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Synthetic method of high-purity methyl tertiary butyl ether (MTBE)

A technology of methyl tert-butyl ether and crude methyl tert-butyl ether, which is applied in the field of synthesis of high-purity methyl tert-butyl ether, can solve the problem of affecting the use of methyl tert-butyl ether, low production efficiency, and production costs Advanced problems, to achieve the effect of increasing the adsorption surface area, complete desulfurization, and increasing adsorption activity

Inactive Publication Date: 2018-08-24
陈久仓
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current production of methyl tert-butyl ether contains a lot of impurities and needs to go through multiple impurity removal processes, resulting in high production costs and low production efficiency, especially the high content of sulfides, which seriously affects the use of methyl tert-butyl ether

Method used

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  • Synthetic method of high-purity methyl tertiary butyl ether (MTBE)

Examples

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Effect test

Embodiment 1

[0033] A synthetic method of high-purity methyl tert-butyl ether, comprising the following steps:

[0034] (1) Mix the crude methyl tert-butyl ether and the sulfur collector evenly, stir and bake in a vacuum oven at 50°C for 1 hour;

[0035] (2) Send the mixed solution baked in step (1) into the distillation tower, control the temperature at the bottom of the tower to be 125°C, and the temperature at the top of the tower to be 140°C, and the collected sulfur-containing mixture flows out from the bottom of the tower, and the purified methyl Tert-butyl ether flows out from the top of the tower;

[0036] The sulfur collecting agent is composed of the following raw materials in parts by weight: 50 parts of ferrous oxalate, 26 parts of cobalt nitrate, 25 parts of potassium chloride, 13 parts of silver chloride, 8 parts of copper sulfate, 11 parts of silica gel, 30 parts of potassium permanganate 50 parts of cyclohexane, 40 parts of acetophenone, 4 parts of carbon nanotubes, and 55...

Embodiment 2

[0056] A synthetic method of high-purity methyl tert-butyl ether, comprising the following steps:

[0057] (1) Mix the crude methyl tert-butyl ether and the sulfur collector evenly, stir and bake in a vacuum oven at 55°C for 2 hours;

[0058] (2) Send the mixed solution baked in step (1) into the distillation tower, control the temperature at the bottom of the tower to be 85°C, and the temperature at the top of the tower to be 130°C, and the collected sulfur-containing mixture flows out from the bottom of the tower, and the purified methyl Tert-butyl ether flows out from the top of the tower;

[0059] The sulfur collecting agent is composed of the following raw materials in parts by weight: 40 parts of ferrous oxalate, 42 parts of cobalt nitrate, 24 parts of potassium chloride, 12 parts of silver chloride, 7 parts of copper sulfate, 10 parts of silica gel, 20 parts of potassium permanganate 60 parts of cyclohexane, 35 parts of acetophenone, 3 parts of carbon nanotubes, and 45...

Embodiment 3

[0079] A synthetic method of high-purity methyl tert-butyl ether, comprising the following steps:

[0080] (1) Mix the crude methyl tert-butyl ether and the sulfur collector evenly, stir and bake in a vacuum oven at 60°C for 1 hour;

[0081] (2) Send the mixed solution baked in step (1) into the distillation tower, control the temperature at the bottom of the tower to be 105°C, and the temperature at the top of the tower to be 150°C, and the collected sulfur-containing mixture flows out from the bottom of the tower, and the purified methyl Tert-butyl ether flows out from the top of the tower;

[0082] The sulfur collecting agent is composed of the following raw materials in parts by weight: 30 parts of ferrous oxalate, 34 parts of cobalt nitrate, 23 parts of potassium chloride, 14 parts of silver chloride, 6 parts of copper sulfate, 12 parts of silica gel, 25 parts of potassium permanganate 70 parts of cyclohexane, 30 parts of acetophenone, 5 parts of carbon nanotubes, and 35...

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Abstract

The invention discloses a synthetic method of high-purity methyl tertiary butyl ether (MTBE) and relates to the field of synthesis of chemical raw materials. The synthetic method of the high-purity methyl tertiary butyl ether, disclosed by the invention, comprises the following steps: isobutylene and methanol are used as raw materials, catalytic reaction is performed with a catalyst to obtain crude methyl tertiary butyl ether (MTBE), and the MTBE and a sulfur collector are uniformly mixed and are stirred and baked in a vacuum drying oven; and baked mixed liquid is fed into a distillation column, a collected sulfur-containing mixture flows out from the bottom of the column, and the purified methyl tertiary butyl ether (MTBE) flows out from the top of the column. Impurity sulfur is absorbedand removed with the sulfur collector. the process is simple and controllable, and the impurity removal effect is good; in the sulfur collector, part of ferrous oxalate can be oxidized to ferric oxalate by potassium permanganate; after a carbon nano tube is sintered in a protective atmosphere furnace and treated by a reaction kettle, an uneven shape can be generated on the surface, and cracks canbe formed in part of areas, so that the adsorption activity and the adsorption specific surface area of the carbon nano tube are increased; and by cooperative use of silver chloride, cobalt nitrate and silica gel, the desulfurization can be more thorough.

Description

Technical field: [0001] The invention relates to the field of chemical raw material synthesis, in particular to a method for synthesizing high-purity methyl tert-butyl ether. Background technique: [0002] Methyl tert-butyl ether (MTBE) is a gasoline additive with a high octane number (research octane number 115). It is good for starting, and it is often used in the blending of unleaded gasoline and low lead oil. MTBE can also be re-cracked into isobutylene as a raw material for rubber and other chemical products. The best quality methyl tert-butyl ether can be used as medicine and is a medicine intermediate. [0003] As an octane number improver for gasoline, MTBE can not only increase the oxygen content of gasoline, but also promote clean combustion and reduce harmful emissions from vehicles. MTBE is soluble in water, and as a result, MTBE is increasingly being found in underground drinking water bodies in the United States, primarily due to leaks from underground and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/04C07C41/06C07C41/42B01J31/10
CPCB01J31/10C07C41/06C07C41/42C07C43/046
Inventor 陈久仓
Owner 陈久仓