Process for the selective reduction to the content of benzene an

Details Process for the selective reduction to the content of benzene an Process for the selective reduction to the content of benzene an

1996-12-27

1998-10-06

Griffin, Walter D.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Hydrogenation

208144, 585264, 585265, C01G 4500

Patent

active

058172270

ABSTRACT:
The invention is concerned with a process for treating a charge of which the major part is constituted by hydrocarbons comprising at least 5 carbon atoms per molecule and comprising at least one unsaturated compound comprising at the most six carbon atoms per molecule including benzene, such that said charge is treated in a distillation zone, comprising a drainage zone and a stripping zone, associated with a hydrogenation reaction zone, comprising at least one catalytic bed, in which hydrogenation is carried out of at least part of the unsaturated compounds comprising at the most six carbon atoms per molecule and contained in the charge, the charge of said reaction zone being removed at the height of a removal level and representing at least a part of the liquid flowing in the distillation zone, the effluent of the reaction zone being at least partly reintroduced into the distillation zone, in such a way as to ensure the continuity of the distillation operation and in such a way as to remove from the top of the distillation zone an effluent with a very depleted content of unsaturated compounds comprising at the most 6 carbon atoms per molecule, and at the bottom of the distillation zone an effluent with a depleted content of unsaturated compounds comprising at the most six carbon atoms per molecule, said process being characterized in that the hydrogenation zone is at least partly outside the distillation zone.

REFERENCES:
patent: 4469907 (1984-09-01), Araki et al.
patent: 4503265 (1985-03-01), Schleppinghoff et al.
patent: 4648959 (1987-03-01), Herber et al.
patent: 4960960 (1990-10-01), Harrison et al.
patent: 5177283 (1993-01-01), Ward
patent: 5210348 (1993-05-01), Hsieh et al.

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