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A method for reducing wood tar in the process of preparing wood vinegar

A technology of wood vinegar and wood tar, which is applied in the field of wood vinegar, can solve the problems of complex process of removing wood tar, unfavorable refining of wood vinegar, high purity of wood vinegar, etc., and achieve the goal of rich raw materials, less impurities and high purity Effect

Inactive Publication Date: 2017-09-15
SHAOXING TEXTILE MACHINERY GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: A large amount of wood tar will be produced in the current preparation process of wood vinegar, and the process of removing wood tar is complicated, which is not conducive to the refining of wood vinegar, and a process for preparing wood vinegar is provided. In the method of reducing wood tar, this method uses waste wood to be crushed into granules and put into the fermentation tank, and some substances are added to carry out anaerobic fermentation. A layer of millet is spread under the high-temperature furnace, and then the fermented and air-dried wood granules are piled up. On the top, spray rice bran on the upper layer, collect in 3 temperature sections of high-temperature furnace to obtain crude wood vinegar liquid, then carry out vacuum distillation to remove water, seal and stand still, add NaCl solid to the liquid after standing for hydraulic freezing treatment and filtering, the obtained wood vinegar is extracted and recovered with ether to obtain refined wood vinegar, which can effectively remove the wood tar in the wood vinegar in the preparation process of the method, and the finally obtained wood vinegar has high purity and few impurities. Moreover, the process is simple and the cost is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] First select 1kg of waste wood, put it into a pulverizer and crush it into 2cm particles, put the particles into the fermentation tank, and wet it with water, so that 50% of the wood is soaked in water, and then add 20% of the weight of the wood to the tank with acetic acid Ethyl ester, wood quality 3% sodium thiosulfate and wood quality 1% cellulase, and stir and mix evenly, control the temperature in the fermenter to carry out sealed anaerobic fermentation for 4 days under 38°C; the fermented wood particles from Take it out of the tank, put it in the sun to dry naturally, until the moisture in the wood particles is 8%, and then collect it in bags; first spread a layer of millet with a thickness of 2cm under the high-temperature furnace, and then stack the millet with a thickness of 10cm above the millet For the dried wood particles, a layer of rice bran with a thickness of 6cm is evenly spread on the wood particles. Water vapor is constantly fed into the furnace to co...

example 2

[0023]First select 1.5kg of waste wood, put it into a pulverizer and crush it into 3cm particles, put the particles into the fermentation tank, and wet it with water, so that 55% of the wood is soaked in water, and then add 25% of the wood mass to the tank respectively Ethyl acetate, wood quality 4% sodium thiosulfate and wood quality 2% cellulase, and stir and mix evenly, control the temperature in the fermentation tank to carry out sealed anaerobic fermentation for 4.5 days at 45°C; the fermented wood particles Take it out from the tank, put it in the sun to dry naturally, until the moisture in the wood particles is 9%, and then collect it in bags; first spread a layer of millet with a thickness of 2.5cm evenly under the high-temperature furnace, and then stack the thickness of millet on the millet 13cm of the above-mentioned sun-dried wood particles, and finally evenly spread a layer of rice bran with a thickness of 7cm on the wood particles. Water vapor is continuously fed...

example 3

[0026] First select 2kg of waste wood, put it into a pulverizer and crush it into 4cm particles, put the particles into a fermentation tank, and wet it with water, so that 60% of the wood is soaked in water, and then add 30% of the weight of the wood to the tank with acetic acid Ethyl ester, wood quality 5% sodium thiosulfate and wood quality 3% cellulase, and stir and mix evenly, control the temperature in the fermenter to carry out sealed anaerobic fermentation for 5 days under 55°C; the fermented wood particles from Take it out of the tank, put it in the sun to dry naturally, until the moisture in the wood particles is 10%, and then collect it in bags; first spread a layer of millet with a thickness of 3cm under the high-temperature furnace, and then stack the millet with a thickness of 15cm. For the dried wood particles, a layer of rice bran with a thickness of 8cm is evenly spread on the wood particles. Water vapor is continuously fed into the furnace to collect crude woo...

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Abstract

The invention relates to a method for reducing wood tar in the preparation process of wood vinegar, which belongs to the field of wood vinegar. Aiming at the defects that since a large amount of wood tar is generated in the preparation process of the wood vinegar, and the removing process of the wood tar is complex, the refining of the wood vinegar is disadvantageous, the invention provides the method for reducing the wood tar in the preparation process of the wood vinegar. The method comprises the following steps of crushing wood into particles and then placing the particles in a fermentation tank for fermenting; laying a layer of millets below a high-temperature furnace; stacking the wood particles on the millets; spraying rice bran on an upper layer; collecting at three temperature intervals to obtain crude wood vinegar; performing reduced pressure distillation to remove water and then sealing and standing; adding a NaCl solid in the liquid for hydraulic freezing treatment and filtering; extracting the obtained wood vinegar with diethyl ether and recovering to prepare the refined wood vinegar. According to the method, the wood tar in the wood vinegar in the preparation process can be effectively removed, and the finally-prepared wood vinegar is high in purity and less in impurity; in addition, the method is simple in process and low in cost.

Description

technical field [0001] The invention relates to a method for reducing wood tar in the process of preparing wood vinegar, belonging to the field of wood vinegar. Background technique [0002] Wood vinegar is a reddish-brown liquid with a smoky smell obtained after condensation and separation of the steam and gas mixture exported from the wood distillation equipment. It is mainly acetic acid and contains alcohol, phenol, ketone, aldehyde and its derivatives, etc. mixture of substances. Because wood vinegar has the functions of killing insects, sterilizing bacteria, disinfecting soil, eliminating fecal odor, preserving freshness, promoting the growth of plants and edible fungi, it has been widely used in Japan, South Korea and other countries in recent years. [0003] Wood vinegar is mainly composed of water, methanol, formaldehyde, acetone, acetic acid, furfural, phenol and other alcohols, acids, phenols and ketone-aldehyde organic compounds. Among the organic matter, the co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C5/00C10B57/00C10K1/00
CPCY02E50/10
Inventor 谢如炎
Owner SHAOXING TEXTILE MACHINERY GRP