Method for preparing chemicals through crude oil double-pipe series multi-zone catalytic conversion
A catalytic conversion and chemical technology, applied in the production of bulk chemicals, organic chemistry, chemical recovery, etc., can solve the problems of low aromatics content in gasoline, low aromatics content in gasoline, low yield of low-carbon olefins, etc., to reduce coke Yield, increase aromatics content, increase yield effect
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Embodiment 1
[0033] This example takes an upward reaction tube with a swirl structure as an example. After desalination and dehydration, the crude oil is divided into light components and heavy components according to the boiling point after desalination and dehydration, and fractions below 200°C are classified into light components. , The distillate above 200°C is a heavy component.
[0034] see figure 2 In the schematic process flow diagram shown, low-carbon alkanes 121 are injected from the lower part of the first riser reactor 102, and the high-temperature regeneration from the first regenerator 103 is transported by the regeneration inclined pipe 105, and the pre-lifting steam or lifting dry gas 104 is lifted up. Catalyst undergoes contact reaction, reacts for 0.1-5.0s at 600-800°C, agent-oil ratio 5-30, and pressure 0.1-0.4MPa, then leaves the light alkane reaction zone 123 and enters the first heavy oil reaction zone 124. The bottom of the reaction zone 124 is mixed with crude oil...
Embodiment 2
[0036] The upward reaction tube with swirl feed structure is adopted, and the crude oil is directly fed.
[0037] see figure 2 In the schematic process flow diagram shown, low-carbon alkanes 121 are injected from the lower part of the first riser reactor 102, and the high-temperature regeneration from the first regenerator 103 is transported by the regeneration inclined pipe 105, and the pre-lifting steam or lifting dry gas 104 is lifted up. Catalyst undergoes contact reaction, reacts for 0.1-5.0s at 600-800°C, agent-oil ratio 5-30, and pressure 0.1-0.4MPa, then leaves the light alkane reaction zone 123 and enters the first heavy oil reaction zone 124. The bottom of the reaction zone is mixed with crude oil 101 preheated to 150-250°C, reacted at 500-700°C, agent-oil ratio 5-30, and pressure 0.1-0.4MPa for 0.1-5.0s, then enters the gas-solid separator 106 for For the separation of the oil agent, the reaction oil gas 107 is injected into the second reaction tube to continue th...
Embodiment 3
[0039] A descending reaction tube with a swirling feed structure is adopted. After desalination and dehydration, the crude oil is divided into light components and heavy components according to the boiling point after desalination and dehydration, and fractions greater than 200°C °C fractions are heavy components. For the specific process, refer to Example 1.
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