申请人:——
公开号:US20040054169A1
公开(公告)日:2004-03-18
In the production of &egr;-caprolactam by contacting cyclohexanone oxime with a solid acid catalyst in the gaseous phase to effect a rearrangement reaction of the cyclohexanone oxime, wherein the solid acid catalyst is produced by calcining a dried catalyst precursor: in a first aspect, the catalyst precursor comprises a zeolite, a crystalline clay mineral and at least one substance selected from the group consisting of an inorganic oxide and a compound which forms the inorganic oxide by calcination, wherein the inorganic oxide comprises an oxide of at least one element selected from the group consisting of elements belonging to Groups 4, 13 and 14 of the Periodic Table and wherein the inorganic oxide is other than oxides contained in a crystalline form in the zeolite and the crystalline clay mineral; or in a second aspect, the rearrangement reaction is effected in the presence of a polyhydric alcohol derivative represented by the following formula: R
1
—O—R
2
—OH (wherein: R
1
represents a C
1
-C
5
alkyl group or a phenyl group, and R
2
represents a C
2
-C
5
alkylene group).
通过在气相中将环己酮肟与固体酸催化剂接触以引发环己酮肟的重排反应,制备&egr;-己内酰胺,其中所述固体酸催化剂是通过煅烧干燥的催化剂前体制备的:在第一方面,所述催化剂前体包括沸石,结晶粘土矿物和至少一种从以下组中选择的物质:无机氧化物和通过煅烧形成无机氧化物的化合物,其中所述无机氧化物包括属于周期表第4、13和14组元素中至少一种元素的氧化物,且所述无机氧化物不同于沸石和结晶粘土矿物中以晶体形式存在的氧化物;或在第二方面,所述重排反应在存在以下式表示的多羟基醇衍生物的情况下进行:R1—O—R2—OH(其中:R1表示C1-C5烷基或苯基,R2表示C2-C5烷基)。