(589e) Sulfuric Acid Catalyzed Isobutane-Butene Alkylation Promoted with Ionic Liquids or Trifluoroethanol

Authors: 
Ren, H. - Presenter, Institute of Process Engineering, Chinese Academy of Sciences
Zhao, G. - Presenter, Institute of Process Engineering, Chinese Academy of Sciences


Sulfuric acid
catalyzed isobutane-butene alkylation promoted with ionicliquids or
trifluoroethanol

Hailing
Renab, Guoying Zhaoa*, Peng Cuiab,
Jun Huangb
,Suojiang
Zhanga*

a
Institute of Process
Engineering, Chinese Academy of Sciences, P. O. Box 353,  Beijing, 100190,
China

Fax : +86 10 82627080

b
State Key Laboratory of
Materials-Oriented Chemical Engineering, College of Chemistry and Chemical
Engineering, Nanjing University of Technology, Nanjing,  210009, China

Fax: +86 25
83172263

Abstract

Small
amounts of ionic liquids or trifluoroethanol(TFEA), have been studied as promoters
for sulfuric acid catalyzed alkylation of isobutane/butene. Long-term studies
up to 40+ recycles indicated that the working life of H2SO4
with suitable ionic liquid-based promoter was prolonged at least three times
that of sulfuric acid. New catalytic active species formed in-situ by the above
promoter and H2SO4 was detected by NMR and ESI-MS analytic
technology. In addition, the promoters are believed to lower the interfacial tension
of hydrocarbon feeds/sulfuric acids dispersion and thus improve the quality of
alkylate.

 

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