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Method for producing ether by dehydrating alcohol

A technology for the dehydration of alcohol and the production of ether, which is applied in the direction of dehydration of hydroxyl-containing compounds to prepare ether, chemical instruments and methods, and ether preparation. The effect of distillation range and low investment

Active Publication Date: 2014-01-22
KAIRUI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In the above inventions, some of the methanol dehydration reaction and product separation are completely completed in a catalytic distillation tower, which requires a large number of trays and high equipment investment. At the same time, the operation of the catalytic distillation tower needs to take into account both the optimization of reaction conditions and the product dimethyl ether. Requirements for purity and methanol content in wastewater, less flexibility in operation

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  • Method for producing ether by dehydrating alcohol
  • Method for producing ether by dehydrating alcohol
  • Method for producing ether by dehydrating alcohol

Examples

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Effect test

Embodiment 1

[0043] The method for methanol dehydration to produce dimethyl ether, concrete steps and parameters are as follows:

[0044] Such as image 3 As shown, the methanol preheated to 155°C directly enters the pre-reactor 1 for dehydration through the pipeline 15. After the conversion rate of methanol dehydration reaches 55.87%, the reaction materials directly enter the catalytic distillation tower 2 through the pipeline 6, and The methanol dehydration reaction is carried out under the action of the catalyst in the reaction section 4 of the catalytic distillation 2, and is separated on the surface of the catalyst packing. After multiple reactions and separations in the reaction section, it flows out of the reaction section 4, enters the stripping section 5, and in the stripping section 5 Under the action of the separation tray, the generated water flows to the bottom of the catalytic distillation tower, and flows out from the bottom of the tower through the pipeline 11. Part of it is...

Embodiment 2

[0066] The method for ethanol dehydration production ether, concrete steps and parameters are as follows:

[0067] Such as image 3 As shown, the ethanol preheated to 165°C directly enters the pre-reactor 1 for dehydration through the pipeline 15, and after the conversion rate of ethanol dehydration reaches 62.5%, the reaction material directly enters the catalytic distillation tower 2 through the pipeline 6, where The ethanol dehydration reaction is carried out under the action of the catalyst in the reaction section 4 of the catalytic distillation 2, and is separated on the surface of the catalyst packing. After multiple reactions and separations in the reaction section, it flows out of the reaction section 4, enters the stripping section 5, and in the stripping section 5 Under the action of the separation tray, the generated water flows to the bottom of the catalytic distillation tower, and flows out from the bottom of the tower through the pipeline 11. Part of it is vaporiz...

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Abstract

The invention provides a method for producing ether by dehydrating alcohol. After the alcohol is pre-reacted in a pre-reactor under the action of a catalyst and reaches the conversion rate of 50 to 90 percent, the alcohol enters a catalytic distillation tower and is continuously subjected to alcohol dehydration reaction and product separation is performed at the same time, the generated ether is discharged from the top of the catalytic distillation tower, and the generated water is discharged from a kettle of the catalytic distillation tower. By the method, the production process can be greatly simplified, the energy consumption is reduced, and the conversion rate of the alcohol is improved at the same time.

Description

technical field [0001] The invention relates to a production method of chemical products, in particular to a method for producing ether by dehydration of alcohol. Background technique [0002] Dimethyl ether is a widely used chemical product, which can be obtained by dehydration of methanol or one-step synthesis of synthesis gas. The methanol dehydration method was the first to use the sulfuric acid method for dehydration, and the reaction was carried out in the liquid phase. The main disadvantages were severe equipment corrosion, harsh operating conditions, and serious environmental pollution. In the current industrial production, the process of producing dimethyl ether by methanol dehydration using solid acid catalyst is the main production method and development trend. [0003] U.S. Patent No. 6,740,783 discloses a molecular sieve catalyst for producing dimethyl ether from methanol. Protons on the molecular sieve catalyst are replaced by metals or amines, and methanol va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C43/04C07C41/09B01D3/14B01J8/02B01J19/30
CPCY02P20/10
Inventor 张勇葛立军刘文飞毛进池
Owner KAIRUI ENVIRONMENTAL PROTECTION TECH