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Method for deeply desulfurizing methyl tertiary butyl ether

A technology of methyl tert-butyl ether and sulfur methyl tert-butyl ether, which is applied in the field of deep desulfurization of sulfur-containing methyl tert-butyl ether, can solve the problems of increased energy consumption and difficulty in stable production

Active Publication Date: 2012-07-11
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are two ways to solve the problem of exceeding the standard of total sulfur in methyl tert-butyl ether: (1) Improve the desulfurization efficiency of the liquefied petroleum gas refining unit through technological transformation. For catalytic cracking liquefied petroleum gas, the refined liquefied petroleum The total sulfur in the gas is reduced to 20μg·g -1 Below, but it is also difficult to stably produce total sulfur less than 50μg·g -1 The following methyl tert-butyl ether, but it is almost impossible to reduce the total sulfur of the refined liquefied petroleum gas to 20 μg·g through technical transformation for the total sulfur of the delayed coking liquefied petroleum gas -1 Below; (2) The refined liquefied petroleum gas adds a de-C in the gas separation device 5 Tower, so that heavy sulfides such as dimethyl disulfide are de-C 5 tower removed so that C 4 The sulfur content of the components is reduced to 20μg·g -1 Below, it is possible to produce a total sulfur of less than 50μg·g -1 The following methyl tert-butyl ether, but the energy consumption increases more

Method used

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  • Method for deeply desulfurizing methyl tertiary butyl ether
  • Method for deeply desulfurizing methyl tertiary butyl ether

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Test in 500ml small-scale rectification device, raw material: 95wt% methyl tert-butyl ether (sulfur content 864 μ g·g -1 ) and 5wt% reformed gasoline (sulfur content 0μg·g -1 ), the operating conditions of the rectifying tower are: the pressure at the bottom of the tower is 0.025MPa, the pressure at the top of the tower is 0.02MPa, the temperature at the bottom of the tower is 72°C, the temperature at the top of the tower is 55°C, the number of theoretical plates is 8, and the reflux ratio is 2. The total sulfur content of methyl tert-butyl ether sulfur after rectification is 2 μg·g -1 .

Embodiment 2

[0027] Test in 500ml small-scale rectification device, raw material: 95wt% methyl tert-butyl ether (sulfur content 864 μ g·g -1 ) and 5wt% reformed gasoline (sulfur content 0μg·g -1 ), the operating conditions of the rectifying tower are: the pressure at the bottom of the tower is 0.025MPa, the pressure at the top of the tower is 0.02MPa, the temperature at the bottom of the tower is 72°C, the temperature at the top is 55°C, the number of theoretical plates is 8, and the reflux ratio is 0.5. The total sulfur content of methyl tert-butyl ether sulfur after rectification is 9μg·g -1 .

Embodiment 3

[0029] Test in 500ml small-scale rectification device, raw material: 97wt% methyl tert-butyl ether (sulfur content 864 μ g·g -1 ) and 3wt% straight-run gasoline after hydrodesulfurization at 60°C to 90°C (sulfur content 2μg·g -1 ), the operating conditions of the rectifying tower are: the pressure at the bottom of the tower is 0.025MPa, the pressure at the top of the tower is 0.02MPa, the temperature at the bottom of the tower is 72°C, the temperature at the top is 54°C, the number of theoretical plates is 8, and the reflux ratio is 2. The total sulfur content of methyl tert-butyl ether sulfur after rectification is 3 μg·g -1 .

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Abstract

The invention provides a method for deeply desulfurizing methyl tertiary butyl ether. The method is characterized in that the sulfur-containing methyl tertiary butyl ether is mixed with light oil to form a mixture; the mixture enters a distillation column for distillation, so as to remove sulfur compounds in the sulfur-containing methyl tertiary butyl ether; and the column reactor temperature of the distillation column is 70 DEG C to 120 DEG C, the column top temperature is 50 DEG C to 60 DEG C, the pressure is 0.01 MPa to 0.15 MPa, the theoretical column plate number is 3 to 20 and the reflux ratio is 0.25 to 10. By adopting the method, the total sulfur content of the methyl tertiary butyl ether can be reduced from more than 1000 Mug*g-1 to less than 1000 Mug*g-1, and the distilled methyl tertiary butyl ether can well satisfy the requirement of mixing automotive gasoline of a production country IV or a production country V.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and in particular relates to a method for deep desulfurization of sulfur-containing methyl tert-butyl ether. Background technique [0002] Methyl tert-butyl ether is an important blending component for the production of high-octane motor gasoline. It is produced through the etherification reaction of isobutylene and methanol in liquefied petroleum gas (LPG). Methyl tert-butyl ether (MTBE) Boiling point > 55°C. Because the total sulfur of refined liquefied petroleum gas exceeds the standard, especially the total sulfur of liquefied petroleum gas mixed with catalytic cracking and delayed coking is sometimes as high as several hundred μg·g -1 After refining, the etherification reaction of isobutene and methanol in the liquefied petroleum gas will concentrate the sulfur in the liquefied petroleum gas into methyl tert-butyl ether, making the total sulfur content in methyl tert-butyl ether as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/04C07C41/42
Inventor 柯明于沛宋昭峥蒋庆哲陈萌
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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