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. 20, 2003
Filed:
Mar. 27, 2001
Sai Prasad Potharaju Seetharamanjaneya, Hyderabad, IN;
Kondapuram Vijaya Raghavan, Hyderabad, IN;
Panja Kanta Rao, Hyderabad, IN;
Shivanand Janardan Kulkarni, Hyderabad, IN;
Katabathini Narasimha Rao, Hyderabad, IN;
Rajesh Gopinath, Hyderabad, IN;
Suresh Farsinavis, Hyderabad, IN;
Harshadas Mitaram Meshram, Hyderabad, IN;
Council of Scientific and Industrial Research, New Delhi, IN;
Abstract
The present invention relates to enhancement of the cycle life of a zinc chromium based catalyst used in the synthesis of 2-methylpyrazine by increasing the reaction temperature step-wise, starting from a low temperature, while monitoring the levels of total conversion and selectivity towards pyrazine. The catalyst can be regenerated after each cycle of use without substantial loss of activity.