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Method for preparing ethylene by ethanol dehydration

A technology for ethanol dehydration and ethylene, applied in chemical instruments and methods, hydrocarbon production from oxygen-containing organic compounds, molecular sieve catalysts, etc., can solve the problems of poor reaction stability, etc., and achieve the suppression of carbon deposition, smooth channels, and good The effect of technical effects

Inactive Publication Date: 2013-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The technical problem to be solved by the present invention is that there is a problem of poor reaction stability in the prior art, and a new method for preparing ethylene by dehydration of ethanol is provided

Method used

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  • Method for preparing ethylene by ethanol dehydration
  • Method for preparing ethylene by ethanol dehydration

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Effect test

Embodiment 1

[0022] Weigh 7.4 grams of silica sol (SiO 2 40% by weight), then add sodium metaaluminate, 40% aqueous sodium hydroxide solution, so that the molar ratio is: 6 Na 2 O:Al 2 o 3 : 80 SiO 2 , and add water to mix, knead and extrude. After that, it was dried at 100° C. for 1 hour, and then pelletized. A mixture of 2 grams of tetrapropylammonium bromide and 10 grams of distilled water was added in advance in the reaction kettle, a stainless steel mesh was placed above the mixture, the formed molecular sieve was placed on the stainless steel mesh, and the reaction kettle was sealed. The reactor was subjected to gas-solid phase treatment at 150°C for 4 days. After the product was taken out, it was washed with water, dried at 120°C for 10 hours, and then baked at 550°C for 5 hours to remove the template agent. For the XRD characterization results of the sample, see figure 1 . Afterwards, the obtained material was exchanged three times with 10% by weight ammonium nitrate aqueous...

Embodiment 2

[0025]Weigh 7.4 grams of silica sol (SiO 2 Weight content 40%), add sodium metaaluminate, 40% sodium hydroxide aqueous solution again, make mol ratio be: 8 Na 2 O:Al 2 o 3 : 100 SiO 2 , and add water to mix, knead and extrude. Thereafter, it was dried at 120° C. for 1 hour, and then pelletized. Add a mixture of 2 grams of tetrapropylammonium hydroxide and 10 grams of distilled water in advance in the reaction kettle, place a stainless steel mesh above the mixture, place the formed molecular sieve on the stainless steel mesh, and seal the reaction kettle. The reactor was subjected to gas-solid phase treatment at 170°C for 3 days. After the product was taken out, it was washed with water, dried at 120°C for 10 hours, and then baked at 550°C for 5 hours to remove the template. Afterwards, the obtained material was exchanged three times with 10% by weight ammonium nitrate aqueous solution at 80° C., washed twice with water, dried at 120° C. for 10 hours, and calcined at 550°...

Embodiment 3

[0028] Weigh 7.4 grams of silica sol (SiO 2 40% by weight), then add sodium metaaluminate, 40% aqueous sodium hydroxide solution, so that the molar ratio is: 3.5 Na 2 O:Al 2 o 3 : 60 SiO 2 , and add water to mix, knead and extrude. After that, it was dried at 120° C. for 2 hours and cut into pellets. A mixture of 6 g of ethylenediamine and 10 g of distilled water was preliminarily added to the reaction kettle, a stainless steel mesh was placed above the mixture, the formed molecular sieve was placed on the stainless steel mesh, and the reaction kettle was sealed. The reactor was subjected to gas-solid phase treatment at 180°C for 2 days. After the product was taken out, it was washed with water, dried at 120°C for 10 hours, and then baked at 550°C for 5 hours to remove the template. Afterwards, the obtained material was exchanged three times with 10% by weight ammonium nitrate aqueous solution at 80° C., washed twice with water, dried at 120° C. for 10 hours, and calcine...

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Abstract

The invention relates to a method for preparing ethylene by ethanol dehydration, which mainly solves the problem of poor reaction stability in the prior art. Aiming at well solving the problem, the method adopts the technical scheme that ethanol is used as a raw material, the concentration of the ethanol in percentage by weight is 5% to 100%, and the reaction raw material comes into contact with a catalyst to generate the ethylene when the reaction temperature is 200 to 400 DEG C and the volume hourly space velocity is 0.1 to 15 h<-1> relative to the ethanol. The catalyst is a non-binder ZSM-5 molecular sieve. The method can be used for the industrial production of the ethylene prepared by the ethanol dehydration.

Description

technical field [0001] The invention relates to a method for preparing ethylene by dehydration of ethanol. Background technique [0002] As a basic organic chemical raw material and a leading product in the petrochemical industry, ethylene is known as the "mother of petrochemical industry". It is mainly used in the production of polyethylene, ethylene oxide / ethylene glycol, dichloroethane, styrene, acetic acid Chemicals such as ethylene. With the rapid development of ethylene derivative industries such as chemical industry, energy and materials, the demand for ethylene is increasing. At present, ethylene mainly comes from naphtha cracking. As petroleum resources are non-renewable and are gradually becoming exhausted, the use of renewable biomass resources to develop bioenergy and biochemical industries has become an inevitable trend of current and future economic development. Ethanol can be obtained by fermentation of plant starch or wood fiber. The source of raw material...

Claims

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Application Information

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IPC IPC(8): C07C11/04C07C1/24B01J29/40
CPCY02P20/52
Inventor 李亚男徐菁李玉宁金照生杨为民
Owner CHINA PETROLEUM & CHEM CORP
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