Method for producing active carbon by using traditional Chinese medicine dregs

Abstract

The invention discloses a method for producing active carbon by using traditional Chinese medicine dregs as raw materials and zinc chloride as an activator. The method comprises the following steps: firstly, drying the raw materials of the traditional Chinese medicine dregs until the moisture content is less than 15 percent, performing mechanical pulverization and sieving the materials through a 40-mesh sieve; secondly, soaking the dregs after pretreatment in 3-7 mol / l zinc chloride solution for 24 hours, wherein the soaking ratio, namely the ratio of the mass of the dregs to the mass of the zinc chloride solution is 1:1-1:2; thirdly, putting the traditional Chinese medicine dregs soaked by the zinc chloride solution into a pipe furnace, introducing an inert gas (such as nitrogen or carbon dioxide), raising the temperature to between 400 and 600 DEG C, and performing one-step carbonization (carbonization and activation simultaneously) for 0.5 to 1.5 hours; fourthly, cooling the activated carbides to room temperature, washing the carbides with 3 mol per liter hydrochloric acid solution, and rinsing the carbides with 60 DEG C water until the carbides are neutral; and finally, drying the products after the rinsing, and grinding the products to obtain the active carbon finished products.

Description

technical field [0001] The invention relates to a method for producing activated carbon by using traditional Chinese medicine dregs as raw materials and using zinc chloride as an activator. Background technique [0002] Activated carbon is a kind of micro-quality carbon material made of carbonaceous materials with black appearance, developed internal void structure, large specific surface area and strong adsorption capacity. It is a commonly used adsorbent, catalyst or catalyst carrier, widely used in almost all scientific research and national economic sectors such as chemistry, biotechnology, food, medicine, national defense, environmental protection, energy, and people's daily life. The surface is getting wider and wider, and the demand is growing steadily year by year. [0003] The core part of activated carbon technology is the carbon-containing raw materials used and the corresponding preparation process. [0004] The raw materials for preparing activated carbon incl...

AI Technical Summary

Problems solved by technology

At present, the treatment methods of traditional Chinese medicine dregs are mainly divided into two categories. One is to pile up or bury them as waste, which takes up a lot of land, and the dregs of traditional Chinese medicine are easy to cause pollution to the surrounding environment due to rainwater, especially in some places in my country. Areas with shallow groundwater levels have a more serious impact on water quality; the second is to use boilers to incinerate traditional Chinese medicine dregs after drying, but after incineration, a large amount of pollutants such as smoke and carbon dioxide will be produced, which will also bring considerable damage to the atmospheric environment. pollution