Yoshihiko Nagaoka

TL;DR: In this article, a process for producing unsaturated aldehyde and an unsaturated carboxylic acid is described, which comprises subjecting propylene, isobutylene or tertiary butanol to gas phase catalytic oxidation with molecular oxygen in the presence of a catalyst comprising composite oxide of the formula Mo a Bi b Fe c A d B e C f D g O x and a molybdenum oxide which in itself is substantially inert to the gas phase catalyst.

TL;DR: In this paper, the authors investigated the vapor phase nitration of benzene over acidic catalysts utilizing diluted nitric acid (dil. HNO 3 ) as a nitrating agent and found that several solid acid catalysts such as montmorillonite ion-exchanged with a multivalent metal cation and mixed metal oxides containing TiO 2 or ZrO 2 exhibited such high activities as 80-90% yields of nitrobenzene (STY=0.6lg/g cat h) for more than 480h on-streams.

TL;DR: In this article, a fixed bed multi-tubular reactor packed with a catalyst prepared by supporting a catalytically active substance containing at least molybdenum and vanadium on an inert carrier is successively packed into the reaction tube to carry out the reaction.

TL;DR: In this paper, the authors investigated the vapor phase nitration of benzene by dilute nitric acid and found that mixed metal oxides containing TiO2 or ZrO2 was improved greatly by the treatment with sulfuric acid at 500°C and that the catalytic activity of heteropolyacid can be increased greatly by partial neutralization with Cs or Tl.

TL;DR: In this paper, the authors have succeeded in keeping a high nitration activity of the supported sulfuric acid catalyst for more than two months by co-feeding a trace amount of sulfuric acids (H 2 SO 4 /HNO 3 ǫ = 1/5000 (wt. ratio).