Catalyzing distillation method for gasoline alkylate desulfuration

A technology of alkylation desulfurization and catalytic distillation, which is applied in hydrocarbon distillation, petroleum industry, refined hydrocarbon oil, etc. It can solve the problem of low conversion rate of thiophene and achieve the effects of easy control of the process, mild operating conditions, and accelerated reaction and separation

Active Publication Date: 2009-12-09
PETROCHINA CO LTD
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  • Abstract
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Problems solved by technology

When this method uses whole distillate as raw m

Method used

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  • Catalyzing distillation method for gasoline alkylate desulfuration
  • Catalyzing distillation method for gasoline alkylate desulfuration
  • Catalyzing distillation method for gasoline alkylate desulfuration

Examples

Experimental program
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Example Embodiment

[0023] Example 1

[0024] Combine figure 1 , The process of the present invention is further explained.

[0025] The catalytic distillation tower is divided into four parts: the upper reaction section 31, the lower reaction section 32, the rectification section 33 and the stripping section 34. The FCC gasoline feedstock is connected to the preconditioner 10 through the pipeline 101, and then connected between the upper reaction section 31 and the lower reaction section 32 of the catalytic distillation tower 30 through the pipeline 102, and the pipeline 106 for supplementing C3-C5 olefins and the bottom of the lower reaction section 32 In connection, the diesel or high boiling point hydrocarbon oil pipeline 105 is connected to the stripping section 34 of the catalytic distillation column 30. The top steam is connected to the total condenser through a pipe 201, and the pipe 202 is connected to the distillate outlet of the catalytic distillation column 30. The pipes 203 and 204 are ...

Example Embodiment

[0028] Example 2

[0029] Knot and attach figure 2 , The process of the present invention is further explained.

[0030] The catalytic distillation tower is divided into four parts: the upper reaction section 31, the lower reaction section 32, the rectification section 33 and the stripping section 34. The FCC gasoline feedstock is connected to the preconditioner 10 through the pipeline 101, and then connected between the upper reaction section 31 and the lower reaction section 32 of the catalytic distillation tower 30 through the pipeline 102, and the pipeline 106 for supplementing C3-C5 olefins and the bottom of the lower reaction section 32 connection. The top steam is connected to the total condenser through a pipe 201, and the pipe 202 is connected to the distillate outlet of the catalytic distillation column 30. The bottom of the catalytic distillation tower 30 is connected to the middle of the fractionation tower 40 through pipelines 203 and 204 after being merged with the p...

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Abstract

The invention relates to a catalyzing distillation method for gasoline alkylate desulfuration. The method comprises the following steps: gasoline containing sulfur is added into a catalyzing distillation tower; under the action of a solid acid catalyst, olefin in the gasoline and sulfide carry out alkylate reaction to generate a sulfocompound with a higher boiling point; fractionation is carried out on diesel oil or high-boiling-point hydrocarbon oil and the gasoline in a distillation tower, the high-boiling-point sulfocompound is transferred from the gasoline to the diesel oil or the high-boiling-point hydrocarbon oil by the fractionation; and the desulfurized gasoline is extracted from the top of the distillation tower; the operation pressure of the catalyzing distillation tower is 0.1-0.5MPa, the temperature of a reaction area is 80-200 DEG C, and the airspeed of the liquid is 0.1h<-1> to 20h<-1>. The invention reduces a gasoline hydrodesulfurizing device, effectively removes the sulfide in the gasoline without losing the octane number and achieves the double purposes of desulfuration and olefin reduction. The invention has the advantages of mutual promotion of reaction and separation, energy saving, little constructing investment, mild operation condition and easy control of the process.

Description

technical field [0001] The invention relates to a catalytic distillation method for gasoline alkylation desulfurization using olefin contained in gasoline as an alkylating agent. Background technique [0002] At present, catalytic cracking (FCC) gasoline accounts for more than 75% of gasoline in my country, and brings more than 90% of sulfur impurities into finished gasoline. Therefore, the production of clean gasoline products requires a substantial reduction in the sulfur content of FCC gasoline. Among the sulfides contained in FCC gasoline, mercaptans and thioethers are less, and thiapanes account for more than 80% of the total sulfides. Hydrodesulfurization (HDS) is a widely used FCC gasoline desulfurization technology at present. It can remove many kinds of sulfides and high reaction conversion rate, but the olefins in the light fraction are easily saturated at the same time, which reduces the octane number of gasoline. Alkylation desulfurization refers to contacting ...

Claims

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Application Information

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IPC IPC(8): C10G7/00C10G29/00
Inventor 李永红沈昕伟于春梅王路海张文成刘莉王明友
Owner PETROCHINA CO LTD
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