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Production of propene and high-quality gasoline and diesel oil by two-stage catalyzed crack

A catalytic cracking, gasoline and diesel technology, applied in the field of diesel with a higher cetane number, can solve the problems of increased yield of dry gas and coke, deterioration of diesel quality, difficulty in propylene exceeding 15%, and achieve the effect of improving quality

Active Publication Date: 2007-11-21
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also difficult for this type of technology to produce propylene with respect to heavy oil raw materials than 15%, otherwise it will also face the problem that the yield of dry gas and coke will increase significantly, and the quality of light oil products, especially diesel oil, will deteriorate sharply

Method used

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  • Production of propene and high-quality gasoline and diesel oil by two-stage catalyzed crack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 On the two-stage riser pilot plant in the laboratory, the atmospheric residue raw material (see Table 1 for properties) of Daqing crude oil taken from Fushun Petrochemical Company was used, and the LTB-2 catalyst with a ZSM-5 molecular sieve content of 30% was used (taken from Dongying Hanyi Chemical Co., Ltd.), the raw material of the first stage is atmospheric residual oil, and the raw material of the second stage is gasoline and cycle oil. Under the condition that the outlet temperature of the two-stage riser reactor is 520 ° C, the yield of propylene reaches 20.5%, butene yield was 18.6%, gasoline and diesel yields were 24.0% and 18.5%, and dry gas and coke yields were 7.0% and 5.5%, respectively. The gasoline produced by the reaction has a low olefin content (30%), a high aromatic content (35.8%), and a research octane number of 93; at the same time, the quality of diesel oil is also well protected, and its cetane number is 30.2.

[0026] If the obtained ...

Embodiment 2

[0028] Example 2 On the two-stage riser pilot plant in the laboratory, the heavy feed oil (see Table 2 for properties) from the 1.4 million tons / year catalytic cracking unit of Lanzhou Petrochemical Company was used, and the ZSM-5 molecular sieve content was 20%. LTB-1 catalyst (taken from Dongying Hanyi Chemical Co., Ltd.), the raw material of the first stage is heavy feedstock oil, the raw material of the second stage is gasoline and cycle oil, and the outlet temperatures of the two-stage riser reactors are 510 ° C and 525 ° C respectively Under the conditions, the yield of propylene is 15%, the yield of butene is 14.5%, the yields of gasoline and diesel oil are 25.0% and 22.6% respectively, and the yields of dry gas and coke are 4.5% and 9.5% respectively.

[0029] Original

material

sex

quality

Density (20℃), g / cm 3

0.9134

Carbon residue, m%

5.69

four components

m%

Saturation

52.71

...

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Abstract

A method for producing propylene and gasoline diesel-oil by two-section catalyzed cracking style is carried out by adopting two-section lift pipe catalyzing process and catalyst with molecular sieve, taking heavy petroleum hydrocarbon or various animal and vegetable oils containing hydrocarbon as raw materials, optimization combining by charging style for various reactants, and controlling proper reactive conditions. It can improve propene and light-oil recovery rate and quality, and inhibit to generate dry gas and coke.

Description

technical field [0001] The invention relates to a new technology for heavy oil circulating fluidized bed catalytic cracking integrated with refining and chemical industry. The technology is mainly through the optimization of the process plan and the matching of suitable catalysts to realize the effective control of the reactions of different reactants. Low-carbon olefins (especially propylene) can be used to obtain gasoline with low olefin content and high octane number, and diesel with a higher cetane number. Background technique [0002] Propylene is an important basic raw material for organic synthesis, and the market demand is increasing year by year. At present, the main source of propylene (about 70%) is still the steam cracking ethylene production process using light petroleum hydrocarbons such as naphtha, light diesel oil, and liquefied petroleum gas as raw materials. It is difficult to greatly increase the yield of propylene; due to the intervention of the catalyst...

Claims

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Application Information

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IPC IPC(8): C10G11/02C07C11/06
CPCY02P20/52
Inventor 杨朝合李春义山红红张建芳马安阎立军钮根林涂永善
Owner PETROCHINA CO LTD
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