Tseng Chang Tsai, Hsin Chung Hu, Kun Yung TsaiChinese Petroleum Corp.Chiayi, Taiwan Fu Sou JengChinese Petroleum Corp.Kaohsiung, Taiwan A new method of calculating catalyst circulation rate on line improved the operating efficiency of the moving bed transalkylation unit at Chinese Petroleum Corp's refinery at Kaohsiung, Taiwan. The improved measurements increased toluene conversion by 3 wt %/pass and reduced energy usage by about $220,000/year in the xylene production unit. AROMATICS MARKETS The p xylene market has grown rapidly in many parts of world, especially East Asia. Demand in Taiwan has almost d...

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