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在铬铝催化剂上,温度400—500℃和空速0.1—0.87时~(-1)的反应条件下,研究了β-正庚萘、β-(2-甲基丁基)萘、β-(1-丙基丁基)萘和β-(1-丁基丁基)萘的脱氢环化。β-烷基萘的烷基侧链结构对脱氢环化反应有明显的影响。β-(2-甲基丁基)萘的脱氢环化同β-(3-甲基丁基)萘比较类似,生成30％的2-甲基蒽;但同β-(1-甲基丁基)萘较少类似,仅生成约5％的菲。当β-烷基萘的烷基侧链碳原子多于6个时,不仅在烷基侧链与萘环碳原子之间可以脱氢环化,生戍菲、蒽及其同系物,而且在烷基侧链碳原子之间也可以脱氢环化生成苯井芴和(?)等稠环芳烃,在β-烷基萘脱氢环化的同时,还伴随有裂解反应;烷基侧链愈长,裂解现象就越严重。
Under the reaction conditions of chromium aluminum catalyst, temperature 400-500 ℃ and space velocity 0.1-0.87 ~ (-1), the effects of β-n-heptaphnaphthalene, β- (2-methylbutyl) (1-propylbutyl) naphthalene and β- (1-butylbutyl) naphthalene. The alkyl side chain structure of β-alkylnaphthalene has obvious effect on dehydrocyclization reaction. The dehydrocyclization of β- (2-methylbutyl) naphthalene is similar to that of β- (3-methylbutyl) naphthalene and produces 30% of 2-methylanthracene; Butyl) naphthalene is less similar, generating only about 5% phenanthrene. When the alkyl side-chain carbon atoms of the beta-alkylnaphthalene are more than six, not only the dehydrocyclization between the alkyl side chain and the naphthalene ring carbon atoms gives rise to phenanthrene, anthracene and their homologues, The alkyl side chain carbon atoms can also be dehydrocyclization to benzene fluorene and (?) And other polycyclic aromatic hydrocarbons, in the β - alkylnaphthalene dehydrocyclization, accompanied by a cleavage reaction; alkyl side chain The longer, the more serious the phenomenon of cracking.