Production of alkyl aromatic hydrocarbons

Details Production of alkyl aromatic hydrocarbons Production of alkyl aromatic hydrocarbons

1975-01-30

1976-05-18

Levine, Herbert

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

208 79, 208 92, 208111, 260672T, 260674A, C07G 310, C10G 3710

Patent

active

039576213

ABSTRACT:
Alkyl aromatic hydrocarbons useful as chemical raw material, solvents and the like are provided in high purity by hydrocracking of a fraction rich in alkyl aromatics and lean in aliphatic hydrocarbons over a particular zeolite catalyst associated with a hydrogenation/dehydrogenation component. The charge stock is characterized by substantial absence of benzene and lighter hydrocarbons. The technique is particularly well suited to production of maximum xylenes from a fraction containing higher boiling and lower boiling alkyl aromatics. Toluene derived from the hydrocracking reaction is disproportionated in the presence of hydrogen over a zeolite catalyst and the disproportionation effluent is processed through the same recovery train as the hydrocracked product.

REFERENCES:
patent: 3597491 (1971-08-01), Kovach et al.
patent: 3790471 (1974-02-01), Argauer et al.
patent: 3804746 (1974-04-01), Chu
patent: 3856872 (1974-12-01), Morrison

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