Process for the preparation of copper chromite catalyst

Details Process for the preparation of copper chromite catalyst Process for the preparation of copper chromite catalyst

Filed on

2006-05-02

Date issued

2006-05-02

Examiner

Griffin, Steven P. (Department: 1754)

Patent Class

Catalyst, solid sorbent, or support therefor: product or process

SubClass

Catalyst or precursor therefor

SubSubClass

Metal, metal oxide or metal hydroxide

Other Related Categories

C502S305000, C502S318000, C502S319000, C502S320000, C502S323000, C502S345000, C502S346000, C502S355000

Type

Reexamination Certificate

Status

active

Patent number

07037877

Description

ABSTRACT:
The present invention provides a process for the preparation of an improved copper chromite catalyst for the hydrogenation of diethyl maleate to tetrahydrofuran with very high selectivity. This invention particularly relates to a process for the preparation of an improved copper chromite catalyst with specific composition and physical properties containing copper, chromium, zinc and aluminium as catalyst components in order to achieve selective production of tetrahydrofuran via single step hydrogenation of diethyl maleate. The calcination procedure has also been described to achieve the best activity. The catalyst has a life of more than 630 hours with constant activity. The used catalyst can also be regenerated to match the original hydrogenation activity.

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patent: 5767326 (1998-06-01), Kleemiss et al.
patent: 5820749 (1998-10-01), Haluska et al.

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