Selective oxidation method for unsaturated aldehyde

The invention relates to a preparation method for unsaturated acid from unsaturated aldehyde. A fixed bed reactor is employed; the part of the reactor from a reaction raw material inlet to an outlet is divided into a segment S1 and a segment S2; the segment S1 is filled with a Mo-Vi double-layer cat...

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Bibliographische Detailangaben
Hauptverfasser:	WANG LINGLING, HE YING, BAI JINGBING, WANG XUELI, LI JIE, LIU XIAOLAN, ZHU BO, MA YANPING, ZHANG XIAOQI, LI YAO, ZHANG ZHONGDONG, LI YAN, XIE YUAN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	The invention relates to a preparation method for unsaturated acid from unsaturated aldehyde. A fixed bed reactor is employed; the part of the reactor from a reaction raw material inlet to an outlet is divided into a segment S1 and a segment S2; the segment S1 is filled with a Mo-Vi double-layer catalyst with inner layer concentration higher than external layer concentration; the segment S2 is filled with a catalyst (I) which has a double-layer structure; the catalyst (I) has the double-layer structure, and main composition of the catalyst is expressed by the general formula (I)--MoaVbWcCudNieSnfSigMhOx (I). The method is applicable to preparation of acrylic acid through selective oxidation of acrolein; bed temperature of the reactor is reasonably distributed; and the target product acrylic acid has high selectivity and yield.