Preparation method of carbon black-coal pitch composite spherical activated carbon

Abstract

The invention relates to a preparation method of carbon black-coal pitch composite spherical activated carbon. The method comprises the following steps: performing Soxhlet extraction on medium temperature coal pitch by using a pyridine solution to obtain a pitch pyridine solution, adding carbon black, performing ultrasonic dispersion, adding the obtained solution to a polyvinyl alcohol suspension,and heating, filtering and drying the obtained solution to obtain carbon black-coal pitch composite spheres; and performing non-melting, carbonization and activation treatment on the carbon black-coal pitch composite spheres to obtain the carbon black-coal pitch composite spherical activated carbon. The method realizes the preparation of the spherical activated carbon from the medium temperaturecoal pitch, improves the coking value of the pitch and the yield after the non-melting and the carbonization, and facilitates the improvement of the specific surface area of the spherical activated carbon.

Description

Technical field [0001] The invention relates to the technical field of spherical activated carbon (SAC) preparation, in particular to a method for preparing carbon black-coal pitch composite spherical activated carbon. Background technique [0002] Pitch-based spherical activated carbon is one of the high value-added products of asphalt. Due to its special shape and structure, it has rich pore structure, large specific surface area, good mechanical properties, uniform packing density and good physiological compatibility. Etc., making it widely used in medicine, environmental protection, catalysis, military, agriculture and other fields. [0003] The raw materials for the preparation of activated carbon mainly include coal, petroleum coke, asphalt, wood, and a large number of industrial and agricultural organic by-products. Among them, asphalt has abundant resources, low price, low ash content, high carbonization yield, high mechanical strength, and large adsorption capacity. And t...

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Problems solved by technology

Liu Lihua of Northeast Forestry University's master's thesis "Preparation and Adsorption Properties of Spherical Pitch Activated Carbon" used this method to prepare asphalt balls. The yield of asphalt balls with a particle size of 20-36 mesh was 61.09%; The yield of asphalt pellets in the range of 10-20 mesh is 37.14%, while the yield of asphalt pellets smaller than 10 mesh is 0.24%, and the yield of pitch pellets larger than 36 mesh is only 1.53%. At present, there is no good technology to Preparation of micron-sized asphalt balls with uniform particle size

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