Method for hydrotreating ethylene tar
A technology for ethylene tar and hydrocracking, which is applied in the fields of hydrotreating process, hydrocarbon oil treatment, petroleum industry, etc., and can solve the problems that the ethylene tar fraction cannot be processed and has not been effectively treated.
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Embodiment 1~3
[0053] The properties of the light and heavy fractions of ethylene tar used are shown in Table 2 and Table 4. Example The ethylene tar light fraction is treated by a series process. Two reactors are used. The first reactor is equipped with a hydrogenation protection agent FZC-103 and a hydrofining catalyst 3936, and the upper part of the second reactor is filled with a hydrogenation carbon removal catalyst HDC. -3. The first hydrocracking catalyst loaded in the middle is a hydrocracking catalyst containing amorphous silica-alumina and Y molecular sieve, and the second hydrocracking catalyst loaded in the lower part is a hydrocracking catalyst containing amorphous silica-alumina and β molecular sieve . In the embodiment, the volume ratio of FZC-103:3936:HDC-3:first hydrocracking catalyst:second hydrocracking catalyst is as follows: 12:19:19:25:25. The results of the reaction are shown in Table 3. In addition, the device has been operated for 5,000 hours, and the distribution ...
Embodiment 4
[0061] use figure 1 In the flow process shown, the ethylene tar heavy fraction (see Table 4 for properties) passes through the hydrogenation protection catalyst, the hydrogenation deresidue catalyst and the hydrogenation conversion catalyst successively, and its volume ratio is 10:40:50, wherein the hydrogenation protection catalyst used They are FZC-100 and FZC-102B, and their volume ratio is 1:2. The hydrogenation conversion catalyst, such as the catalyst obtained in Example 1 of CN02109422.5, is denoted as ZH1, and its properties are shown in Table 5.
[0062] Table 5 Composition and properties of hydroconversion catalysts
[0063]
[0064] The loading volume ratio of the used hydrodecarbonization catalyst HDC-1 and HDC-2 is 4:6. The loading order of the hydrogenation catalyst for the heavy fraction of ethylene tar is as follows: FZC-100, FZC-102B, HDC-1, HDC-2, ZH1. In this embodiment, the weight ratio of the heat low fraction oil recycled back to the hydrogena...
Embodiment 5
[0066] Compared with Example 4, the heat high fraction oil circulation is adopted, and the weight ratio of the heat high fraction oil recycled to the hydrogenation reaction zone to the heavy fraction of ethylene tar is 2.0, and the used hydrogenation carbon removal catalyst The filling volume ratio of HDC-1 and HDC-2 was changed to 5:5, and the rest were the same as in Example 4.
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