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Method for extracting essential oil from wood processing waste Chinese fir chips to co-produce chemical method activated carbon

A technology of fir wood chips and chemical method, which is applied in chemical instruments and methods, inorganic chemistry, essential oils/fragrances, etc., can solve the problems of imperfect industrialization of sawdust powdered activated carbon, failure to achieve comprehensive utilization of fir wood chips, and low market competitiveness. , to achieve the effect of reducing natural resource exploitation, efficient and comprehensive utilization of waste, and enhancing industrial competitiveness

Inactive Publication Date: 2014-04-30
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The product yield of this method is low, about 10-13 tons of fir sawdust can produce 1 ton of activated carbon, and the consumption of wood chips is relatively large, and the industrialization of physical method wood chip powdered activated carbon in the activated carbon industry is not yet perfect, the production cost is high, and the market competition The power is not high; the high temperature of about 1000 ℃ is required in the production, the energy consumption is high, and the most efficient comprehensive utilization of fir wood chips has not been achieved.

Method used

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  • Method for extracting essential oil from wood processing waste Chinese fir chips to co-produce chemical method activated carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Use the waste heat boiler to recover the steam generated during the preheating of the activated carbon production process to distill the screened fresh fir chips with a water content of 30%. The distillation temperature is 110°C. After 3 hours of distillation, the active ingredients contained in the fir chips Enter the cooling process together with the steam to obtain liquid crude oil water, and obtain fir essential oil after oil-water separation, and the residue is fir sawdust after oil extraction;

[0038] 2) After oil extraction, mix fir chips and 60%wt phosphoric acid solution according to the ratio of phosphorus to wood 2.0:1, and add catalyst concentrated sulfuric acid (98%wt) according to 1% of the mass of phosphoric acid, and send the mixture into a closed insulation barrel Keep the constant temperature at 70°C for 3 hours and then transfer to the carbonization converter for carbonization. The temperature of the carbonization furnace is 250°C, and the residenc...

Embodiment 2

[0040] 1) Use the waste heat boiler to recover the steam generated by the preheating in the production process of activated carbon to distill the screened fresh fir chips with a water content of 30%. The distillation temperature is 110°C. After 3 hours of distillation, the effective The components enter the cooling process together with the steam to obtain liquid crude oil water, and the fir essential oil is obtained after the oil and water are separated, and the residue is fir sawdust after oil extraction;

[0041] 2) After oil extraction, the fir sawdust and 65%wt phosphoric acid solution were mixed according to the ratio of phosphorus to wood 2.0:1, and the catalyst concentrated sulfuric acid (98%) was added according to 2% of the mass of phosphoric acid, and the mixture was sent into a closed insulation barrel at 80 Keep the temperature at ℃ for 1.5 hours and then transfer to the plasticizing converter. The plasticizing temperature is 150℃ and the residence time is 1 hour. ...

Embodiment 3

[0043] 1) Use the waste heat boiler to recover the steam generated by the preheating in the production process of activated carbon to distill the screened fresh fir chips with a water content of 30%. The distillation temperature is 110°C. After 3 hours of distillation, the effective The components enter the cooling process together with the steam to obtain liquid crude oil water, and the fir essential oil is obtained after the oil and water are separated, and the residue is fir sawdust after oil extraction;

[0044] 2) Mix fir chips after oil extraction with 65%wt phosphoric acid solution according to the ratio of phosphorus to wood 2.0:1, and add catalyst concentrated sulfuric acid (98%) according to 1% of the mass of phosphoric acid, and send the mixture into a closed insulation barrel at 70 Keep the constant temperature at ℃ for 2 hours, then transfer to the plasticizing converter for plasticization, the plasticizing temperature is 150℃, and the residence time is 1 hour. Th...

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Abstract

The invention proposes a method for extracting essential oil from wood processing waste Chinese fir chips to co-produce chemical method activated carbon. The method comprises the following steps: distilling fresh Chinese fir chips by water vapor; carrying out oil-water separation on condensate to obtain fir essential oil after cooling by obtained vapor; mixing the Chinese fir chips with a phosphoric acid according to the mass ratio of pure phosphoric acid to absolute dry sawdust of (1.8-3.0):1 after extracting oil; adding a cocatalyst concentrated sulfuric acid to fully mix according to the ratio of 1-8% of mass of the phosphoric acid, and then feeding to a sealed insulating barrel to carry out low-temperature osmotic treatment at 30-90 DEG C for 1-48 hours; carrying out carbonization, activation and post-treatment on the chemical method activated carbon; or carrying out plastifying, kneading, molding, drying and solidifying, carbon activation and post-treatment to obtain the chemical method granular activated carbon. Wooden column activated carbon can be prepared under the condition of not adding a binder, so that a plurality of purposes of efficient and comprehensive utilization of wastes, reduction of natural resource exploitation, reduction of environmental pollution, energy conservation and emission reduction are achieved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a technology for extracting essential oil from fir sawdust from wood processing waste and co-producing chemical active carbon. Background technique [0002] Chinese fir is an important timber tree species in my country, and it is widely distributed in southern China. Among them, southwestern Hunan, southern Jiangxi, southern Zhejiang, Guangdong, Guangxi and northern Fujian are the central producing areas of Chinese fir. According to the statistics of the fourth national continuous inventory of forest resources: my country's fir plantation area reached 9.11 million hm2 2 , accounting for 30.4% of the national artificial timber forest area, with a total stock volume of 340 million m 3 , the stock volume of many mature forests can reach 105m 3 / hm 2 , occupies an important position in the national economy. Jiangxi is one of the main distribution areas and origins of Chin...

Claims

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Application Information

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IPC IPC(8): C11B9/02C01B31/08C01B32/324
Inventor 朱光真邓先伦孙康郭昊张燕萍
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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