MANUFACTURING METHOD OF UNSATURATED ALDEHYDE AND/OR UNSATURATED CARBOXYLIC ACID

• Main Authors: SHIGEMORI KEISUKE, HIRAOKA RYOTA
• Format: Patent
• Language: English; Japanese
• Published: 05.10.2023
• 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

To provide a manufacturing method that is a gas phase catalytic oxidation method that manufactures unsaturated aldehyde and unsaturated carboxylic acid corresponding to raw materials such as propylene, isobutylene, and t-butyl alcohol and has high yield of a target product even in a region where a raw material conversion rate is high.SOLUTION: A manufacturing method of unsaturated aldehydes and/or unsaturated carboxylic acids is provided, in which a fixed bed multitubular reactor is used, and a plurality of catalyst layers formed by dividing it into n parts (n is 2 or more) in the gas flow direction of a reaction tube is established. According to the method, a ratio (A1/A2) of a catalyst active component density (A2) up to a raw material gas outlet from a half of a total filling length to a catalyst active component density (A1) up to a half of a total filling length from the raw material gas inlet is 1.10 to 2.0.SELECTED DRAWING: None 【課題】本発明は、プロピレン、イソブチレン、ｔ－ブチルアルコール等を原料にして対応する不飽和アルデヒド、不飽和カルボン酸を製造する気相接触酸化方法であって、原料転化率が高い領域においても目的生成物の収率が高い製造方法を提案するものである。【解決手段】固定床多管型反応器を用い、反応管のガス流れ方向に対しｎ分割（ｎは２以上）して形成される複数の触媒層を設ける、不飽和アルデヒド及び／又は不飽和カルボン酸の製造方法であって、原料ガス入口部から全充填長の半分までの触媒活性成分密度（Ａ１）と全充填長の半分から原料ガス出口部までの触媒活性成分密度（Ａ２）の比（Ａ１／Ａ２）が１．１０～２．０である不飽和アルデヒド及び／又は不飽和カルボン酸の製造方法。【選択図】なし