Process for selective disproportionation of toluene and disproportionation and transalkylation of toluene and C9+ aromatics
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United States of America Patent
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Aug 10, 2004
Grant Date -
Jul 10, 2003
app pub date -
Oct 22, 2002
filing date -
Oct 22, 2001
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Abstract
The present invention relates to a process for the selective disproportionation of toluene and the disproportionation and transalkylation of toluene and C.sub.9.sup.+ aromatics to mainly solve the problems in the prior arts of the great amount of recycle stream, high energy consumption or harsh requirement for the reaction feedstocks. The present invention has better solved these problems by the technical solution using a process for selective disproportionation of toluene to produce mixed xylenes containing a high concentration of p-xylene, and subsequent disproportionation and transalkylation of C.sub.9.sup.+ aromatics and toluene to produce benzene and the mixed xylenes which are in the thermodynamic equilibrium. The process is applicable to the industrial production.
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