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

AI Technical Summary

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 n

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

Example Embodiment

[0036] Example 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 fresh cedar shavings with a water content of 30%, the distillation temperature is 110 ℃, and the effective ingredients contained in the cedar shavings after 3 hours of distillation It enters the cooling process along with the steam to obtain liquid crude oil water. After oil-water separation, cedar essential oil is obtained, and the remainder is cedar shavings after oil extraction;

[0038] 2) After extracting the oil, cedar shavings and 60%wt phosphoric acid are mixed according to the phosphorus-wood ratio of 2.0:1, and 1% of the mass of phosphoric acid is added to the catalyst concentrated sulfuric acid (98%wt), and the mixture is sent to a closed insulated barrel After being kept at a constant temperature of 70°C for 3 hours, it is transferred to a carbonization converter for carbonization. The temperature of the c...

Example Embodiment

[0039] Example 2:

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

[0041] 2) After extracting the oil, cedar chips and 65%wt phosphoric acid are mixed according to the phosphorus-wood ratio of 2.0:1, and 2% of the mass of phosphoric acid is added to the catalyst concentrated sulfuric acid (98%). After being kept at a constant temperature for 1.5 hours, it is transferred to the plasticizing converter, the plasticizing temperature is 150°C, and the residence time is 1 hour. The plasticize...

Example Embodiment

[0042] Example 3:

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

[0044] 2) After extracting the oil, cedar shavings and 65%wt phosphoric acid are mixed according to the phosphorus-wood ratio of 2.0:1, and the catalyst concentrated sulfuric acid (98%) is added according to 1% of the mass of phosphoric acid. After being kept at a constant temperature for 2 hours, it is transferred to a plasticizing and plasticizing converter for plasticization. The plasticizing temperature is 150°C and ...

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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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