Method for removing sulfide in methyl tert butyl ether by catalytic distillation

A technology of catalytic distillation of methyl tert-butyl ether, applied in ether preparation, chemical industry, organic chemistry, etc., can solve the problem of loss of methyl tert-butyl ether, etc., achieve simple process, good separation effect and high yield Effect

Inactive Publication Date: 2012-10-17
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, alkali washing processes such as diethanolamine are mainly used to remove sulfide in liquefied petroleum gas. However, due to the development trend of heavy and inferior crude oil, the sulfide molecules in liquefied petroleum gas increase, and it is difficult to achieve the removal of sulfide by existing technologies. Among them, the removal of sulfides meets the standard requirements; the removal of sulfides from gasoline, diesel and other hydrocarbon raw materials is generally carried out by hydrotreating technology, but methyl tert-butyl ether is an oxygen-containing compound, because the carbon-sulfur bond energy is much higher Due to the carbon-oxygen bond energy, in the hydrodesulfurization process, the carbon-oxygen bond in methyl tert-butyl ether is first hydrodeoxygenated to generate corresponding alkanes, resulting in a large amount of methyl tert-butyl ether loss

Method used

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Examples

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Example Embodiment

[0020] Example 1

[0021] Catalytic distillation desulfurization tower reactor with a diameter of 30 mm, a height of 500 mm, and a number of plates of 25, equipped with Raschig ring ceramic packing, filled with a height of 100 mm, 25% hydrogen peroxide, methyl tert-butyl The base ether is fed from the bottom of the tower through a metering pump in the gas phase at a rate of 80g / h, and the formic acid is fed from the top of the tower through a metering pump through a metering pump in countercurrent contact with methyl tert-butyl ether and oxidized by hydrogen peroxide. Function: Oxidize organic sulfide in methyl tertiary butyl ether to water-soluble sulfate. The bottom temperature of the tower is 90℃, the temperature of the oxidation reaction section is 80℃, the top temperature is 60℃, and the top reflux ratio is 1; after oxidation Water-soluble sulfates are formed and dissolved in the water reduced with hydrogen peroxide, and left at the bottom of the tower; the methyl tert-but

Example Embodiment

[0022] Example 2

[0023] Catalytic distillation desulfurization tower reactor with a diameter of 30 mm, a height of 500 mm, and a number of plates of 25, equipped with ceramic Raschig ring packing, filled with 25% hydrogen peroxide and methyl tert-butyl with a height of 125 mm The base ether is fed from the bottom of the tower through a metering pump in the gas phase at a speed of 60g / h, and the formic acid is fed from the top of the tower through a metering pump at a rate of 2.0g / h. The liquid phase feed is in countercurrent contact with methyl tert-butyl ether and is oxidized by hydrogen peroxide. Function: Oxidize organic sulfide in methyl tertiary butyl ether to water-soluble sulfate. The bottom temperature of the tower is 80℃, the temperature of the oxidation reaction section is 75℃, the top temperature is 60℃, and the top reflux ratio is 2; after oxidation Water-soluble sulfates are formed and dissolved in the water reduced with hydrogen peroxide, and left at the botto

Example Embodiment

[0024] Example 3

[0025] Catalytic distillation desulfurization tower reactor with a diameter of 30 mm, a height of 500 mm, and a number of trays of 15 pieces, equipped with ceramic Raschig ring packing, filled with 5% hydrogen peroxide and methyl tert-butyl with a height of 150 mm Base ether is fed from the bottom of the tower through a metering pump in the gas phase at a speed of 20g / h, and formic acid is fed from the top of the tower through a metering pump at a rate of 2.0g / h. The liquid phase feed is in countercurrent contact with methyl tert-butyl ether and oxidized by hydrogen peroxide. Function: Oxidize the organic sulfide in methyl tert-butyl ether to water-soluble sulfate. The temperature at the bottom of the tower is 80°C, the temperature of the oxidation reaction section is 75°C, the temperature at the top of the tower is 65°C, and the reflux ratio at the top of the tower is 1; after oxidation Water-soluble sulfates are formed and dissolved in the water reduced wi

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Abstract

The invention relates to a method for removing sulfide in methyl tert butyl ether by catalytic distillation and is characterized in that a catalytic distillation desulfurization tower reactor is adopted; Raschig ring ceramic, glass bead filler and hydrogen peroxide are used as oxidizing agents; and formic acid, acetate, sulfuric acid or phosphoric acid is used as a catalyst. The method comprises the following steps of: feeding methyl tert butyl ether in a gas phase from the bottom of the tower, feeding the catalyst in a liquid phase from the top of the tower, performing countercurrent contact between the catalyst and methyl tert butyl ether, oxidizing organic sulfur compounds in methyl tert butyl ether to water-soluble sulfate under the action of the oxidizing agents, dissolving water-soluble sulfate formed after oxidation in water reduced by hydrogen peroxide, leaving at the bottom of the tower, and carrying out rectification separation on sulfide-removed methyl tert butyl ether and a small amount of water at a rectifying section of the catalytic tower, so as to obtain high-purity methyl tert butyl ether product with low sulfur content at the top of the tower. The method provided by the invention has advantages of high desulphurization efficiency, simple flow, less investment and no addition of a methyl tert butyl ether washing device.

Description

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Claims

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Application Information

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Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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