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Method for preparing ethene by catalyzing ethanol dehydration

A technology of catalytic dehydration and ethanol conversion rate, which is applied in the field of catalytic dehydration of ethanol to produce ethylene, and can solve the problems of low catalyst activity and the like

Active Publication Date: 2014-08-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the problem of low catalyst activity in the prior art, and a new method for producing ethylene by catalytic dehydration of ethanol is provided

Method used

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  • Method for preparing ethene by catalyzing ethanol dehydration
  • Method for preparing ethene by catalyzing ethanol dehydration
  • Method for preparing ethene by catalyzing ethanol dehydration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Get 11.5 grams of aluminum nitrate nonahydrate and dissolve it into 25 milliliters of water to obtain A solution, then get sodium dodecylsulfonate (C 12 ) 1.5 g was dissolved in 30 ml of water to obtain solution B, under stirring at 50°C, solution B was added dropwise to solution A, and stirred until a uniform gel-like product was obtained. Then 12 ml of 65-70% ethylamine aqueous solution was added dropwise to the above gel to obtain a precipitate. The precipitate was hydrothermally crystallized at 120°C for 4 days. The obtained solid product was washed with water until neutral, then washed four times with 95% ethanol, and dried in air at 50° C. to obtain surfactant-composite aluminum oxide nanotubes. Finally, it was calcined at 650° C. for 8 hours to obtain the finished catalyst.

Embodiment 2～9

[0025] The preparation conditions of other sulfonate-type anionic surfactants as templates are according to the steps of [Example 1]. The specific material ratio and preparation conditions are shown in Table 1.

Embodiment 10

[0026] [Example 10] Catalytic Performance Evaluation

[0027] The performance evaluation of the catalyst was carried out on a fixed-bed reaction device at normal pressure, using a stainless steel reactor with an inner diameter of 10 mm, the catalyst was the catalyst prepared in [Example 1], the loading capacity was 10 ml, the reaction temperature was 350 ° C, and the normal pressure Down reaction, raw material is 35% ethanol, space velocity 5 hours -1 . The reaction products were analyzed separately after gas-liquid separation, and the reaction results are shown in Table 2.

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Abstract

The invention relates to a method for preparing ethene by catalyzing ethanol dehydration, and mainly aims to solve the problem of low activity of catalysts in prior art. The method comprises the steps of: taking an ethanol aqueous solution with a weight percent concentration of 5-100% as the raw material, at a reaction temperature of 250-500DEG C, and under the condition of a volume space velocity of 0.1-25h<-1> relative to ethanol, contacting the reaction raw material with a catalyst so as to generate ethane, with an Al2O3 nanotube with a diameter of 3-12 nanometers as the catalyst. The technical method can well solve the above problem, and can be used for ethene preparation through ethanol dehydration.

Description

technical field [0001] The invention relates to a method for preparing ethylene by catalytic dehydration of ethanol. Background technique [0002] Ethylene, formula C 2 h 4 , is a very important petrochemical raw material. The dehydration of ethanol to ethylene was once a widely used route to obtain ethylene. It has a history of more than 200 years and was the main ethylene production route in the 19th century. Due to the vigorous development of petrochemical industry in the 20th century, cracking to ethylene is more economical, and this route is gradually eliminated. However, in some occasions, such as a wide range of ethanol sources and a small amount of ethylene consumption, ethanol dehydration is still used. [0003] With the massive use of petroleum resources and the danger of being depleted more and more, the price of petroleum is rising day by day, and the competitive advantage of the cracking method to produce ethylene is getting smaller and smaller. Ethanol deh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/04C07C1/24
Inventor 金照生李亚男徐菁黄祖娟
Owner CHINA PETROLEUM & CHEM CORP
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