Device and method for producing high-propylene cracking gas and low-olefin gasoline

A technology of propylene content and cracked gas, which is applied in the treatment of hydrocarbon oil, petroleum industry, hydrocarbon oil treatment products, etc. Effect

Inactive Publication Date: 2017-06-27
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN101074392A mentions that light hydrocarbons and heavy oil react in the same riser, which cannot provide optimal operating conditions for the conversion of the two

Method used

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  • Device and method for producing high-propylene cracking gas and low-olefin gasoline

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Experimental program
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Effect test

Embodiment 1

[0080] as attached figure 1 As shown, the embodiment of the present invention provides a device for producing cracked gas G with high propylene content and gasoline with low olefin content, which device includes: a first riser 1, a first settler 2, a first catalytic cracking regenerator 3, First fractionation tower 4, first cooler 5, first gas-liquid separator 6, second riser 7, second settler 8, second catalytic cracking regenerator 9, second fractionation tower 10, second cooler 11. The second gas-liquid separator 12 , the first catalyst pre-lifter 13 , the second catalyst pre-lifter 14 , and the third fractionation device 15 .

[0081] Wherein, the upper outlet of the first riser 1, the middle inlet and the lower catalyst outlet of the first settler 2, the first catalytic cracking regenerator 3, and the catalyst inlet at the bottom of the first riser 1 are connected in sequence, forming the first catalyst regeneration reuse unit. The upper outlet of the second riser 7, the ...

Embodiment 2

[0085] In this embodiment, the device provided in Example 1 is used to produce cracked gas with high propylene content and gasoline with low olefin content, and the specific steps are as follows:

[0086] The heavy oil raw material A preheated to 200°C enters the first riser 1, and under the conditions of a reaction temperature of 530°C and an absolute reaction pressure of 0.24MPa, it is mixed with the first catalyst B1 rectified by the pre-lift medium: super The stabilized molecular sieve catalyst was contacted for 0.8s to generate a catalytic reaction. Among them, the mass ratio of ultra-stable molecular sieve catalyst to heavy oil raw material A is 8:1. The oil and gas products obtained after the catalytic reaction enter the first settler 2 together with the coke-generated ultra-stable molecular sieve catalyst for sedimentation treatment, and the separated coke-generated ultra-stable molecular sieve catalyst enters the first catalytic cracking regenerator 3 at 700°C Carry ...

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Abstract

The invention discloses a device and method for producing high-propylene cracking gas and low-olefin gasoline and belongs to the field of catalytic cracking. In the device, a first lifting pipe outlet, a first settler inlet and catalyst outlet, a first catalytic cracking regenerator and a first lifting pipe catalyst inlet are communicated with each other in turn; a second lifting pipe outlet, a second settler inlet and catalyst outlet, a second catalytic cracking regenerator and a second lifting pipe catalyst inlet are communicated with each other in turn; and a first settler oil gas outlet, a first fractionating tower raw material inlet and gas phase outlet, a first cooler, a first gas-liquid separator inlet and liquid phase outlet, a second lifting pipe raw material inlet and outlet, a second settler inlet and oil gas outlet, a second fractionating tower raw material inlet and gas phase outlet, a second cooler and a second gas-liquid separator are communicated with each other in turn. The device provided by the invention adopts different catalysts for heavy oil and light oil, is capable of increasing the catalytic selectivity and is capable of obtaining the high-propylene cracking gas and the low-olefin gasoline.

Description

technical field [0001] The invention relates to the field of catalytic cracking, in particular to a device and a method for producing cracked gas with high propylene content and gasoline with low olefin content. Background technique [0002] Catalytic cracking is a common petroleum refining process. Under the action of heat and a catalyst, heavy oil undergoes a cracking reaction and is converted into cracked gas containing ethylene, propylene, etc., gasoline and diesel oil. Compared with the traditional steam cracking process that uses light naphtha such as naphtha, light diesel oil, and liquefied petroleum gas as raw materials, catalytic cracking can usually obtain more low-carbon olefins, especially cracked gas with higher propylene content , which has the advantages of wide range of raw materials, high propylene / ethylene ratio, low energy consumption, mild operating conditions, and low production cost. Among them, propylene is an important basic organic synthetic raw mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06
CPCC10G55/06C10G2300/706C10G2400/02C10G2400/20
Inventor 郝希仁张星李春义张强
Owner BC P INC CHINA NAT PETROLEUM CORP
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