Catalytic cracking method for producing high aromatic hydrocarbon oil and productive liquefied gas

A catalytic cracking, high aromatics technology, applied in the treatment of hydrocarbon oil, multi-stage series-connected refining and cracking process treatment, petroleum industry, etc. It can solve the problems of high equipment investment and operating costs, improve product distribution, and increase reaction temperature. , the effect of meeting the needs

Pending Publication Date: 2021-11-30
SHANGHAI NAKE AUXILIARIES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] CN112725031A discloses a kind of "oil suitable for the production of needle coke and its preparation method and system", in which catalytic cracking oil slurry or catalytic cracking clarified oil or other raw materials are fractionated through a distillation tower to obtain crude wax oil and tower bottom oil, and then Four times of steam stripping, hydrogenation, polycondensation and other processes to obtain needle coke raw materials, equipment investment and operating costs are very high
Even if the scheme is feasible, it is only suitable for deep single-pass cracking without producing oil slurry macromolecular components, not to mention that there is no public report on the method of increasing the reaction depth that can achieve such a purpose

Method used

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  • Catalytic cracking method for producing high aromatic hydrocarbon oil and productive liquefied gas
  • Catalytic cracking method for producing high aromatic hydrocarbon oil and productive liquefied gas
  • Catalytic cracking method for producing high aromatic hydrocarbon oil and productive liquefied gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Such as figure 1 As shown, the FCC feedstock oil and the catalytic cracking catalyst undergo a catalytic cracking reaction in the riser reactor 7 to form reaction oil gas. The operating conditions of the catalytic cracking reaction are shown in Table 2 below.

[0092] Such as figure 1 As shown, the reaction oil gas from the reaction unit is fed to below the washing and desuperheating section of the catalytic cracking fractionation tower 2, and the reaction oil gas is fully contacted with the FCC feedstock oil in the washing and desuperheating section 13 to elute the reaction oil gas containing catalyst powder. The operating conditions of the fractionation tower are shown in Table 2 below.

[0093] In the fractionation tower, high-aromatic oil, heavy diesel oil (as required) and light diesel oil are extracted sequentially from bottom to top, and gasoline, liquefied gas and dry gas are obtained through subsequent absorption and stabilization unit separation. The pro...

Embodiment 2-3

[0095] According to the conditions described in Table 2, the steps similar to those described in Example 1 were used to prepare high aromatics oil. The product distribution of Examples 2-3 can be seen in Table 2 below. Moreover, the properties of the high aromatics oil produced in Example 2-3 are shown in Table 2 below. Its liquefied gas composition is shown in Table 2a.

[0096] Table 2

[0097]

[0098]

[0099] Table 2a

[0100]

Embodiment 4-6

[0102] According to the conditions described in Table 3, the steps similar to those described in Example 1 were used to prepare high aromatics oil. The product distribution of Examples 4-6 can be seen in Table 3 below. Moreover, the properties of the high aromatics oil produced in Examples 4-6 are shown in Table 3 below. Its liquefied gas composition is shown in Table 3a.

[0103] table 3

[0104]

[0105]

[0106]

[0107] Table 3a

[0108]

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PUM

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Abstract

The invention relates to a catalytic cracking method for producing high aromatic hydrocarbon oil and productive liquefied gas. The method comprises the following steps: (1), carrying out catalytic cracking reaction on less than or equal to 99 wt% of FCC raw oil to generate oil gas; (2), introducing the oil gas below a washing and desuperheating section of the fractionating tower, and carrying out countercurrent contact with more than or equal to 1 wt% of residual FCC raw oil so as to elute the catalyst powder; (3), enabling the eluted oil gas to rise along the fractionating tower, enter a plate section of the fractionating tower and be in countercurrent contact with reflux liquid; (4), extracting a high aromatic hydrocarbon oil from the side stream, the high aromatic hydrocarbon oil containing ash less than 20 mu g / g; (5), carrying out catalytic cracking reaction on washing raw oil containing catalyst powder and the FCC raw oil in the step (1) to generate oil gas; and (6), repeating the steps (2)-(5) to form a cycle, the catalytic cracking reaction temperature being 1-80 DEG C higher than the reaction temperature of an existing device, and more than or equal to 97 wt% of oil gas entering the high aromatic hydrocarbon oil extraction plate. According to the method, the liquefied gas is produced while the high aromatic hydrocarbon oil is produced, the process is simple, the equipment investment is low, and the operation cost is greatly reduced.

Description

technical field [0001] The invention relates to the field of petroleum refining, in particular to a catalytic cracking method for producing high-aromatic oil stocks and prolific liquefied gas. [0002] technical background [0003] Catalytic cracking is one of the most important lightening processes and the main source of profit in the oil refining industry. Its main products are divided into gasoline, diesel, liquefied gas, dry gas, oil slurry and other products through fractionation towers and absorption stabilization systems. In the early years of catalytic cracking of wax oil, due to the light raw material and low yield of oil slurry, the oil slurry was basically used for refining, and no oil slurry product was produced. The current catalytic cracking unit basically uses heavy raw materials, in which the oil slurry yield is high, and full or most of the back refining will lead to a high coke yield in the system, which reduces the catalyst activity, deteriorates product d...

Claims

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Application Information

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IPC IPC(8): C10G55/06
CPCC10G55/06C10G2300/70
Inventor 陆明全陆善祥李明晖
Owner SHANGHAI NAKE AUXILIARIES
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