PROCEDURE FOR PREPARING ETHYLBENZENE USING LIQUID PHASE RENTAL AND STEAM PHASE TRANSALQUILATION.

摘要

THE PRESENT INVENTION, REFERS TO A PROCEDURE OF PREPARATION OF ETHYLBENZENE USING LIQUID PHASE RENTAL AND STEAM PHASE TRANSALKYLATION. THE LIQUID PHASE RENTAL REACTION MAY BE CATALIZED BY A SOLID ACID OXIDE LIKE MCM-22, MCM-49 AND MCM-56. THE STEAM PHASE TRANSALQUILATION CAN BE CATALIZED BY A ZEOLITE OF MEDIUM Pore SIZE AS ZSM-5. THE PROCEDURE CAN BE CARRIED OUT ON A CONTINUOUS BASIS BY THE CONTINUOUS INTRODUCTION OF A CONTRIBUTION OF NEW BENZENE CONTAINING AT LEAST 500 PPM OF NON-BENZENE HYDROCARBON IMPURITIES. THE COMBINED ETHYLBENZENE PRODUCT FROM SUCH ALKYLATION AND TRANSALKYLATION REACTIONS PRESENTS VERY LOW LEVELS OF IMPURITIES INCLUDING XYLENE, HYDROCARBONS WITH 7 OR LESS ATOMS OF CARBON AND HYDROCARBONS WITH 9 OR MORE CARBON ATOMS.