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Catalytic conversion method for preparing light fuel oil and propylene

A light fuel oil, catalytic conversion technology, applied in catalytic cracking, cracking, organic chemistry, etc., can solve the problems of dry gas and coke yield increase, and achieve the reduction of oil slurry yield, increase of operation cycle, and improvement of properties Effect

Active Publication Date: 2012-12-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventor found through creative thinking and repeated experiments that the conversion rate of heavy oil catalytic cracking is not as high as possible. When the conversion rate reaches a certain level, the target product increases little, but the yield of dry gas and coke increases greatly.

Method used

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  • Catalytic conversion method for preparing light fuel oil and propylene
  • Catalytic conversion method for preparing light fuel oil and propylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0044] The preferred technical solution of this embodiment comprises the following steps:

[0045] (1) The preheated inferior raw material oil enters the first reaction zone of the first reactor to contact with the hot regenerated catalyst, the reaction temperature is 510°C-650°C, preferably 520°C-600°C, and the reaction time is 0.05 seconds ~1.0 second is preferably 0.1 second~0.5 seconds, the weight ratio of catalyst and feedstock oil (hereinafter referred to as agent-oil ratio) is 3~15:1, preferably 4~12:1, the weight ratio of steam and feedstock oil ( hereinafter referred to as water-oil ratio) is 0.03-0.3:1, preferably 0.05-0.2:1, and the pressure is 130kPa-450kPa; (3) One or more of the catalytic wax oil after the hydrogenation, the raffinate oil of the catalytic wax oil described in step (3) are mixed and then go up to the second reaction zone of the first reactor, at the reaction temperature Cracking reaction, hydrogen transfer reaction and isomerization reaction are ...

Embodiment approach 2

[0050] The preferred technical solution of this embodiment comprises the following steps:

[0051] (1) The preheated inferior raw material oil enters the first reaction zone of the first reactor to contact with the hot regenerated catalyst, the reaction temperature is 510°C-650°C, preferably 520°C-600°C, and the reaction time is 0.05 seconds ~1.0 second is preferably 0.1 second~0.5 seconds, the weight ratio of catalyst and feedstock oil (hereinafter referred to as agent-oil ratio) is 3~15:1, preferably 4~12:1, the weight ratio of steam and feedstock oil ( hereinafter referred to as water-oil ratio) is 0.03-0.3:1, preferably 0.05-0.2:1, and the pressure is 130kPa-450kPa; (3) One or more of the catalytic wax oil after the hydrogenation, the raffinate oil of the catalytic wax oil described in step (3) are mixed and then go up to the second reaction zone of the first reactor, at the reaction temperature Cracking reaction, hydrogen transfer reaction and isomerization reaction are ...

Embodiment 1

[0077] This example follows the attached figure 1 The process of vacuum residue oil A is used as the raw material for catalytic cracking, and the test is carried out on the medium-sized device of the riser reactor. The inferior raw material enters the bottom of the first riser reaction zone I, contacts with the catalyst GZ-1 and occurs Reaction, at the bottom of reaction zone I, poor-quality raw materials at a reaction temperature of 600°C and a weight hourly space velocity of 100h -1 , the weight ratio of catalyst to raw material is 6, and the weight ratio of steam to raw material is 0.05, and the cracking reaction is carried out; in the first riser reaction zone II, oil gas is mixed with circulating propane, C4 hydrocarbons and diesel oil at a reaction temperature of 500°C , weight hourly space velocity 30h -1 The cracking reaction is carried out under the condition that the weight ratio of water vapor to raw material is 0.05, the oil gas and the catalyst to be charred are ...

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Abstract

The invention relates to a catalytic conversion method for preparing light fuel oil and propylene, comprising: leading inferior crude oil to enter a catalytic conversion reactor to be contacted with catalyst and have reaction; separating the reaction product, and obtaining the product containing the propylene, crude gasoline and catalytic wax oil, wherein leading the crude gasoline to enter another catalytic conversion reactor to be contacted with catalytic conversion catalyst to have reaction; treating the catalytic wax oil by hydrotreating or / and solvent extraction; and taking the catalyticwax oil obtained by hydrotreating or / and raffinate oil of the catalytic wax oil as raw material of the catalytic conversion reactor or other catalytic conversion reactors. In the method, after the catalytic wax oil which is obtained by carrying out mild catalytic conversion on the inferior crude oil is treated by hydrotreating or / and solvent extraction, the obtaining catalytic wax oil obtained byhydrotreating or / and raffinate oil contains alkane or cycloparaffin, and is very suitable for catalytic conversion, thus realizing high efficiency utilization of oil resources.

Description

technical field [0001] The present invention belongs to the catalytic conversion method of hydrocarbon oil, more specifically, is the method for converting inferior raw material into a large amount of light fuel oil and propylene by the combination of catalytic cracking of hydrocarbon oil and hydrotreating / solvent extraction process. Background technique [0002] The quality of crude oil is getting worse with the continuous increase of crude oil extraction, mainly manifested in the increase of crude oil density, viscosity, heavy metal content, sulfur content, nitrogen content, colloid and asphaltene content and acid value. At present, the price difference between low-quality crude oil and high-quality crude oil is also increasing with the shortage of oil resources, resulting in more and more attention to low-priced low-quality crude oil extraction and processing methods, that is, to increase as much as possible from low-quality crude oil. The yield of light oil has brought h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/00C07C11/06C07C4/06
CPCY02P20/52Y02P20/584
Inventor 崔守业许友好龚剑洪张执刚马建国程从礼刘守军杨轶男
Owner CHINA PETROLEUM & CHEM CORP
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