Method for preparing anesthesia activated carbon fiber

A technology of activated carbon fiber and hemp activated carbon is applied in the field of preparing hemp activated carbon fiber, which can solve the problems of low product strength and low carbon fiber yield, and achieve the effects of uniform pore size distribution, low raw material cost and wide source.

Inactive Publication Date: 2008-07-30
THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After consulting a large number of documents, only some people use sisal as raw material to prepare ACF, and the products produced are not strong
And take hemp skin or linen as main raw material to prepare activated carbon fiber and there is no literature report
[0006] Disclosed in Chinese patent 97108889.6 is a kind of preparation method of natural fiber-based activated carbon fiber, described method adopts natural fiber as raw material, after carrying out normal temperature immersion treatment with dilute sodium hydroxide solution, obtains the activated carbon fiber of high specific surface area, but, all The yield of carbon fiber in the above method is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh a certain amount of flax fiber and place it in a pretreatment container, add a pre-prepared 1mol / l phosphoric acid solution to the container until the hemp fiber is immersed in the phosphoric acid solution, heat up and cook, and keep the solution boiling. 6 hours, then take out the hemp fiber and dry it;

[0030] Then put it in a carbonization activation furnace, under the protection of nitrogen, heat up to 600°C at a rate of 5°C / min for carbonization and activation for 110 minutes, after the carbonization and activation treatment, cool to room temperature, and rinse with water repeatedly until neutral;

[0031] Water vapor is fed into the above product at a flow rate of 4ml / min, and activation treatment is carried out for 50 minutes. After the treatment, the obtained carbon fiber is dried to obtain hemp activated carbon fiber.

[0032] The specific surface area of ​​the activated carbon fiber is 1250m 2 / g, the activated carbon fiber yield is 50%.

Embodiment 2

[0034] Take a certain amount of ramie fiber and place it in a pretreatment container, add a pre-prepared 2.5mol / l zinc chloride solution in the container until the hemp fiber is immersed in the zinc chloride solution, heat and cook, Keep the solution for 4 hours after boiling, then take out the hemp fiber and dry it;

[0035] Then place it in a carbonization activation furnace, and under the protection of nitrogen, heat up to 1000°C at a rate of 10°C / min for carbonization for 30 minutes. After carbonization, cool to room temperature and rinse with water repeatedly until neutral;

[0036] Pass water vapor into the above product at a flow rate of 6ml / min, perform activation treatment for 35 minutes, and dry the obtained carbon fiber after the treatment to obtain hemp activated carbon fiber.

[0037] The specific surface area of ​​the activated carbon fiber is 1080m 2 / g, the activated carbon fiber yield is 40%.

Embodiment 3

[0039] Weigh a certain amount of industrial hemp and place it in a dipping container, add a dilute potassium hydroxide solution with a concentration of 1% by mass, soak for 8 hours at normal temperature, and drain the liquid after soaking.

[0040] The product obtained after draining is placed in a pretreatment container, and a pre-configured 4mol / l ammonium sulfate solution is added to the container until the hemp fiber is immersed in the ammonium sulfate solution, heated and boiled until the solution boils keep for 3 hours;

[0041] Then place it in a carbonization activation furnace, and under the protection of nitrogen, heat up to 800°C at a rate of 15°C / min for carbonization for 80 minutes. After carbonization, cool to room temperature and rinse with water repeatedly until neutral;

[0042] Pass water vapor into the above product at a flow rate of 3ml / min, perform activation treatment for 55 minutes, and dry the obtained carbon fiber after the treatment to obtain hemp act...

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Abstract

The invention provides a method of preparing a hemp activated carbon fiber, which adopts a hemp fiber or a hemp fabric as the raw material. The method includes the following steps: firstly, the hemp fiber or the hemp fabric is boiled in a pretreating solution, taken out and then dried; secondly, the obtained fiber or hemp fabric is put into a charing furnace, heated for charing under the protection of the nitrogen gas, then cooled to the room temperature and then rinsed repeatedly to be neutral; and thirdly, vapor is entered into the hemp fiber or the hemp fabric for an activation treatment, then dried after the activation treatment and finally a hemp activated carbon fiber is obtained. The specific surface area of the prepared activated carbon fiber is 680-1950m<2>/g and the yield of the activated carbon fiber is 20 to 62 percent.

Description

technical field [0001] The present invention relates to a kind of preparation method of activated carbon fiber, more specifically, what the present invention relates to is a kind of preparation method of hemp activated carbon fiber with hemp fiber or hemp fabric as raw material. Background technique [0002] Activated carbon fiber (Actived Carbon Fiber) is a new type of carbonaceous adsorption material developed by combining carbon fiber technology and activated carbon technology. It is the third generation of activated carbon products after powdered activated carbon and granular activated carbon. , polyacrylonitrile, rayon, coal tar pitch, plants, etc. as raw materials, made by carbonization and activation. Compared with traditional granular activated carbon (Granular Active Carbon), activated carbon fibers have developed micropores, narrow and uniform pore size distribution, large specific surface area, strong adsorption capacity, high strength, high purity, small filter r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/16D06M13/44D06M101/04
Inventor 郝新敏张建春杨儒张华
Owner THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME
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