Method for purifying C6-C10 mixed aromatic hydrocarbons

The invention relates to a method for purifying C6-C10 mixed aromatic hydrocarbons, which comprises the following steps of: enabling the C6-C10 mixed aromatic hydrocarbons to pass through a simulatedmoving bed device, and adsorbing and separating aromatic hydrocarbon components in the raw materials to obtain a high-purity C6-C10 aromatic hydrocarbon component and a high-purity non-aromatic hydrocarbon component. Adsorption columns of the simulated moving bed are connected end to end and side by side through multi-position valves and are connected through a circulating pump to form a closed loop, flow of the four areas is periodically regulated and controlled through program switching of the multi-position valves to enable adsorbent bed layers to move relatively, separation, recovery and cyclic utilization of a desorbent can be achieved through a rectifying tower, and finally aromatic hydrocarbon and non-aromatic hydrocarbon are obtained. According to the method, the mixed aromatic hydrocarbon is adsorbed and