Catalytic conversion method for reducing olefine, sulfur and nitrogen contents in gasoline

A catalytic conversion method and a technology for olefin content, which are applied in the field of catalytic conversion of petroleum hydrocarbons, and can solve problems such as a decrease in liquid yield and the like

Inactive Publication Date: 2003-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method will convert 2 to 5% by weight of gasoline into polycyclic aromatic hydrocarbons (generally two-ring to five-ring aromatic hydrocarbons) and deposit on the catalyst; if oxygen-containing gas is used for regeneration, this part of polycyclic aromatic hydrocarbons will be burned as coke , will cause a decline in liquid yield; if hydrogen regeneration is used, the polycyclic aromatic hydrocarbons deposited on the surface of the catalyst will be saturated and cracked to produce gasoline and diesel oil. This method has not been reported

Method used

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  • Catalytic conversion method for reducing olefine, sulfur and nitrogen contents in gasoline
  • Catalytic conversion method for reducing olefine, sulfur and nitrogen contents in gasoline

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Experimental program
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Effect test

Embodiment approach A

[0022]Embodiment A: For fixed-bed reactors, two or more fixed-bed reactors can be connected in parallel, wherein some reactors perform reaction, while the rest of the reactors perform regeneration. The preheated gasoline contacts and reacts with the catalyst in the reactor, and the reaction product flows out of the reactor and enters the separation system to separate gasoline and a small amount of dry gas, liquefied gas and diesel. After a reaction cycle, for example, after 0.05 to 60 minutes, the preheated gasoline raw material is cut into the next fixed-bed reactor to continue catalytic conversion, and at the same time, hydrogen is cut into the fixed-bed reactor, and the reactor The polycyclic aromatic hydrocarbons on the internal catalyst are hydrogenated and saturated to remove the polycyclic aromatic hydrocarbons on the catalyst, and the regenerated catalyst is used for the next use.

Embodiment approach B

[0023] Embodiment B: For a fluidized bed reactor, the preheated gasoline contacts and reacts with the microsphere granular catalyst in the reactor, and the reaction product flows out of the reactor and enters the separation system to separate gasoline and a small amount of dry gas and liquefy Gas and diesel oil, the catalyst that deposits polycyclic aromatic hydrocarbons is removed from the reactor and enters the regenerator. In the presence of hydrogen, the polycyclic aromatic hydrocarbons on the catalyst are hydrogenated and saturated, and the polycyclic aromatic hydrocarbons on the catalyst are removed. The regenerated catalyst is recycled to The reactor continues to be used.

[0024] The following examples will further illustrate the present invention, but do not limit the present invention thereby. The properties of the catalyst used in the embodiment and the feedstock oil are listed in Table 1 and Table 2 respectively. Catalyst A listed in table 1 is industrially produc...

Embodiment 1

[0026] This embodiment illustrates: low-quality gasoline can adopt the method provided by the invention on different types of reactors.

[0027] With the gasoline A listed in Table 2 as raw material, the reaction was carried out in a small-scale fixed-bed reactor, and 200 milliliters of catalyst A was housed in this reactor. The test procedure is briefly described as follows: gasoline fraction A is mixed with hydrogen and then enters a fixed-bed reactor. The reaction temperature is 350°C, the reactor pressure is 0.2 MPa, and the weight hourly space velocity is 10 hours. -1 , under the condition that the hydrogen-oil ratio is 0.2, contact with the catalyst for catalytic conversion reaction, the reaction product and hydrogen flow out of the reactor and enter the rear separation system, the polycyclic aromatic hydrocarbons generated during the reaction are deposited on the catalyst, and after 60 minutes of reaction, Stop injecting gasoline, cut into 8.0 MPa of hydrogen, and regen...

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Abstract

The catalytic conversion method for reducing olefin, sulfur and nitrogen contents in the gasoline is characterized by that said method makes the gasoline distillate contact with catalyst containing VIB metal and VIII metal in reactor and makes them react under the following conditions, reaction temp. is 100-600 deg.C, space velocity is 1-120 hr.(-1), weight ratio of catalyst and gasoline distillate is 2-20, volume ratio of hydrogen gas and gasoline distillate is 0-500 and reaction pressure is 0.10-2.5 MPa; then the reaction product and catalyst are separated, the reaction product is fed into subsequence separation system, and the catalyst is undergone the reaction period of 0.05-60 min. and can be regenerated in the presence of hydrogen gas, its regeneration temp. is 100-550 deg.C, regeneration pressure is 0.2-12 MPa and regeneration time is 1-60 min.

Description

technical field [0001] The invention belongs to a catalytic conversion method of petroleum hydrocarbons, more specifically, a catalytic conversion method for reducing the content of olefins, sulfur and nitrogen in gasoline. Background technique [0002] In recent years, the environmental protection regulations of various countries in the world have put forward increasingly strict requirements on the quality of gasoline and diesel, especially the requirements on the olefin content, sulfur content, benzene content and other indicators of gasoline are becoming more and more stringent. Therefore, the requirements from environmental protection have become the main driving force to promote the further development of various refining technologies, and the more traditional catalytic cracking technology is the first to bear the brunt. [0003] The conventional catalytic cracking reaction process mainly includes the following steps: (1) After heat exchange, the fresh raw oil is mixed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G35/04
Inventor 许友好
Owner CHINA PETROLEUM & CHEM CORP
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