公开(公告)号：US3578413A

公开(公告)日：1971-05-11

申请号：US3578413D

申请日：1968-11-21

Applicant: STAMICARBON

Inventor： VORAGE VICTOR A M G

IPC: B01J8/24 ,  G05D7/03 ,  B01J9/20 ,  C07D55/28

CPC classification number: B01J8/1809 ,  B01J2208/0007 ,  B01J2208/00132 ,  B01J2208/00539 ,  B01J2208/00548 ,  G05D7/03

Abstract: APPARATUS FOR PRODUCING MELAMINE FROM UREA WHICH INCLUDES IN COMBINATION A REACTOR AND SEPARATING DEVICES IN COMMUNICATION THEREWITH FOR REMOVING MELAMINE FROM THE REACTION PRODUCT AND RECOVERING NH3FROM THE ESSENTIALLY MELAMINE-FREE REACTION PRODUCT. THE RECOVERED NH3 IS RECYCLED TO THE REACTOR TO FLUIDIZE THE CATALYST BED THEREIN AND TO ATOMIZE THE UREA FED THERETO FOR CONVERSION INTO MELAMINE. VENTING CONDUIT MEANS AND SUPPLEMENTAL AMMONIA CONDUIT MEANS ARE ALSO PROVIDED. MEANS FOR SENSING THE PRESSURE IN THE REACTOR AND SEPARATING DEVICES AND FOR SENSING THE AMOUNT OF AMMONIA INTRODUCED INTO THE REACTOR TO FLUIDIZE THE CATALYST BED ARE EMPLOYED AND IN RESPONSE TO THE SENSED PRESSURE AND QUANTITY VALUES. THE PRESSURE AND AMOUNT OF AMMONIA UTILIZED ARE CONTROLLED TO MAINTAIN THE REACTOR IN OPERATIONAL CONDITION.