申请人:MITSUI PETROCHEMICAL INDUSTRIES, LTD.
公开号:EP0205317A1
公开(公告)日:1986-12-17
A process for producing an alkenyl substituted aromatic compound having the general formula (I):
wherein Ar represents an aromatic ring, R' represents an alkenyl group having 2 to 8 carbon atoms, p is 1, 2, or 3 provided that R1 may be the same or different when p is 2 or 3, R2 represents an alkyl group having 1 to 8 carbon atoms, q is 0, 1, or 2 provided that R2 may be the same or different when q is 2, X represents -OH or-NR3R4 wherein R3 and R4 independently represent hydrogen or an alkyl group having 1 to 2 carbon atoms, n is 1 or 2, provided that the sum of p and q is 1, 2, or 3 comprising the step of catalytically dehydrogenating an alkyl substituted aromatic compound having the general formula (II):
wherein R5 represents an alkyl group having 2 to 8 carbon atoms and Ar, R2, X, p, q, and n are the same as defined above, n is 1 or 2, provided that R5 may be the same or different when p is 2 or 3 in the presence of a catalyst comprising (a) at least one iron oxide as a main component and (b) at least one oxide of metals belonging to the group III, IV or V of the periodic table of atoms.
This catalyst can produce an alkenyl substituted aromatic compound having a hydroxyl or amino group in the aromatic ring thereof from the dehydrogenation of the corresponding alkyl substituted aromatic compound at a higher yield and high selectivity and has a prolonged catalyst life.
一种具有通式(I)的烯基取代的芳香族化合物的生产工艺:
其中 Ar 代表芳香环,R'代表具有 2 至 8 个碳原子的烯基,p 为 1、2 或 3,条件是当 p 为 2 或 3 时 R1 可以相同或不同,R2 代表具有 1 至 8 个碳原子的烷基,q 为 0、1 或 2,条件是当 q 为 2 时 R2 可以相同或不同、X 代表-OH 或-NR3R4,其中 R3 和 R4 独立地代表氢或具有 1 至 2 个碳原子的烷基,n 为 1 或 2,条件是 p 和 q 之和为 1、2 或 3,包括催化脱氢具有通式(II)的烷基取代的芳香族化合物的步骤:
其中 R5 代表具有 2 至 8 个碳原子的烷基,Ar、R2、X、p、q 和 n 与上文所定义的相同,n 为 1 或 2,但当 p 为 2 或 3 时,R5 可以相同或不同,催化剂包括 (a) 至少一种作为主要成分的氧化铁和 (b) 至少一种属于原子周期表 III、IV 或 V 族的金属氧化物。
这种催化剂可通过相应的烷基取代的芳香化合物的脱氢反应生产出芳香环上有羟基或氨基的烯基取代的芳香化合物,产率高,选择性好,催化剂寿命长。