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Method for catalyzing and dehydrating ethanol

A technology for catalytic dehydration and aqueous ethanol solution, applied in chemical instruments and methods, physical/chemical process catalysts, organic chemistry, etc., can solve the problem of low catalyst activity

Inactive Publication Date: 2012-03-14
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 that there is a problem of low catalyst activity in the prior art, and a new method for ethanol catalytic dehydration is provided

Method used

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  • Method for catalyzing and dehydrating ethanol
  • Method for catalyzing and dehydrating ethanol
  • Method for catalyzing and dehydrating ethanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Get 7.8 grams of Thomme stone powder (Al 2 o 3 mass content 70%) in 100 milliliters of water, reflux at 80°C for 0.5 hour, dropwise add 7 milliliters of 1 mol / liter nitric acid solution for degumming, and continue stirring for 10 hours to obtain stable, highly dispersed 1 mol / liter boehmite Sol.

[0017] At 35°C, 10.92 grams of cetyltrimethylammonium bromide (C 16 NBr), 180 milliliters of 2 moles / liter of ammonia water were added to 120 milliliters of 1 moles / liter of boehmite sol, and after being completely dissolved, the mixture was stirred overnight, hydrothermally treated at 100° C. for 1 day, filtered, washed, dried, and roasted at 600° C. for 5 hours. A finished catalyst is obtained.

Embodiment 2～9

[0019] Others are cetyltrimethylammonium chloride (C 16 NCl), dodecyltrimethylammonium bromide (C 12 NBr), dodecyltrimethylammonium chloride (C 12 NCl)), polyethylene oxide-polypropylene oxide-polyethylene oxide (P123), polyethylene glycol 2000 (PEG2k), polyethylene glycol 6000 (PEG6k), polyethylene glycol 20000 (PEG2w) The preparation conditions of the template agent are according to the steps of [Example 1], and the specific material ratio and preparation conditions are shown in Table 1.

Embodiment 10

[0020] [Example 10] Catalytic Performance Evaluation

[0021] 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 360 ° C, and the normal pressure The following reaction, the raw material is 95% ethanol, and the space velocity is 1 hour -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 catalyzing and dehydrating ethanol, which mainly solves the problem of low catalyst activity in prior art. According to the invention, an ethanol aqueous solution with 5-100% of weight percentage concentration is taken as a raw material, under the condition that the reaction temperature is 250 DEG C-500 DEG C and the volume space velocity relative to ethanol is 0.1-25 hours<-1>, the reaction raw material is contacted with a catalyst to generate ethylene, wherein the employed catalyst is mesopore Al2O3 with 1-20 nanometers of pore diameter. The technical scheme better solves the problem and can be used in industrial production of ethylene through ethanol dehydration.

Description

technical field [0001] The invention relates to a method for 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 dehydration route to ethy...

Claims

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Application Information

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IPC IPC(8): C07C1/24C07C11/04B01J21/04
CPCY02P20/52
Inventor 徐菁李亚男金照生孙兰萍杨为民
Owner CHINA PETROLEUM & CHEM CORP
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