Multiple promoted iron oxide-antimony oxide catalysts for oxidation of olefins

Abstract

Abstract This invention provides a multiple promoted iron oxide-antimony oxide catalyst composition having the empirical formula: Fe10Sb560Me0 01-1Te0 05-5X0-1O22-151 wherein Me is V, Mo or W, and X is P or B. The catalyst composition of this invention exhibits an improved catalytic activity in an oxidation reaction selected from the group consisting of ammoxidation of olefins to nitriles, oxidation of olefins to aldehydes, and oxidative dehydrogenation of olefins (C4-C8) to diolefins, particularly in the case where high conversion is achieved and the amount of residual oxygen is very small. For example, the catalysts of this invention (Ex. 1 and Ex. 12) and the catalysts of the prior art (R-1 and R-6) are prepared in the same manner, the compositions of these catalysts being as follows: Ex. 1 : Fe10Sb25W0 25Te0 5-1067-68.(SiO2)30 Ex. 12 : Fe10Sb25W0 1Te0 2-1O66-68.(SiO2)30 R-1 : Fe10Sb25O65.(SiO2)30 R-6 : Fe10Sb25W1 5O70.(SiO2)30 Note: By ''''(SiO2)30'''' is meant silica carrier. The activities of these catalysts are tested by the same method. The following maximum conversions (%) of olefins to acrylonitrile (AN), methacrylonitrile (MAN), acrolein (AL), methacrolein (MAL) and butadiene (BDE) are obtained: AN MAN AL MAL BDEEx. 1 78 70 70 58 82 Ex. 12 77 69 69 55 82 R-1 65 53 33 26 73 R-6 - 49 43 33 70

Inventors

• 👤 Takachika Yoshino
• 👤 Shigeru Saito
• 👤 Jun Ishikura
• 👤 Yutaka Sasaki
• 👤 Masukuni Sobukawa

Bibliographic Details