公开(公告)号：EP1373226B1

公开(公告)日：2007-07-04

申请号：EP01934298.9

申请日：2001-03-30

Applicant: COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH

Inventor： POTHARAJU SEETHARAMANJANEYA, Sai Prasad ,  RAGHAVAN, Kondapuram Vijaya ,  RAO, Panja Kanta ,  KULKARNI, Shivanand Janardan ,  RAO, Katabathini Narasimha ,  GAPINATH, Rajesh ,  FARSINAVIS, Suresh ,  MESHRAM, Harshadas Mitaram

IPC: C07D241/12 ,  B01J23/652 ,  B01J23/60

CPC classification number: B01J8/0285 ,  B01J23/06 ,  B01J23/26 ,  B01J23/60 ,  B01J23/6522 ,  B01J23/92 ,  B01J23/96 ,  B01J27/053 ,  B01J37/0201 ,  B01J38/06 ,  B01J38/10 ,  B01J38/12 ,  C07D241/12 ,  Y02P20/584

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 regenrated after each cycle of use without substantial loss of activity.