The conversion rules of benzene(B), methyl cyclopentane(MCP) and cyclohexane(CH) components over an industrial mid-temperature isomerization catalyst were studied by a laboratory evaluation device. Test results showed that under medium temperature isomerization conditions, benzene in the feed could be converted completely; when reaction temperature was less than 220 'C , benzene converted to methyl cyclopentane and cyclohexane mainly with little cracking products;with the increase of reaction temperature, products obtained by ring opening and cracking increased. The conversion of methyl cyclopentane increased with the increase of reaction temperature;at low temperature cyclohexane was its main product, with the increase of reaction temperature the cracking products increased significantly. The same with the conversion of cyclohexane, only methyl cyclopentane was the main product from converting cyclohexane at low temperature. Process schemes for benzene removal of feeds with various benzene, methyl cyclopentane and cyclohexane (B+MCP +CH) contents were proposed as follows: for feeds with relatively low (B + MCP + CH) contents, the existing isomerization process scheme could be used to realize the complete conversion of benzene with a little change of product octane number and liquid yield;for feeds with high (B + MCP + CH) contents, the combined process of frac-tionation and isomerization should be a good choice, by optimizing process conditions product with high (MCP+CH) content and higher octane number could be obtained.%在小型评价装置上,考察苯、甲基环戊烷、环己烷组分在工业中温异构化催化剂上的转化规律.结果表明:在中温异构化反应条件下,异构化原料中的苯经加氢全部转化,反应温度低于220℃时,苯完全转化为甲基环戊烷和环己烷,裂解活性较低,随着温度的升高,开环产物增加,裂解反应加剧；甲基环戊烷的转化率随温度升高而增加,低温下的产物主要为环己烷,随着温度的升高,裂解反应加剧,裂解产物明显增加.环己烷的转化率随温度升高而增加,低温下的产物主要为甲基环戊烷,随着温度的升高,裂解反应加剧,裂解产物增加；对于甲基环戊烷、苯、环己烷总含量较低的异构化原料,可以选择现有的异构化流程,实现苯全部转化,而对产物的辛烷值和液体收率影响不大.对于甲基环戊烷、苯、环己烷总含量较高的异构化原料可以选择(精馏十异构化)组合工艺,通过工艺条件的控制,可以使异构化产物中具有较高的甲基环戊烷和环己烷含量,产品的辛烷值提高.
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