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China 's abundant coal resources , a large amount of coking benzene produced in the coking process . Coking Benzene is an important source of fine chemical intermediates , benzene as one of important chemical raw materials , coking benzene by refining derived . China 's coking benzene rich in natural resources , and contains various impurities , particularly sulfur compounds such as thiophene (mass fraction 0.2% 1 .6%) in the reaction process , sulfide easy to make catalyst poisoning , emissions , pollution to the environment , limiting its further processing and utilization . Directly used in chemical synthesis , it is necessary to pre- desulfurization refining , especially the removal of which higher levels of thiophene . This paper summarizes several methods of coking benzene desulfurization process , then details the use of FC acylation reaction separation of benzene and thiophene . 2 - acetyithiophene with high added value , is widely used in the pharmaceutical field . Experiment , the conversion of thiophene to 2 - acetyl - thiophene , to increase the difference in boiling point of benzene and sulfide , so that the product is easy to separate . In this paper, the various solid acid catalyst instead of the traditional environment more polluting liquid acid ( AlCl 3 BF 3 < / sub > H 2 SO < sub> 4 , etc.) , the acylation reaction to catalyze thiophene during the experiment tested several solid acid , wherein the conversion rate and selectivity is the highest Mont -K10 . Meanwhile, the life of Mont-K10 catalyst reaction test , the results indicate that the stability and regeneration performance were good . Finally, using in situ Fourier transform infrared to measure the surface acidity of Mont-K10 , solid acid-catalyzed acylation reaction mechanism .
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