CATALYST FOR PRODUCING ACRYLIC ACID AND PROCESS FOR PRODUCING ACRYLIC ACID USING THE CATALYST

• Main Authors: SHIMA MASAHIDE, IGUCHI NORIHIKO, NISHIGUCHI TOSHIYA
• Format: Patent
• Language: English; Japanese
• Published: 25.04.2016
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a catalyst which, when producing acrylic acid from propane and/or acrolein, is excellent in catalytic performance such as catalytic activity and selectivity and in catalyst life, and which exhibits stable performance for a long period of time.SOLUTION: Provided is a catalyst for producing acrylic acid by contact gas-phase oxidation of propane and/or acrolein in the presence of molecular oxygen or a gas containing molecular oxygen, the catalyst containing molybdenum and vanadium as essential components. In an X-ray diffraction analysis of catalytically active components using a Cu-Kα ray, I(36.9°)/I(22.2°), a ratio of a peak intensity at a diffraction angle 2θ of 36.9°±0.3° to a peak intensity at a diffraction angle 2θ of 22.2°±0.3° is 0.04 or more and less than 0.7.SELECTED DRAWING: None 【課題】プロパンおよび／またはアクロレインからアクリル酸を製造するに際し、触媒活性、選択性等の触媒性能および触媒寿命に優れ、長期にわたって安定した性能を示す触媒を提供する。【解決手段】モリブデンおよびバナジウムを必須成分として含有するプロパンおよび／またはアクロレインを分子状酸素または分子状酸素含有ガスの存在下で接触気相酸化してアクリル酸を製造するための触媒であって、触媒活性成分のＣｕ−Ｋα線を用いたＸ線回折分析において、回折角２θ＝２２．２°±０．３°のピーク強度に対する回折角２θ＝３６．９°±０．３°のピーク強度の比Ｉ（３６．９°）／Ｉ（２２．２°）が０．０４以上０．７未満である触媒。【選択図】 なし