Preparation method for biomass medicinal charcoal

A technology of biomass and medicinal charcoal, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of high production cost, low adsorption performance, poor applicability, etc., save log materials, and be easy to operate , Accelerate the effect of effective utilization

Inactive Publication Date: 2012-05-09
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason why biomass activated carbon cannot replace wood activated carbon for chemical decolorization and refining is that biomass activated carbon has high ash content and low adsorption performance, and cannot meet the technical index requirements for chemical decolorization and refining. How to reduce the ash content of biomass activated carbon and improving its ads

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] Example 1:

[0016] The preparation method of biomass medicinal activated carbon involved in this embodiment is carried out in the following steps:

[0017] (1) Walnut shell crushing: crush the walnut shell through a 20-200 mesh sieve;

[0018] (2) Walnut shell screening and impurity removal: the walnut shell powder crushed in step (1) is sieved and impurity removed by double layers;

[0019] (3) Pickling and alkaline washing: the walnut shell powder after the removal of impurities in step (2) is pickled with an acid solution with a mass percentage concentration of 15%, and then washed with water to neutrality, and then with a mass percentage concentration of Carry out alkaline washing with 15% lye, and then rinse with water to neutral, the washing temperature is 80-100℃, and the washing time is 240 minutes;

[0020] (4) Drying: the walnut shell powder washed in step (3) is rinsed and then dried at 100°C;

[0021] (5) Carbonization: The walnut shell powder dried in step (4) is se...

Example Embodiment

[0023] Example 2:

[0024] The preparation method of biomass medicinal activated carbon involved in this embodiment is carried out in the following steps:

[0025] (1) Peanut shell crushing: crush the peanut shell through a 120-200 mesh sieve;

[0026] (2) Peanut shell screening and impurity removal: the peanut shell powder crushed in step (1) is removed by double-layer sieve;

[0027] (3) Pickling and alkaline cleaning: the peanut shell powder after the removal of impurities in step (2) is pickled with an acid solution with a mass percentage concentration of 10%, and then washed with water to neutrality, and then with a mass percentage concentration of Carry out alkaline washing with 10% lye, and then rinse with water to neutral, the washing temperature is 100°C, and the washing time is 120 minutes;

[0028] (4) Drying: Rinse the peanut shell powder that has been washed in step (3), and then dry it at 110°C;

[0029] (5) Carbonization: The peanut shell powder dried in step (4) is sent ...

Example Embodiment

[0031] Example 3:

[0032] The preparation of the biomass medicinal activated carbon involved in this embodiment is carried out in the following steps:

[0033] (1) Corn stalk crushing: crush corn stalks through 80-120 mesh sieve;

[0034] (2) Corn stalk screening and impurity removal: the corn stalk powder crushed in step (1) is sieved and impurity removal by double layers;

[0035] (3) Pickling and alkaline cleaning: the corn stalk powder after removal of impurities in step (2) is pickled with an acid solution with a mass percentage concentration of 5%, and then washed with water to neutrality, and then used with a mass percentage concentration of Carry out alkaline washing with 5% lye, then rinse with water to neutral, washing temperature is 90℃, washing time is 20 minutes;

[0036] (4) Drying: Rinse the corn stover powder, which has been washed in step (3), and then dry it at 120°C;

[0037] (5) Carbonization: The corn stalk powder dried in step (4) is fed into the activation furnac...

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Abstract

The invention discloses a preparation method for biomass medicinal charcoal, which belongs to the technical field of processing and preparation of activated charcoal, and aims to reduce ash content in activated charcoal and to improve adsorption performance of the activated charcoal. The method comprises the following steps: crushing biomass and screening the biomass with a 20 to 200 mesh sieve; carrying out pickling and alkali washing on the biomass after screening and removal of impurities; drying the biomass; sending the raw material of the treated biomass to an activation furnace, heating the raw material to a temperature of 300 to 600 DEG C under the protection of nitrogen and carrying out carbonization for 30 to 240 minutes; allowing carbon dioxide to enter into the activation furnace at a temperature of 800 to 1000 DEG C, carrying out carbonization for 30 to 360 minutes, with gas flow being 10 to 300 L/h, and after carbonization, cooling the biomass to room temperature so as to obtain the biomass medicinal charcoal. Ash content, decolouring capacity and adsorption quantity of the prepared biomass medicinal charcoal are all superior to those of wooden activated charcoal; the biomass medicinal charcoal has the advantages of a simple operation process, low cost, suitability for large scale production and strong market competitiveness.

Description

Technical field: [0001] The invention belongs to the technical field of biomass medicinal charcoal production, and relates to a method for preparing activated carbon used for medicine decolorization and refining, in particular to a method for preparing biomass medicinal charcoal by pretreatment. Background technique: [0002] At present, wood activated carbon is generally used for decolorization and refining of traditional Chinese medicines. In recent years, with the improvement of people's awareness of environmental protection, and the country has issued corresponding natural forest and wood protection policies, the supply of raw materials for wood activated carbon manufacturers is scarce. Wood activated carbon The supply is increasingly insufficient, and the price remains high; most of the existing activated carbon manufacturers and research institutions are devoting themselves to the development of cheap and easy-to-obtain activated carbon for the decolorization and refini...

Claims

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Application Information

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IPC IPC(8): C01B31/10C01B32/336
Inventor 郭庆杰付国家郭拓刘新民田红景王许云
Owner QINGDAO UNIV OF SCI & TECH
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