Low energy one-step method for preparing asphalt balls

Abstract

The invention relates to a low energy one-step method for preparing asphalt balls. The method comprises steps of directly adding high softening point asphalt, naphthaline, dispersing agent and water into a normal pressure reaction kettle according to weight ratio of 1:(0.35-0.5):(0.01-0.3):(20-40), rising temperature up to 75-95DEG C at stirring rate of 200-500rpm, keeping warm for 1-5 hours at the temperature, then separating solid and liquid directly without cooling down so as to obtain the asphalt balls. The one-step method has the advantages of directly preparing the asphalt balls by one step, having low equipment cost due to the use of normal pressure reaction kettle, and having high safety and low energy consumption.

Description

technical field [0001] The invention belongs to a technology for preparing asphalt balls, in particular to a technology for preparing asphalt balls by one-step emulsification. Background technique [0002] Pitch-based spherical activated carbon is a high-performance activated carbon that is used in many fields. The precursor prepared by it is asphalt, which is further turned into asphalt balls to prepare spherical activated carbon. Therefore, the preparation of asphalt balls is necessary. [0003] There are many patents for preparing spherical activated carbon with asphalt as the precursor. In the Chinese invention patent 201010143602 "a method for preparing asphalt spheres", the viscosity reducer is melted in advance and mixed with high softening point asphalt to obtain modulated asphalt, and then the asphalt enters the Under the liquid surface of the suspension medium, it is heated and stirred into balls, that is, at least 2 steps are used to obtain asphalt balls; Chines...

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Problems solved by technology

[0003] There are many patents for preparing spherical activated carbon with asphalt as the precursor. In the Chinese invention patent 201010143602 "a method for preparing asphalt spheres", the viscosity reducer is melted in advance and mixed with high softening point asphalt to obtain modulated asphalt, and then the asphalt enters the Under the liquid surface of the suspension medium, it is heated and stirred into balls, that is, at least 2 steps are used to obtain asphalt balls; Chinese invention patent 201210317727 "Preparation method of pitch-based spherical activated carbon with low energy consumption" uses curing agent and high softening point pitch first After mixing evenly, add it to the polyvinyl alcohol solution at 80-95°C and stir, then transfer it to a hydrothermal kettle and react at 120-160°C for 3-6.5 hours to obtain asphalt balls; other Chinese invention patents such as patent 03178572 "rich Method for preparing pitch-based spherical activated carbon with mesopores", patent 200410100531 "method for preparing spherical activated carbon", patent 200610127621 "method for preparing spherical activated carbon with low heavy metal content", patent 200810035853 "a nitrogen-containing pitch-based spherical The preparation method of activated carbon" and the patent 201210317727 "low-energy preparation method of asphalt-based spherical activated carbon" all adopt more than 2 steps to obtain asphalt balls, and the temperature for preparing asphalt balls is above 100 ℃, and the energy consumption is relatively low. High, requires autoclave