초록 ▼

A support for a gas-phase oxidation catalyst, the support including a solid acid, of which acid strength (H0) meets an inequality:-5.6≦H0≦1.5; a gas-phase oxidation catalyst including the above support and a complex oxide containing molybdenum and vanadium as essential components, the co

A support for a gas-phase oxidation catalyst, the support including a solid acid, of which acid strength (H0) meets an inequality:-5.6≦H0≦1.5; a gas-phase oxidation catalyst including the above support and a complex oxide containing molybdenum and vanadium as essential components, the complex oxide being supported on the support; a process for producing acrylic acid by gas-phase catalytic oxidation of acrolein with molecular oxygen, the process including carrying out the gas-phase catalytic oxidation in a presence of the above gas-phase oxidation catalyst; and a process for producing the above support, the process including controlling an acid strength (H0) of a solid acid so as to meet an inequality:-5.6≦H0≦1.5 by adjusting a calcination temperature in a preparation of the solid acid contained in the support.

대표청구항 ▼

The invention claimed is: 1. A gas-phase oxidation catalyst comprising a support comprising a solid acid, of which acid strength (H0) meets an inequality:-5.6≦H0≦1.5, and a complex oxide containing molybdenum and vanadium as essential components, the complex oxide being supported on the

The invention claimed is: 1. A gas-phase oxidation catalyst comprising a support comprising a solid acid, of which acid strength (H0) meets an inequality:-5.6≦H0≦1.5, and a complex oxide containing molybdenum and vanadium as essential components, the complex oxide being supported on the support. 2. The gas-phase oxidation catalyst according to claim 1, wherein the complex oxide is expressed by formula (1): description="In-line Formulae" end="lead"Mo12VaWbCucAdB eOx (1)description="In-line Formulae" end="tail" wherein Mo is molybdenum; V is vanadium; W is tungsten; Cu is copper; A is at least one element selected from the group consisting of cobalt, nickel, iron, chromium, lead, and bismuth; B is at least one element selected from the group consisting of antimony, niobium, and tin; O is oxygen; a, b, c, d, e, and x mean atomic ratios of V, W, Cu, A, B, and O, respectively, and meet inequalities: 2≦a≦15, 0≦b≦10, 0