Acidity Characterization and Acid Catalysis Performance of Titanium Silicalite (TS-1)

Chinese Journal of Catalysis ›› 2009, Vol. 30 ›› Issue (6): 482-484.

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Acidity Characterization and Acid Catalysis Performance of Titanium Silicalite (TS-1)

LIU Wenhuan1, GUO Peng1, SU Ji1, HU Jia1, WANG Yanmei1, LIU Na2, GUO Hongchen1,*

1State Key Laboratory of Fine Chemicals, Department of Catalytic Chemistry and Engineering,Dalian University of Technology, Dalian 116012, Liaoning, China; 2School of Chemical and Material, Dalian Polytechnic University, Dalian 116034, Liaoning, China

Received:2009-06-25 Online:2009-06-25 Published:2013-03-22

Abstract

Abstract: Hammett indicator titration was used for the characterization of TS-1 acidity. The acid strength of the TS-1 studied was H0 = +3.3 – +4.8. In the epoxidation of propylene, only the stronger acid sites can trigger the side-reaction of propylene oxide with methanol. The weaker acid sites, although very weak, are active and selective to convert ethyldiamine to piperazine and 1,4-diazabicyclo- [2.2.2]octane.

Key words: TS-1, acidity, Hammett indicator, etherification, cycloamination

LIU Wenhuan;GUO Peng;SU Ji;HU Jia;WANG Yanmei;LIU Na;GUO Hongchen;*. Acidity Characterization and Acid Catalysis Performance of Titanium Silicalite (TS-1)[J]. Chinese Journal of Catalysis, 2009, 30(6): 482-484.

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Acidity Characterization and Acid Catalysis Performance of Titanium Silicalite (TS-1)

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