Process for the production of gamma butyrolactone THF in predete

Details Process for the production of gamma butyrolactone THF in predete Process for the production of gamma butyrolactone THF in predete

1991-07-25

1992-09-22

Ivy, C. Warren

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549326, 549510, C07D30726

Patent

active

051498367

ABSTRACT:
This invention provides a vapor phase process for the production of gamma-butyrolactone and tetrahydrofuran in a predetermined ratio by the steps of: hydrogenating a vapor mixture of maleic anhydride and excess hydrogen over a first bed of a Cu-Zn-Al catalyst, and directly contacting the crude reactor effluent therefrom with hydrogen over a second bed of Cu-Zn-Cr catalyst during a predetermined contact time and at a defined temperature, using selected amounts of catalyst in each bed.

REFERENCES:
patent: 3065243 (1962-11-01), Dunlop
patent: 3580930 (1971-05-01), Miya et al.
patent: 3829448 (1974-08-01), Kanetaka et al.
patent: 3853922 (1974-12-01), Yamaguchi et al.
patent: 3894054 (1975-07-01), Miya
patent: 4001282 (1977-01-01), Miller
patent: 4006165 (1977-02-01), Michalczyk et al.
patent: 4048196 (1977-09-01), Broecker et al.
patent: 4772729 (1988-09-01), Rao
patent: 5055599 (1991-10-01), Budge

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