Hydrocarbon catalytic conversion method of productive low-carbon olefin and light aromatic hydrocarbon

A technology for low-carbon olefins and light aromatics, applied in the field of catalytic conversion of hydrocarbons, which can solve the problems of increasing catalytic cracking propylene, which is limited and does not involve improving selectivity, and achieves the effect of suppressing hydrogen transfer reaction and high process flexibility

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the above technologies have made significant progress in increasing the yield of catalytic cracking propylene, their limitations in increasing the selectivity and yield of catalytic cracking propylene are still very large, and they do not involve increasing the cracking of light oil to generate light olefins and light aromatics selectivity

Method used

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  • Hydrocarbon catalytic conversion method of productive low-carbon olefin and light aromatic hydrocarbon
  • Hydrocarbon catalytic conversion method of productive low-carbon olefin and light aromatic hydrocarbon
  • Hydrocarbon catalytic conversion method of productive low-carbon olefin and light aromatic hydrocarbon

Examples

Experimental program
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Effect test

Embodiment 1

[0092] The cracking catalyst used in this embodiment is: based on the total weight of the cracking catalyst, the cracking catalyst used contains 10% by weight of beta zeolite, 20% by weight of ZSM-5 zeolite (the ratio of silicon to aluminum is 40), 45% 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 cracking catalyst is aged for 10 hours at 800°C and 100% water vapor atmosphere, and the catalyst loading in the device (system catalyst storage) is 60 kg.

[0093] The heavy hydrocarbon oil raw material (its properties are shown in Table 1) is introduced into the riser reactor 1, and after being contacted with the hot catalyst from the regenerator 6, the reaction oil gas is separated from the catalyst, and the reaction oil gas leaves the reactor and is introduced into the fractionation device, separated The obtained coke catalyst is introduced into the strippe...

Embodiment 2

[0095] The process flow and the cracking catalyst used in this example are the same as in Example 1, except that light gasoline (see Table 2 for properties) is used at a reaction temperature of 40°C, a reaction pressure of 0.5MPa, and a molar ratio of hydrogen to olefins of 4:1. After selective hydrogenation reaction on the hydrogenation catalyst (purchased from Sinopec Changling Catalyst Branch, the brand is RDD-1), dienes and alkynes are converted into monoolefins and introduced into riser reactor 2, and the remaining reaction conditions and The reaction results are shown in Table 4.

Embodiment 3

[0101] The flow process of this embodiment is the same as that of Example 1. The difference is that the cracking catalyst used is: based on the total weight of the cracking catalyst, the cracking catalyst used contains 15% by weight of zeolite beta, 15% by weight of ZSM-5 zeolite (silicon Aluminum ratio is 40), 45% by weight of kaolin and 25% by weight of alumina binder, wherein, zeolite beta contains 1% by weight of iron and 1.5% by weight of phosphorus in terms of elements; and, reaction conditions and reaction results See Table 6.

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Abstract

The invention relates to a hydrocarbon catalytic conversion method of productive low-carbon olefin and light aromatic hydrocarbon. The method comprises steps as follows: a heavy hydrocarbon raw material and a cracking catalyst are contacted in a first reactor and have a catalytic cracking reaction, a first carbon deposit catalyst and a first reaction product are obtained through separation; a light hydrocarbon raw material is injected from the upstream part of a second reactor, a medium hydrocarbon raw material is injected from the middle of the second reactor, and the mixture has a catalytic cracking reaction; a reaction mixture produced in the second reactor is introduced to the third reactor and continuously has a reaction, and a second carbon deposit catalyst and a second reaction product are obtained through separation; the cracking catalyst adopts a cracking catalyst containing modified beta zeolite, and the modified beta zeolite adopts phosphorus and transition metal M modified beta zeolite. With adoption of the method, higher propylene yield and light aromatic hydrocarbon yield can be obtained.

Description

technical field [0001] The invention relates to a method for catalytic conversion of hydrocarbons with high yields of low-carbon olefins and light aromatics. Background technique [0002] Ethylene, propylene and light aromatics (benzene, toluene and xylene, referred to as BTX) are basic chemical raw materials. At present, ethylene and propylene mainly come from ethane, propane, butane, LPG, condensate oil, naphtha, hydrogenation Steam thermal cracking of cracked tail oil and gas oil and catalytic cracking of hydrocarbon oil, BTX mainly comes from light hydrocarbon reforming process and steam thermal cracking process. As steam cracking uses new light raw materials, product distribution will change. For example, when ethane is used as raw material for steam cracking, compared with naphtha as raw material, the proportion of ethylene in the product is significantly increased, while the production of propylene and aromatics rate will decrease. In this context, the use of heavy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06
CPCC10G55/00
Inventor 朱根权谢朝钢孙益群
Owner CHINA PETROLEUM & CHEM CORP
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