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A kind of catalytic cracking method

A catalytic cracking and catalyst technology, which is applied in the field of catalytic cracking, can solve the problems of increasing the yield of catalytic cracking butenes, such as the limitation, and achieve the effect of improving the conversion capacity of heavy oil, improving flexibility and increasing conversion rate

Active Publication Date: 2021-08-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although the above technologies have made significant progress in increasing the yield of catalytic cracking propylene, their limitations in increasing the yield of catalytic cracking butene are still very large

Method used

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  • A kind of catalytic cracking method
  • A kind of catalytic cracking method
  • A kind of catalytic cracking method

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specific Embodiment approach

[0057] A specific embodiment, the catalytic cracking method of the present disclosure is in figure 1 Implement in the catalytic cracking unit shown, specifically, this catalytic cracking unit comprises riser reactor 1 (being the first reactor) and fluidized bed reactor 2 (being the second reactor) and settler 3, described The riser reactor 1, the fluidized bed reactor 2 and the settler 3 are arranged side by side.

[0058] In preferred cases, such as figure 1 As shown, the catalytic cracking unit implementing the method of the present disclosure includes: a riser reactor 1, a fluidized bed reactor 2, a settler 3 and a stripper 4, and the fluidized bed reactor 2 and the settler 3 pass through a or multiple channels connected. The fluidized bed reactor 2 communicates with the stripper 4 through one or more channels. Wherein, the riser reactor 1 can be at least one selected from circular tubes with equal diameters, frustum-shaped cylinders, or straight cylinders with 1-6 secti...

Embodiment 1

[0073] The cracking catalyst used in the present embodiment is: on a dry basis and based on the total weight of the catalytic cracking catalyst, the cracking catalyst used contains 10% by weight of zeolite beta, 20% by weight of ZSM-5 zeolite (the ratio of silicon to aluminum is 40 ), 10% by weight of mesoporous silica-alumina material, 35% by weight of kaolin and 25% by weight of alumina binder, wherein the beta zeolite contains 1% by weight of iron and 1.5% by weight of phosphorus in terms of elements. The catalytic cracking catalyst was aged for 10 hours at 800° C. under a 100% water vapor atmosphere, and the catalyst loading in the device (system catalyst inventory) was 60 kg.

[0074] Such as figure 1 As shown, the hydrogenated cracked light oil (composition is shown in Table 1, the distillation range is 240-365 ° C) is injected into the bottom of the riser reactor 1, and is contacted with the regenerated catalyst from the regenerator to carry out the light oil catalytic ...

Embodiment 2

[0076] The flow process and the cracking catalyst used in this example are the same as in Example 1, except that the cracked gasoline (properties are shown in Table 2) is at a reaction temperature of 40°C, a reaction pressure of 0.5MPa, and a molar ratio of hydrogen to olefins of 4:1. On the hydrogenation catalyst (purchased from Sinopec Changling Catalyst Branch Company, the brand is RDD-1), through selective hydrogenation reaction, dienes and alkynes are converted into monoolefins and introduced into riser reactor 2, and the rest of the reaction conditions and The reaction results are shown in Table 4.

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Abstract

The present disclosure relates to a catalytic cracking method, the method comprising: sending the hydroreforming and cracking light oil into the first reaction zone of the first reactor to contact with the catalytic cracking catalyst and carrying out the catalytic cracking reaction of the light oil; The catalyst and oil gas obtained in the cracking reaction are sent together with the heavy hydrocarbon feedstock into the second reaction zone to carry out the heavy hydrocarbon catalytic cracking reaction to obtain the first spent catalyst and the first reaction product; the olefin content is reduced to 30% by weight The above cracked gasoline is sent into the second reactor to contact with the catalytic cracking catalyst and carry out gasoline catalytic cracking reaction to obtain the second spent catalyst and the second reaction product; the first spent catalyst, the first reaction product, the second The second spent catalyst and the second reaction product undergo gas-solid separation. The catalytic cracking process provided by the present disclosure is capable of producing more butenes and light aromatics.

Description

technical field [0001] The present disclosure relates to a catalytic cracking process. Background technique [0002] Butene and light aromatics (benzene, toluene and xylene, referred to as BTX) are basic chemical raw materials. At present, butene mainly comes from MTO, butane, LPG, condensate oil, naphtha, hydrocracking tail oil and crude oil Steam thermal cracking of diesel oil and catalytic cracking of hydrocarbon oil, BTX mainly comes from light hydrocarbon reforming process and steam thermal cracking process. As steam cracking adopts new light raw materials, product distribution will change. For example, when ethane is used as steam cracking raw material, compared with naphtha as raw material, the proportion of ethylene in the product is significantly increased, while butene and light aromatics yield will decrease. In this context, the use of catalytic cracking of heavy hydrocarbon oil to produce butene and light aromatics will be an effective supplementary measure for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G55/06
CPCC10G55/06
Inventor 朱根权谢朝钢马文明成晓洁杨超孙益群
Owner CHINA PETROLEUM & CHEM CORP
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