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Method for reoving mercaptan from gasoline

A technology for removing mercaptan and gasoline, applied in gasoline stabilization and other directions, can solve the problems of affecting reaction efficiency, inconvenient filling, complex structure, etc., and achieve the effects of improving reaction efficiency, prolonging service life, and high mass transfer.

Inactive Publication Date: 2004-07-14
SINOPEC QILU CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has complex structure, inconvenient filling, high cost, and because the catalyst is packaged in a small bag, the reactants and products must go through a diffusion step to contact or leave the catalyst, which affects the efficiency of the reaction.

Method used

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  • Method for reoving mercaptan from gasoline
  • Method for reoving mercaptan from gasoline
  • Method for reoving mercaptan from gasoline

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] 1. Catalyst Preparation

[0021] Mix commercially available nickel oxide powder with alumina and diatomaceous earth at a weight ratio of 0.65:0.25:0.1, add 0.5 parts of water for kneading, and dry at 120°C for about 1 hour. Control the water content in the material to 5-10 %, after granulation, the ring-shaped carrier is formed, roasted at 550°C for 4 hours, and reduced with hydrogen at 450°C for 10 hours to obtain a ring-shaped bifunctional sweetening catalyst. The basic properties are shown in Table 1:

[0022] shape

circular

diameter, mm

16

height, mm

8

Ring thickness, mm

3.0

Lateral compressive strength, kg / cm

5.0

Pore ​​volume, ml / g

0.35

Specific surface, m 2 / g

60

Nickel content, wt%

51.6

[0023] 2. Sweetening reaction

[0024] React by the technique shown in Fig. 1, and process condition is listed in table 2. The preparation of the cat...

example 2

[0027] 1. Catalyst Preparation

[0028] Add 1M nickel nitrate solution dropwise to 1M sodium carbonate solution to precipitate basic nickel carbonate, the precipitation temperature is 85°C, and the final pH value of the solution is 7.5. The obtained precipitate is washed with deionized water, and the sodium content in the material is less than 0.2%. The material was dried at 120°C for 2 hours, then calcined at 550°C for 5 hours, and the obtained nickel oxide was mixed with alumina and diatomaceous earth in a ratio of 0.50:0.40:0.1. The other processes were the same as in Example 1 to obtain a cyclic bifunctional The basic properties of the catalyst are shown in Table 3.

[0029] shape

circular

diameter, mm

16

height, mm

8

Ring thickness, mm

3.0

Lateral compressive strength, kg / cm

9.0

Pore ​​volume, ml / g

0.35

Specific surface, m 2 / g

70

Nickel content, %(m / m)

...

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PUM

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Abstract

The present invention provides a kind of method for removing mercaptan from gasoline. FCC gasoline containing C4-C12 fractions and proper amount of hydrogen are fed to fixed bed reactor, so that mercaptan in gasoline is reacted with diene to produce sulfide with relatively high boiling point. The reaction product is made to enter the catalytic distillation tower filled with double-functional mercaptan-removing catalyst to eliminate mercaptan from light gasoline, and the reaction produced sulfide and heavy fraction are drained from the bottom of the tower.

Description

technical field [0001] The invention relates to a method for removing mercaptans in gasoline, in particular, the present invention relates to a method for removing mercaptans in gasoline by using a dual-function catalyst having the functions of removing mercaptans and fractionating. Background technique [0002] Impurities such as mercaptans in gasoline have become harmful substances to the environment in automobile exhaust. [0003] The commonly used demercaptan methods include catalytic oxidation (Merox), molecular sieve refining, fiber bundle refining and electrochemical refining. Among them, the Merox method of UOP in the United States and the Merkel Pu method of Howe-Baker Engineering Company are widely used. [0004] A small amount of oxygen is dissolved in gasoline after sweetening by catalytic oxidation method, and diolefins and basic nitrogen compounds in gasoline are easy to form colloid under the action of oxygen, which is not conducive to the storage of gasoline...

Claims

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Application Information

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IPC IPC(8): C10G7/02
Inventor 张金永董凌云郝兴仁高步良王伟
Owner SINOPEC QILU CO
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