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Carbon nano particles and preparation method thereof

A technology of carbon nanoparticles and fractions, applied in the direction of nano-carbon, etc., can solve the problems of unavailable raw materials, poor product appearance, complex preparation process of carbon nanoparticles, etc., and achieve low price, good appearance, and effective utilization Effect

Active Publication Date: 2018-07-31
海若斯(北京)环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention proposes a carbon nanoparticle and its preparation method, which solves technical problems such as complex preparation process of carbon nanoparticle, poor product appearance, and difficult availability of raw materials.

Method used

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  • Carbon nano particles and preparation method thereof
  • Carbon nano particles and preparation method thereof

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preparation example Construction

[0029] An embodiment of the present invention provides a method for preparing carbon nanoparticles, comprising the following steps:

[0030] Step (1): After the biomass tar is centrifuged, the upper liquid is filtered to obtain a filtrate, and the filtrate is distilled to obtain a fraction;

[0031] Step (2): Under constant temperature and stirring reaction conditions, continuously add the fraction obtained in step (1) to concentrated sulfuric acid, continue stirring at constant temperature after the addition, then stop heating and cool to room temperature;

[0032] Step (3): The reaction product obtained in step (2) is repeatedly washed with water and organic washing liquid until neutral and then precipitated, and after centrifugation, the solid-liquid mixture in the lower layer is taken out;

[0033] Step (4): drying the solid-liquid mixture in the lower layer obtained in step (3) through critical point drying to obtain carbon nanoparticles.

[0034] The method for preparin...

Embodiment 1

[0049] Embodiment 1 A kind of preparation method of carbon nanoparticle, comprises the steps:

[0050] Step (1): Take the wood tar as it is and place it in a high-speed centrifuge, process it at a speed of 4000r / min for 30 minutes, pass the upper liquid through an 80-mesh filter cloth to remove coarse impurities to obtain a filtrate, add zeolite to the filtrate and distill it at 110-350°C Fractions within range;

[0051] Step (2): Measure 80ml fraction and 1000ml concentrated sulfuric acid respectively according to the volume ratio of fraction and concentrated sulfuric acid as 2:25, keep constant temperature reaction condition 160°C, add fraction to concentrated sulfuric acid at a speed of 2ml / min, and keep stirring , After the addition is completed, stir and react at a constant temperature for 10 minutes, then stop heating, and naturally cool to room temperature;

[0052] Step (3): Wash with deionized water until neutral, then wash with absolute ethanol three times, precipitat...

Embodiment 2

[0055] Embodiment 2 A kind of preparation method of carbon nanoparticle, comprises the steps:

[0056] Step (1): Take the biomass tar as it is and place it in a high-speed centrifuge, process it at a speed of 3500r / min for 30 minutes, use a 100-mesh filter cloth to remove coarse impurities to obtain a filtrate, add zeolite to the filtrate and distill it to obtain a distillation range of 110-200°C range fractions;

[0057] Step (2): Measure 80ml fraction and 2000ml concentrated sulfuric acid at a volume ratio of 1:25, keep the constant temperature reaction condition at 150°C, add the fraction to the concentrated sulfuric acid at a rate of 2ml / min, and keep stirring. After the addition is completed, stir and react at constant temperature 20min, then stop heating and cool down to room temperature naturally;

[0058] Step (3): Wash with deionized water until neutral, then wash with absolute ethanol three times, precipitate, centrifuge, and remove the solid-liquid mixture in the l...

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Abstract

The invention provides carbon nano particles and a preparation method thereof and belongs to the technical field of nanometer materials. The preparation method of the carbon nano particles comprises the following steps that (1) biomass tar is subjected to centrifugal separation, supernatant liquid is filtered with filter cloth to obtain a filtrate, and the filtrate is distilled to acquire a fraction; (2) the fraction obtained in the step (1) is continuously put into concentrated sulfuric acid under the condition of constant-temperature stirring reaction, constant-temperature stirring is performed after charging is finished, then heating is stopped, and cooling is performed to room temperature; (3) a reaction product obtained in the step (2) is repeatedly washed with water and an organic liquid until the reaction product is neutral, precipitation is performed, and a lower solid-liquid mixture is taken out after centrifugal separation is performed; and (4) the lower solid-liquid mixtureobtained in the step (3) is dried at a critical point to obtain the carbon nano particles. The preparation method of the carbon nano particles provided by the invention is simple in technology, good in the form of a product and available in raw material and has environment-friendly value.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a carbon nanoparticle and a preparation method thereof. Background technique [0002] In today's society, the reserves of coal, oil, and natural gas are decreasing day by day, and the environmental pollution is getting worse. It is of great strategic significance to vigorously develop the utilization and research of renewable natural resources to replace traditional petroleum-based polymer materials. [0003] Biomass energy, as a renewable resource, is attracting more and more attention due to its unique properties. Through thermochemical conversion (pyrolysis or gasification), biomass can be converted into gas, liquid or solid, which can be used to generate heat, electricity or basic chemical raw materials required by industry. However, during the thermochemical conversion of biomass, tar (tar)-like by-products are produced, namely biomass tar, which needs to be ...

Claims

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Application Information

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IPC IPC(8): C01B32/15
CPCC01B32/15
Inventor 袁衍超林青山李坤鹏
Owner 海若斯(北京)环境科技有限公司
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