公开(公告)号：US3767772A

公开(公告)日：1973-10-23

申请号：US3767772D

申请日：1971-10-18

Applicant: STAMICARBON

Inventor： SCHOLTEN J ,  SCHEIJEN W ,  GEUS J ,  NOBEL A

IPC: C01B21/26

CPC classification number: C01B21/265 ,  C01B21/26

Abstract: AN IMPROVED PROCESS FOR THE PREPARATION OF NITROGEN MONOXIDE FROM AMMONIA AND MOLECULAR OXGEN AT AN ELEVATED TEMPERATURE IN THE PRESENCE OF A CATALYST SYSTEM CONTAINING COBALT OXIDE IS DISCLOSED WHEREIN THE EFFICIENCY OF THE CATALYST IS PERIODICALLY RESTORED BY INTERMITTENTLY DECREASING THE AMMONIA CONTENT OF THE GAS MIXTURE SUPPLIED TO THE REACTOR BY FROM ONE TO TEN PERC ENT BY VOLUME, EACH INTERMITTENT REDUCTION LASTING FROM ABOUT ONE TO ABOUT TEN MINUTES.