Process for the disproportionation and transalkylation of...

Chemistry of hydrocarbon compounds – Plural parallel syntheses – With blending of products from two parallel reactions

Reexamination Certificate

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Details

C585S304000, C585S300000, C585S475000, C585S470000

Reexamination Certificate

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07109389

ABSTRACT:
A process for the disproportionation and transalkylation of toluene and the heavy aromatics comprises: subjecting a first stream of toluene, and a stream enriched in aromatics of nine carbon atoms to toluene disproportionation and transalkylation reactions in the presence of hydrogen in a first reaction zone to produce a first product mixture comprising benzene, aromatics of eight carbon atoms and heavy aromatics of ten and more carbon atoms; subjecting a second stream of toluene, and a stream enriched in heavy aromatics of ten and more carbon atoms to transalkylation reaction in the presence of hydrogen in a second reaction zone to produce a second product mixture comprising benzene, aromatics of eight carbon atoms and aromatics of nine carbon atoms; and isolating and recovering benzene and aromatics of eight carbon atoms from the first and second product mixtures.

REFERENCES:
patent: 4341914 (1982-07-01), Berger
patent: 1235948 (1999-11-01), None
patent: 1340484 (2000-03-01), None
The English version of CN 1340484A.

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