Gas-phase oxygen oxidations of alkylaromatics over CVD Fe/Mo/borosilicate molecular sieve. V. Para-selective oxidations of methylaromatics

✍ Scribed by Jin S. Yoo; Paul S. Lin; Shari D. Elfline

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 898 KB
• Volume: 124
• Category: Article
• ISSN: 0926-860X
• DOI: 10.1016/0926-860x(94)00255-x

✦ Synopsis

Gas-phase oxygen oxidation of methylaromatics was studied over the chemical vapor deposited (CVD) M/MO/partially dehoronated borosilicate molecular sieve (DBH) catalysts (M = Fe, Sb, Zn, Bi, Zr or Sn). The methylaromatics include toluene, xylenes, pseudocumene, mesitylene and durene. These catalysts exhibited a unique property of catalyzing oxidation of the two para-oriented methyl substituents in polymethylated benzenes to form terephthaldehyde derivatives. The paru- oriented methyl substituents play a key role in defining the catalytic activity and selectivity toward aldehyde. Terephthaldehyde and monoaldehyde derivatives were formed from p-xylene, pseudocumene and durene while toluene was converted to benzaldehyde. m-Xylene and mesitylene remained unreactive over these catalysts.