The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 02, 2006
Filed:
Feb. 24, 1999
Raghunath Vitthal Chaudhari, Maharashtra, IN;
Rengaswamy Jaganathan, Maharashtra, IN;
Sopan Tukaram Chaudhari, Maharashtra, IN;
Chandrashekhar Vasant Rode, Maharashtra, IN;
Raghunath Vitthal Chaudhari, Maharashtra, IN;
Rengaswamy Jaganathan, Maharashtra, IN;
Sopan Tukaram Chaudhari, Maharashtra, IN;
Chandrashekhar Vasant Rode, Maharashtra, IN;
Council of Scientific and Industrial Research, New Delhi, IN;
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.