity, fluidity and storage stability ) of the liquefaction solution are enhanced, the high-purity bamboo cellulose miropowder is also obtained and the high-value and full utilization of the bamboo remainders are realized; secondly, the poisonous eluting solvent is not required to be used for the obtained liquefaction solution, and the obtained liquefaction solution can be directly used for resinified synthesization; the treatment is performed to the liquefaction residuals by adopting hot water and ethyl alcohol to obtain the bamboo cellulose miropowder with high-value utilization; and the liquefaction and separation technology is simpler, more convenient and more environmental-friendly, the energy consumption is greatly reduced and the process is economical and feasible.

Description

technical field [0001] The invention relates to the field of deep processing of forest by-products, in particular to a method for high-value comprehensive utilization of bamboo residues. Background technique [0002] The mechanical properties of natural bamboo are very superior, and its tensile strength is higher than other natural materials (except hemp), so it is more suitable as a reinforcement for composite materials. In addition, bamboo itself has the characteristics of antibacterial, antibacterial, anti-ultraviolet, good air permeability, etc., and bamboo grows rapidly, matures quickly, and has high yield. It is a renewable resource with abundant, short growth cycle and strong environmental protection function, especially in my country Bamboo resources are extremely rich, and the research and development of bamboo can alleviate the ecological imbalance caused by the excessive use of wood. With the shortage of petroleum resources and the increasingly prominent environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00C09J161/06
Inventor 方红霞孙金余胡长玉吴强林
Owner HUANGSHAN UNIV
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