公开(公告)号：US3847831A

公开(公告)日：1974-11-12

申请号：US7643870

申请日：1970-09-29

Applicant: STAMICARBON

Inventor： SLOT H ,  GEUS J

IPC: B01J23/28 ,  B01J23/31 ,  B01J23/34 ,  B01J23/88 ,  B01J23/881 ,  B01J23/887 ,  B01J11/22

CPC classification number: C07C253/26 ,  B01J23/28 ,  B01J23/31 ,  B01J23/34 ,  B01J23/88 ,  B01J23/881 ,  B01J23/8876 ,  Y02P20/52 ,  C07C255/08

Abstract: 1. A PROCESS FOR THE PREPARATION OF A CATALYST SYSTEM CONTAINING OXIDES OF BISMUTH, MOLYBDENUM AND IRON WHICH CONSISTS ESSENTIALLY IN CARRYING OUT THE STEPS OF: (A) FORMING AN AQUEOUS ACID SOLUTION CONTAINING IONS OF BISMUTH, AND IONS OF IRON IN AN ATOMIC RATIO NO GREATER THAN 0.4:1 RELATIVE TO SAID BISMUTH IONS, AND AN AQUEOUS ALKALINE SOLUTION, INJECTING ONE OF SAID SOLUTIONS INTO THE OTHER WHILE MAINTAINING THE PH OF THE RESULTING AQUEOUS SOLUTION AT A VIRTUALLY CONSTANT VALUE OF AT LEAST ABOUT 7 WHEREBY A PRECIPITATE OF COMPOUNDS OF SAID IONS IS FORMED, AND SEPARATING SAID PRECIPITATE FROM SAID RESULTING AQUEOUS SOLUTION; (B) FORMING A SUSPENSION OF SAID PRECIPITATE IN AN AQUEOUS MEDIUM, ADJUSTING THE PH OF SAID SUSPENSION TO A VALUE OF BETWEEN ABOUT 2.5 AND 7, AND WHILE HEATING AND AGITATING SAID SUSPENSION, AND MAINTAINING THE PH OF SAID SUSPENSION AT A VALUE OF GREATER THAN ABOUT 2.5, INTRODUCING AN AQUEOUS SOLUTION OF AMMONIUM MOLYBDATE INTO SAID SUSPENSION IN AN AMOUNT IN EXCESS OF A MOLYBDENUM TO BISMUTH ATOMIC RATIO OF ABOUT 1:1 BY AN AMOUNT OF MOLYBDENUM STOICHIOMETRICALLY EQUIVALENT TO THE QUANTITY OF IRON PRECIPITATED IN STEP (A), AND AT A RATE NO GREATER THAN 0.1 GRAM MOLE OF MOO4 PER LITER OF SUSPENSION PER HOUR, THEREAFTER HEATING SAID SUSPENSION AT OR NEAR THE BOILING TEMPERATURE FOR A PERIOD OF AT LEAST 6 HOURS WHEREBY SUBSTANTIALLY ALL OF SAID MOLYBDENUM IS TAKEN UP BY SAID PRECIPITATE.

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.

公开(公告)号：US3743662A

公开(公告)日：1973-07-03

申请号：US3743662D

申请日：1970-05-28

Applicant: STAMICARBON

Inventor： EURLINGS J ,  GEUS J ,  WETERINGS C

IPC: B01J23/00 ,  B01J23/72 ,  C11C3/12

CPC classification number: C11C3/123 ,  B01J23/72

Abstract: THE PRESENT INVENTION RELATES TO A PROCESS OF HYDROGENATING OIL AT ELEVATED TEMPERATURE, BY MEANS OF A CATALYST CONTAINING ELEMENTARY COPPER AND NICKEL ON A THERMOSTABLE CARRIER MATERIAL. THE CATALYST IS OBTAINED IN THREE SEPARATE STEPS; IN THE FIRST STEP A HOMOGENEOUS LAYER OF HYDRATED NICKEL OXIDE IS PRECIPITATED ONTO THE THERMOSTABLE CARRIER MATERIAL, IN THE SECOND STEP AN INSOLUBLE COPPER COMPOUND IS PRECIPATED IN HOMOGENEOUS DISTRIBUTION ONTO TE LAYER OF HYDRATED NICKEL OXIDE, AND IN THE THIRD STEP THE LOADED CARRIER MATERIAL IS SUBJECTED TO A REDUCTIVE TREATMENT AT A TEMPERATURE ABOVE 150*C.

公开(公告)号：US3723353A

公开(公告)日：1973-03-27

申请号：US3723353D

申请日：1970-05-25

Applicant: STAMICARBON

Inventor： EURLINGS J ,  GEUS J ,  WETERINGS C

IPC: B01J23/72 ,  B01J23/755 ,  B01J11/42

CPC classification number: B01J23/755 ,  B01J23/72

Abstract: THE PRESENT INVENTION RELATES TO A PROCESS FOR THE PREPRATION OF A CATALYST MASS FROM DILUTE AQUEOUS SOLUTIONS OF COPPER AND NICKEL SALTS, PARTICULARLY PRECIPITATION OF A COPPER COMPOUND OUT OF AN AQUEOUS SOLUTION ONTO A THERMALLY STABLE CARRIER MATERIAL SUSPENDED THEREIN. THE COPPER COMPOUND IS SECURED TO THE CARRIER MATERIAL VIA A NICKEL COMPOUND AND IS REDUCED TO METALLIC COPPER AFTER BEING SO SECURED. COPPER CATALYSTS HAVE A WIDE FIELD OF APPLIATION IN DEHYDROGENATION REACTIONS, E.G., THE DEHYDROGENATION OF CYCLOHEXANOL TO CYCLOHEXANONE AND OF ISOPROPYL ALCOHOL TO ACETONE. COPPER CATALYSTS ARE ALSO VERY SUITABLE FOR CARRYING OUT SELECTIVE HYDROGENATION PROCESSES, THERE ARE INDICATIONS THAT METALLIC COPPER SURFACES MAY GREATLY ACCELERATE THE OXIDATION OF HYDROCARBONS E.G. CUMENE VIA RADICAL MECHANISMS.