Chemical oil-refining method for preparing low carbon olefin and arene

A technology for low-carbon olefins and aromatics, applied in the field of catalytic conversion, which can solve problems such as low propylene yield, movement of reforming catalysts, complicated regeneration process, and inability to produce low-carbon olefins and aromatics at the same time

Active Publication Date: 2005-09-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the movement and regeneration process of the reforming catalyst is also relatively complicated
[0010] Some of the above-mentioned existing technologies only produce propylene by-product while producing gasoline and diesel oil, and the yield of propylene is on the low side, not more than 30% by weight. Some of them can only produce aromatics, but they cannot produce low-carbon olefins and aromatics at the same time.

Method used

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  • Chemical oil-refining method for preparing low carbon olefin and arene
  • Chemical oil-refining method for preparing low carbon olefin and arene
  • Chemical oil-refining method for preparing low carbon olefin and arene

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Experimental program
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Effect test

Embodiment 1

[0073] After the raw material oil A is hydrotreated first, the resulting hydrogenated oil (the hydrogen content increases from 12.40% by weight to 13.54% by weight, and the content of aromatics decreases from 44.1% by weight to 20.0% by weight) is used as the raw material for catalytic cracking, and is used as the raw material for catalytic cracking in the medium-sized riser +The test is carried out in a fluidized bed reactor, and finally the product is separated, in which only the oil slurry is circulated to the riser, and other circulating materials are not circulated. The operating conditions and product distribution of hydrotreating and catalytic cracking are shown in Table 2.

[0074] It can be seen from Table 2 that the yields of propylene and ethylene are as high as 32.97% by weight and 12.63% by weight respectively, and the yields of toluene and xylene are 1.93% by weight and 4.05% by weight respectively.

Embodiment 2

[0076] Raw oil B is directly used as raw material for catalytic cracking, and is tested in a medium-sized riser + fluidized bed reactor, and finally the product is separated, and only the oil slurry is circulated to the riser, C 4 -C 6 Circulation to the fluidized bed, other circulating materials are not circulated. The operating conditions and product distribution of catalytic cracking are shown in Table 2.

[0077] It can be seen from Table 2 that the yields of propylene and ethylene are as high as 30.46% by weight and 18.31% by weight respectively, and the yields of toluene and xylene are 2.45% by weight and 7.38% by weight respectively.

Embodiment 3

[0079] After the raw material oil C is hydrotreated first, the resulting hydrogenated oil is used as the raw material for catalytic cracking. The test is carried out in a medium-sized riser + fluidized bed reactor, and finally the product is separated, and all the circulating materials are recycled. Among them, ethane and Propane, C 4 -C 6 1. Pyrolysis gasoline raffinate oil is circulated to the fluidized bed, oil slurry is circulated to the riser, and the circulating oil is returned to the hydrotreating reactor. The operating conditions and product distribution of hydrotreating and catalytic cracking are shown in Table 2.

[0080] It can be seen from Table 2 that the yields of propylene and ethylene are as high as 36.86% by weight and 12.89% by weight respectively, and the yields of toluene and xylene are 3.89% by weight and 10.56% by weight respectively.

[0081] Example 1

[0082] Example 1

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Abstract

This invention is a chemical oil refining method of generating low carbon alkene and arene. Material oil, regenerated catalytic cracking catalyst and vapor are contact to each other in cracking device. On condition of 500~7000C, pressure 0.15~0.4MPa, weight ratio of catalytic cracking catalyst and material oil is 5~50, weight ratio of vapor and material oil is 0.05~0.6, catalyst and reaction oil gas are separated, the catalyst go back to reaction device after regenerated, then the low carbon alkene and arene are got after separating the reaction oil gas. Propylene, ethane and other low carbon alkene is got from heavy feed stock at maximum limit, yield of propylene exceed 30%, and toluene, xylene and other arene are generated at the same time.

Description

technical field [0001] The present invention belongs to the catalytic conversion method of hydrocarbon oil in the absence of hydrogen, more specifically, it is a method for converting heavy raw materials into low-carbon olefins rich in propylene and ethylene and aromatics rich in toluene and xylene Chemical refining method. Background technique [0002] Low-carbon olefins such as ethylene and propylene are important organic chemical raw materials, among which propylene is a synthetic monomer for products such as polypropylene and acrylonitrile. With the rapid growth of demand for derivatives such as polypropylene, the demand for propylene is also increasing year by year. The demand in the world propylene market has increased from 15.2 million tons 20 years ago to 51.2 million tons in 2000, with an average annual growth rate of 6.3%. It is estimated that the demand for propylene will reach 86 million tons by 2010, with an average annual growth rate of about 5.6%. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/00
CPCY02P20/584
Inventor 李大东汪燮卿龙军达志坚舒兴田谢朝钢聂红张久顺
Owner CHINA PETROLEUM & CHEM CORP
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