Hydrofining method for heavy benzene
A technology for hydrofining and heavy benzene, which is applied in hydrotreating process, petroleum industry, hydrocarbon oil treatment, etc. It can solve the problem of high temperature rise in the pre-hydrofining reaction zone, and achieve stable and safe operation and save equipment The effect of investment and extended operation cycle
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[0029] Examples 1~3
[0030] The properties of the heavy benzene raw materials used are shown in Table 1, and the specific process flow is shown in figure 1 .
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[0031] In Example 1 and Example 3, the pre-hydrorefining reaction zone was filled with hydrorefining catalyst FF-26, and the main hydrogenation reaction zone was filled with hydrogenation protection catalyst FZC-103 and hydrorefining catalyst 3936 in sequence from top to bottom. The filling volume ratio of the two catalysts is 1:7; in Example 2, the pre-hydrorefining reaction zone is filled with the hydrorefining catalyst 3936, and the main hydrogenation reaction zone is sequentially filled with the hydrogenation protection catalyst FZC-103 and hydrogenation from top to bottom. For refined catalyst FF-26, the filling volume ratio of the two catalysts is 1:5.
[0032] In Examples 1 to 3, after the gas-liquid separation of the pre-hydrorefining product oil, the separated liquid phase product is recycled back to the pre-hydrorefining reaction zone and mixed with the raw material heavy benzene. The circulating weight ratio of the pre-hydrorefining oil to heavy benzene in Example 1 an...
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