公开(公告)号：US3714323A

公开(公告)日：1973-01-30

申请号：US3714323D

申请日：1970-01-26

Applicant: SNAM PROGETTI

Inventor： DOLCI G ,  RENZONI R

IPC: G21C19/44 ,  C22B61/04

CPC classification number: G21C19/44 ,  Y02W30/882

Abstract: METHODS ARE DISCLOSED FOR ELIMINATING CARBON FROM NUCLEAR FUEL ELEMENTS IN THE REPROCESSING THEREOF IN A CLOSED SYSTEM. IN ONE EMBODIMENT, THE CARBON IS REACTED WITH CARBON DIOXIDE TO FORM CARBON MONOXIDE IN AN ATTACK ZONE WHICH IS MAINTAINED AT A TEMPERATURE OF ABOUT 1000*C., THE CARBON MONOXIDE IS THEN CAUSED TO FLOW TO A REGENERATION ZONE WHICH IS MAINTAINED AT A LOWER TEMPERATURE SO THAT A REVERSE REACTION OCCURS WHICH CONVERTS THE CARBON MONOXIDE INTO CARBON DIOXIDE AND REGENERATED CARBON, THE CARBON DIOXIDE FLOWS BACK TO THE ATTACK ZONE LEAVING THE REGENERATED CARBON BEHIND IN THE REGENERATION ZONE.

公开(公告)号：US3728274A

公开(公告)日：1973-04-17

申请号：US3728274D

申请日：1969-12-05

Applicant: SNAM PROGETTI

Inventor： GERONTOPOULOS P ,  NERI D ,  RENZONI R

IPC: B01J2/08 ,  C01G43/025 ,  C01G56/00 ,  C09K3/00

CPC classification number: B01J2/08 ,  C01G43/025 ,  C01G56/004 ,  C01P2004/32 ,  C01P2006/14

Abstract: THIS INVENTION RELATES TO A PROCESS FOR THE PRODUCTION OF A POROUS REFRACTORY MATERIAL WHICH COMPRISES URANIUM OXIDE AND AN OXIDE SELECTED FROM THE GROUP CONSISTING OF THE OXIDES OF THORIUM, PLUTOMIUM, BERYLLIUM, SILICON, ALUMINUM AND MAGNESIUM, WHICH PROCESS COMPRISES HEATING THE REFACTORY MATERIAL IN AN INERT OR OXIDIZING ATMSOPHERE, REPLACING THE INERT OR OXIDIZING ATMOSPHERE BY A REDUCING ATMOSPHERE, FURTHER INCREASING THE EMPERATURE OF THE HEATED REFRACTORY MATERIAL TO PRODUCE A MATERIAL HAVING POROSITY OF FROM 2% TO 30%.