| abstract |
A PROCESS FOR PRODUCING ACROLEIN AND ACRYLIC ACID BY BRINGING A MIXED GAS CONTANING PROPYLENE AND OXYGEN INTO CONTACT AT AN ELEVATED TEMPERATURE IN A VAPOR PHASE WITH A CATALYST WHICH IS HIGHLY ACTIVE AND ENTAILS VERY LITTLE DEGRADING EFFECT OF AGING ON ITS CATALYTIC ACTIVITY, ACCORDING TO THIS PROCESS, THE TOTAL SELECTIVITY OF ACROLEIN AND ACRYLIC ACID EXCEED 96% WHERE THE CONVERSION OF PROPYLENE IS NOT LESS THAN 96%, THE SAID CATALYST CONTAINGS PHOSPHORUS, TUNGSTEN, MOLYBDENUM, TELLURIUM AND OXYGEN, ONE COMBINATION SELECTED FROM AMONG (A) TWOMEMBER COMBINATION OF NICKEL AND IRON, (C) THREE-MEMBER BER COMBINATION OF NICKEL AND IRON, (C) THREE-MEMNER COMBINATION OF NICKEL, COBALT AND BISMUTH AND (C) THREEMEMBER COMBINATION OF NICKEL, IRON AND BISMUTH AND AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF TIN, POTASSIUM AND RUBIDIUM. |