Process for producing acrylonitrile

Abstract

Abstract THIS INVENTION PROVIDES AN IMPROVED PROCESS FOR THE PRODUCTION OF ACRYLONITRILE WHICH COMPRISES CONTACTING A MIXTURE OF PROPYLENE, MOLECULAR OXYGEN AND AMMONIA IN THE VAPOR PHASE AT AN ELEVATED TEMPERATURE WITH A CATALYST HAVING THE EMPIRICAL FORMULA: FE10SB5-80V0.01-2X0-2O22-186 WHEREIN X REPRESENTS P OR B. THE CATALYST MENTIONED ABOVE IS DISTINGUISHED OVER THE PROMOTED OR UNPROMOTED IRON OXIDE-ANTIMONY OXIDE CATALYST DISCLOSED IN THE PRIOR ART, IN THE FOLLOWING RESPECTS: (1) IT COMPRISES A BASE CATALYST SYSTEM HAVING A SPECIFIC ATOMIC RATIO OF FE/SB AND A PARTICULAR PROMOTER BEING PRESENT IN AN EXTREMELY SMALL AMOUNT, (2) IT EXHIBITS AN IMPROVED CONVERSION OF PROPYLENE TO ACRYLONITRILE, PARTICULARLY IN THE CASE WHERE HIGH CONVERSION IS ACHIEVED AND THE AMOUNT OF RESIDUAL OXYGEN IS VERY SMALL. FOR EXAMPLE, THE CATALYSTS ACCORDING TO THIS INVENTION (E-1, E-4 AND E-6), AND THE CATALYSTS DISCLOSED IN THE PRIOR ART (R-1, R-2 AND R-4) ARE PREPARED BY SIMILAR PROCEDURES, AND THE ACTIVITIES THEREOF ARE TESTED BY THE SAME METHOD TO OBTAIN RESULTS AS SHOWN IN THE FOLLOWING TABLE. D R A W I N G

Inventors

• 👤 Takachika Yoshino
• 👤 Shigeru Saito
• 👤 Yutaka Sasaki
• 👤 Kiyoshi Moriya

Bibliographic Details