Patent ID: 8840817
Filing Date: 2014-09-23
Classification: B01J,C01B

Abstract:
1. A preparation method for asphalt-based spherical activated carbon which requires no infusibilization process, characterized in that it is specifically carried out in accordance with the following steps: Step 1: Preparing asphalt powder Selecting coal tar asphalt as a base material and placing it into a melting device; introducing compressed air of 0.1 MPa-0.5 MPa into the device and stirring the base material until a melting temperature of 280° C.-350° C. is reached; continuing for 2-8 hours until the base material has a softening point of 200° C.-260° C.; after cooling down, pulverizing the base material to obtain asphalt powder; Step 2: Shaping asphalt particles into spheres Obtaining 34%-79% by mass of carbon powder, 1%-10% by mass of binder, and 20%-65% by mass of the asphalt powder obtained in Step 1 wherein mass percentage of the carbon powder, the binder and the asphalt powder sums up to 100%; and then forming spherical particles with a diameter of 0.5 mm-5 mm by subjecting the carbon powder, the binder and the asphalt powder into a pelletizer at room temperature to obtain spherical particles of asphalt; Step 3: Carbonizing spherical particles of asphalt Introducing the spherical particles of asphalt obtained in Step 2 directly into an asphalt carbonization furnace for carbonization at a temperature of 600° C.-900° C. under protection of an inert gas to obtain asphalt spherical carbon; Step 4: Activating asphalt spherical carbon Subjecting asphalt spherical carbon obtained in Step 3 to activation treatment to obtain asphalt spherical activated carbon.