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Method for lowering sulfur and olefin content in gasoline

A technology for olefin content and gasoline, which is applied in the field of producing clean gasoline components, and can solve problems such as reducing olefin content and sulfur content, and complex processes

Active Publication Date: 2011-09-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another method is to select an appropriate process to reduce the olefin content and sulfur content in the oil, the process is more complicated

Method used

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  • Method for lowering sulfur and olefin content in gasoline
  • Method for lowering sulfur and olefin content in gasoline
  • Method for lowering sulfur and olefin content in gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Gasoline feedstock with 40wt% olefin content (see Table 1 for properties) was contacted with adsorbent AZ-1 in a small continuous fluidized bed reactor for desulfurization reaction. The composition of AZ-1 is: Al 2 o 3 12.5%, SiO 2 10%, ZnO 55%, NiO 22.5%, the reaction conditions are: the reaction temperature is 400°C, the reactor pressure is 2.5Mpa, and the weight hourly space velocity of the gasoline raw material is 4h -1 , hydrogen is used as the hydrogen donor, and the volume ratio of hydrogen to gasoline raw materials is 70. The desulfurized product obtained from the top of the reactor is cooled and separated to obtain a liquid product. The regeneration temperature of the catalyst is 550°C, and the adsorbent is cooled to 340°C and returned to the reactor for recycling. The olefin content in the product gasoline was 25% by weight.

Embodiment 2

[0039] Gasoline feedstock with 40wt% olefin content (see Table 1 for properties) was contacted with adsorbent AZ-1 in a small continuous fluidized bed reactor for desulfurization reaction. The reaction conditions are: the reaction temperature is 430°C, the reactor pressure is 2.2Mpa, and the weight hourly space velocity of the gasoline raw material is 4h -1 , hydrogen is used as the hydrogen donor, and the volume ratio of hydrogen to gasoline raw materials is 100. The desulfurized product obtained from the top of the reactor is cooled and separated to obtain a liquid product. Part of the adsorbent is taken out from the middle and upper part of the reactor into the external heat extractor 9, and the heat is taken to cool down to 380°C, and then returned to the reactor through two inlets in the middle and lower part of the reactor for circulation, and the regeneration temperature of the catalyst is 550°C. The olefin content in the resulting product gasoline was 21% by weight. ...

Embodiment 3

[0041] This example illustrates the adsorbent A used in the pretreatment step and its preparation.

[0042] Extrude 400g of aluminum hydroxide powder (SB powder, product of Codea, Germany) into a φ1.4mm cylindrical strip on an extruder, dry the wet strip in an oven at 120°C for 2 hours, and then roast it in a tube furnace at 600°C with air 4 hours to obtain the vector.

[0043] 400gNi(CH 3 COO) 2 4H 2 O was dissolved with 18wt% ammonia water, the dissolved volume was 800ml, pH=9.0. Put 200 g of the aforementioned carrier in 400 ml of the solution and soak for 4 hours, and filter off the remaining soaking liquid. The dipped wet strips were dried in an oven at 120°C for 2 hours. Roast in air at 400° C. in a tube furnace for 4 hours, and the above impregnation and roasting are repeated twice. Afterwards, vulcanization is carried out at a pressure of 1.2MPa and a weight hourly space velocity of 10hr -1 , temperature is 290 ℃, under the condition that the volume ratio of hyd...

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Abstract

The invention relates to a method for lowering the sulfur and olefin content in gasoline, which comprises: introducing a preheated gasoline raw material containing more than 35 weight percent of olefin and a hydrogen donor to a fluidized bed reactor to contact the gasoline raw material and the hydrogen donor with an absorber to form desulfurized oil gas and sulfurized absorbent; separating the desulfurized oil gas and sulfurized absorbent; delivering the separated oil gas to a subsequent separation system for product separation; and regenerating and reducing the sulfurized absorbent and returning the sulfurized absorbent to the reactor. The fluidized bed reactor is provided with a heater and / or devices for cooling the reduced absorbent and returning the reduced absorbent to the reactor. When the method is used to process a high-olefin gasoline raw material, deep desulfurization can be realized under a low hydrogen consumption condition, and the olefin content in the gasoline can be lowered considerably.

Description

technical field [0001] The invention relates to a method for reducing the content of sulfur and olefins in gasoline, in particular to a method for simultaneously reducing the contents of sulfur and olefins in gasoline under hydrogen-facing conditions to produce clean gasoline components. Background technique [0002] As people pay more and more attention to environmental protection, the standard requirements for gasoline are getting higher and higher all over the world. The restrictions on olefins and sulfur content in gasoline are becoming more and more stringent. In Europe, the Euro IV gasoline index has been implemented, and its olefin volume content is required to be no more than 18%. No more than 30%, and it is required to be implemented nationwide before December 31, 2009; and the upcoming National IV gasoline standard, the volume content of olefins is required to be no more than 25%, and it has already been implemented in Beijing and other big cities. For the sulfur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/04C10G45/12C10G45/08C10G49/04C10G49/02C10G49/08
Inventor 徐莉刘宪龙许友好谢朝钢梅智鹏张久顺
Owner CHINA PETROLEUM & CHEM CORP
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