阅读说明：本技术 一种活性炭制备方法 (Preparation method of activated carbon ) 是由 谭必东 龚丽华 杨昌金 于 2019-11-29 设计创作，主要内容包括：本发明公开了一种活性炭制备方法,该方法包括如下步骤：将硬阔叶材、软阔叶材、针叶材按重量比3：2：5配料制成原料屑并铺层,层厚为3～5cm,并通过热风干燥；以氯化锌溶液作为活化剂与干燥后的原料屑混合,并利用搅拌机搅拌形成初料；将初料炭化,炭化温度为120～200℃；继续升温活化,活化温度为520～550℃,且活化时升温为匀速升温,升温速度为10℃/分钟,制得活性炭初样；加入工业盐酸,并通过过滤萃取装置将活性炭初样中的氯化锌分离出,水洗后冷风干燥即获得所述活性炭。与相关技术相比,本发明的活性炭制备方法生产成本低且制备的活性炭吸附性能好。(The invention discloses a preparation method of activated carbon, which comprises the following steps: hard broad-leaved wood, soft broad-leaved wood and coniferous wood are mixed according to the weight ratio of 3: 2: 5 preparing raw material scraps by batching, layering the raw material scraps to form a layer with the thickness of 3-5 cm, and drying the layer by hot air; mixing the zinc chloride solution serving as an activating agent with the dried raw material scraps, and stirring by using a stirrer to form a primary material; carbonizing the primary material at 120-200 ℃; continuously heating and activating, wherein the activation temperature is 520-550 ℃, the heating is constant temperature during activation, and the heating speed is 10 ℃/min, so as to prepare an activated carbon initial sample; adding industrial hydrochloric acid, separating zinc chloride in the active carbon sample by a filtering and extracting device, washing with water, and drying with cold air to obtain the active carbon. Compared with the prior art, the preparation method of the activated carbon has low production cost and the prepared activated carbon has good adsorption performance.)

1. A preparation method of activated carbon is characterized by comprising the following steps:

step S1, mixing hard broad-leaved wood, soft broad-leaved wood and coniferous wood according to the weight ratio of 3: 2: 5 preparing raw material scraps by batching, layering the raw material scraps to form a layer with the thickness of 3-5 cm, and drying the layer by hot air; wherein the temperature of the hot air is 38-42 ℃, and the drying time is 36-48 hours;

step S2, mixing the dried raw material scraps with a zinc chloride solution as an activating agent, and stirring by using a stirrer to form a primary material; wherein the baume degree of the zinc chloride solution is 60-64 DEG Be/60 ℃, and the pH value is 2.8-3.0; stirring for 20-30 minutes; the mixing ratio of the zinc chloride solution to the raw material scraps is 4.8-5.0: 1;

step S3, carbonizing the primary material, wherein the carbonization temperature is 120-200 ℃; continuously heating and activating, wherein the activation temperature is 520-550 ℃, the heating is constant temperature during activation, and the heating speed is 10 ℃/min, so as to prepare an activated carbon initial sample;

and step S4, adding industrial hydrochloric acid, separating zinc chloride in the activated carbon sample through a filtering and extracting device, washing with water, and drying with cold air to obtain the activated carbon.

2. The method for preparing activated carbon according to claim 1, wherein the raw material chips have a particle size of less than 35-38 mesh in step S1.

3. The method for preparing activated carbon according to claim 1, wherein the zinc chloride solution has a baume degree of 62 ° B/60 ℃ and a pH of 3.0 in step S2.

4. The method for preparing activated carbon according to claim 1, wherein in step S2, the mixing ratio of the zinc chloride solution to the raw material scraps is 5: 1.

5. the method for preparing activated carbon according to claim 1, wherein the cold air drying time in step S4 is 24 to 36 hours.

6. The method of claim 1, wherein in step S1, the hard broad-leaved wood is cyclobalanopsis glauca or quercus acutissima, the soft broad-leaved wood is poplar or willow, and the coniferous wood is masson pine.

[ technical field ] A method for producing a semiconductor device

The invention belongs to the technical field of carbon processing, and particularly relates to a preparation method of activated carbon.

[ background of the invention ]

[ summary of the invention ]

The invention aims to provide a preparation method of activated carbon, which has low production cost and good adsorption performance of the prepared activated carbon.

In order to solve the technical problems, the invention provides a preparation method of activated carbon, which comprises the following steps:

step S1, mixing hard broad-leaved wood, soft broad-leaved wood and coniferous wood according to the weight ratio of 3: 2: 5 preparing raw material scraps by batching, layering the raw material scraps to form a layer with the thickness of 3-5 cm, and drying the layer by hot air; wherein the temperature of the hot air is 38-42 ℃, and the drying time is 36-48 hours.

Step S2, mixing the dried raw material scraps with a zinc chloride solution as an activating agent, and stirring by using a stirrer to form a primary material; wherein the baume degree of the zinc chloride solution is 60-64 DEG Be/60 ℃, and the pH value is 2.8-3.0; stirring for 20-30 minutes; the mixing ratio of the zinc chloride solution to the raw material scraps is 4.8-5.0: 1.

step S3, carbonizing the primary material, wherein the carbonization temperature is 120-200 ℃; and continuously heating for activation, wherein the activation temperature is 520-550 ℃, the heating is constant temperature during activation, and the heating speed is 10 ℃/min, so that the activated carbon initial sample is prepared.

And step S4, adding industrial hydrochloric acid, separating zinc chloride in the activated carbon sample through a filtering and extracting device, washing with water, and drying with cold air to obtain the activated carbon.

Preferably, in step S1, the particle size of the raw material chips is less than 35 to 38 mesh.

Preferably, in step S2, the zinc chloride solution has a Baume of 62 DEG Be/60 ℃ and a pH of 3.0.

Preferably, in step S2, the mixing ratio of the zinc chloride solution to the raw material chips is 5: 1.

preferably, the cold air drying time in the step S4 is 24 to 36 hours.

Preferably, in step S1, the hard broad-leaved wood is cyclobalanopsis glauca or quercus acutissima, the soft broad-leaved wood is poplar or willow, and the coniferous wood is masson pine.

Compared with the prior art, the preparation method of the activated carbon uses three different types of leaf material ingredients to prepare the raw material scraps, the zinc chloride solution is used as the activating agent, the mixing ratio of the zinc chloride solution and the raw material scraps is controlled, the used zinc chloride solution can separate and recycle zinc chloride, the production cost is effectively reduced, the adsorption capacity of the activated carbon prepared by using the two different types of leaf materials as the raw material scraps is increased by 60-65% compared with that of the activated carbon prepared by using a common single leaf material, and the adsorption performance of the prepared activated carbon is effectively improved.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a flow chart of a method for preparing activated carbon according to an embodiment of the present invention.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a method for preparing activated carbon, which comprises the following steps:

step S1, mixing hard broad-leaved wood, soft broad-leaved wood and coniferous wood according to the weight ratio of 3: 2: 5 preparing raw material scraps by batching, layering the raw material scraps to form a layer with the thickness of 3-5 cm, and drying the layer by hot air; wherein the temperature of the hot air is 38-42 ℃, and the drying time is 36-48 hours.

In step S1, the particle size of the raw material chips is smaller than 35 to 38 mesh.

Wherein the hard broad-leaved wood is cyclobalanopsis glauca or quercus acutissima, the soft broad-leaved wood is poplar or willow, and the coniferous wood is masson pine.

Step S2, mixing the dried raw material scraps with a zinc chloride solution as an activating agent, and stirring by using a stirrer to form a primary material; wherein the baume degree of the zinc chloride solution is 60-64 DEG Be/60 ℃, and the pH value is 2.8-3.0; stirring for 20-30 minutes; the mixing ratio of the zinc chloride solution to the raw material scraps is 4.8-5.0: 1.

in step S2, the Baume degree of the zinc chloride solution is 62 DEG Be/60 ℃, and the pH value is 3.0. Preferably, the mixing ratio of the zinc chloride solution to the raw material scraps is 5: 1.

step S3, carbonizing the primary material, wherein the carbonization temperature is 120-200 ℃; and continuously heating for activation, wherein the activation temperature is 520-550 ℃, the heating is constant temperature during activation, and the heating speed is 10 ℃/min, so that the activated carbon initial sample is prepared.

And step S4, adding industrial hydrochloric acid, separating zinc chloride in the activated carbon sample through a filtering and extracting device, washing with water, and drying with cold air to obtain the activated carbon.

In step S4, the cold air drying time is 24 to 36 hours.

Compared with the prior art, the preparation method of the activated carbon uses three different types of leaf material ingredients to prepare the raw material scraps, the zinc chloride solution is used as the activating agent, the mixing ratio of the zinc chloride solution and the raw material scraps is controlled, the used zinc chloride solution can separate and recycle zinc chloride, the production cost is effectively reduced, the adsorption capacity of the activated carbon prepared by using the two different types of leaf materials as the raw material scraps is increased by 60-65% compared with that of the activated carbon prepared by using a common single leaf material, and the adsorption performance of the prepared activated carbon is effectively improved.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.