Hydrotreatment and catalytic cracking combined processing method for residual oil
A technology for catalytic cracking and residual oil hydrogenation, applied in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problem of reducing the processing capacity and economic benefits of the RFCC unit, increasing the load of the regenerator, and low yield of light oil, etc. problems, to achieve the effect of inhibiting coke formation, increasing hydrogen content, and prolonging operation cycle
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Embodiment 1
[0063] In this example, the residual oil hydrogenation test was carried out in a double-tube reactor. Based on the flow direction of the material, the hydrogenation protecting agent and the hydrodemetallization catalyst were sequentially filled in the first reactor (abbreviated as the first reactor). The second reactor (referred to as the second reactor) is filled with a hydrodesulfurization catalyst, and the weight ratio of the three is hydrogenation protecting agent: hydrodemetallization agent: hydrodesulfurization catalyst = 4.8:47.6:47.6. Among them, the trade name of the hydrogenation protection agent is RG-20B; the trade name of the hydrodemetallization catalyst is RDM-35, RDM-32 and RDM-33, and the weight ratio of the three hydrodemetallization catalysts is 2:2:1 ; The trade name of the hydrodesulfurization catalyst is RMS-30; the hydrogenation protecting agent, hydrodemetallization catalyst and hydrodesulfurization catalyst are all produced by Zibo Qimao Catalyst Co., L...
Embodiment 2
[0075] The residual oil was treated in the same way as in Example 1, except that in step (2), the feed oil was catalytically cracked heavy diesel oil with an initial cut-off temperature of 240°C and a final distillation cut-off point of 350°C. After hydrogenation, it is obtained by mixing the residue hydrogenated tail oil with the same weight ratio as in Example 1.
[0076] The product distribution of the FCC products obtained is listed in Table 2.
[0077] Table 2
[0078]
[0079] ① : Light oil yield = liquefied petroleum gas + FCC gasoline + FCC light diesel oil
[0080] ② : is the weight ratio of residue hydrogenated tail oil / catalytically cracked heavy diesel oil
[0081] As can be seen from Table 2, when other conditions are the same, in Example 1, catalytic cracking is carried out by mixing catalytically cracked heavy diesel oil with residue hydrogenated tail oil after hydrogenation, and the yield of light oil reaches 71.03% by weight. Increased by 6.45% by weig...
Embodiment 3
[0088] The residual oil is treated in the same way as in Example 1, the difference is that in step (1), residual oil raw material B is used instead of residual oil raw material A; in step (2), the raw material oil is residual oil hydrogenated tail oil and The mixture obtained by mixing catalytic cracking heavy diesel oil after hydrogenation at a weight ratio of 90:10.
[0089] The conditions of residue hydrotreating, catalytic cracking and diesel hydrofinishing and the product distribution of the obtained catalytic cracking products are listed in Table 4.
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