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Method for preparing industrial ethanol from acetic acid

A technology for industrial ethanol and acetic acid, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of high catalyst cost, harsh reaction conditions, and low single-pass conversion rate, and achieve good technical effects, reaction The effect of mild conditions and low energy consumption

Inactive Publication Date: 2014-05-07
上海海源硅材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The technical problem to be solved by the present invention is that the existing acetic acid hydrogenation catalyst has harsh reaction conditions in the process of preparing ethanol, the problem of high energy consumption due to low conversion rate per pass, and the problem of high catalyst cost. The present invention provides a new method for preparing ethanol Methods

Method used

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  • Method for preparing industrial ethanol from acetic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 60.0g of 40% silica sol according to the proportion and heat it to 80°C in 1.0L medium water to form solution 1; weigh 121.5g of Cu(NO 3 ) 2 ·3H 2 O, 73.5g Zn(NO 3 ) 2 ·6H 2 O, 10.6g La(NO 3 ) 3 ·6H 2 O, 5.1g Ba(NO 3 ) 2 , 36.8g Al(NO 3 ) 3 9H 2 O, weight percentage is 50%Mn(NO 3 ) 2 Solution 8.2g was dissolved in 1.0L water together, heated and stirred in an 80°C oil bath to form solution 2. Weigh 106.0 g of anhydrous sodium carbonate into a beaker, add distilled water to 1 L, stir and dissolve to prepare a 1.0 mol / L sodium carbonate aqueous solution as solution 3. Solution 2 and solution 3 were added dropwise to solution 1 at the same time, and the pH was kept at about 7.0 to obtain a precipitate, which was filtered to obtain a precipitate. The precipitate was dried and calcined to obtain catalyst 1 (by weight percentage: 40%CuO-20%ZnO%-4%Lal 2 o 3 -5%Al 2 o 3 -3%BaO-4%MnO 2 -24%SiO2 2 )

[0031] Load 50g of the catalyst in the reactor, aft...

Embodiment 2

[0033] Weigh 78.0g of 40% silica sol and 46.7g of 15% aluminum sol in 1.0L medium water and heat to 80°C to form solution 1; weigh a certain amount of 91.13g of Cu(NO 3 ) 2 ·3H 2 O, 73.50g Zn(NO 3 ) 2 ·6H 2 O, 19.4g Co(NO 3 ) 2 ·6H 2 O, 8.54gBa(NO 3 ) 2 , the weight percentage is 50%Mn(NO 3 ) 2 14.4 g of the solution was dissolved in 1.0 L of water, and heated and stirred in an oil bath at 80° C. to form solution 2. Weigh 106 g of anhydrous sodium carbonate into a beaker, add distilled water to 1 L, stir and dissolve to prepare a 1.0 mol / L sodium carbonate aqueous solution as solution 3. Solution 2 and solution 3 were added dropwise to solution 1 at the same time, and the pH was kept at about 7.5 to obtain a precipitate, which was filtered to obtain a precipitate. The precipitate was dried and calcined to obtain catalyst 2 (by weight percentage: 30%CuO-20%ZnO%-5%CoO-7%Al 2 o 3 -5%BaO-7%MnO 2 -31%SiO2 2 )

[0034] Load 50g of the catalyst into the reactor, afte...

Embodiment 3

[0036] Weigh 100g of 40% silica sol and 100g of 15% aluminum sol in 1.3L medium water and heat to 75°C to form solution 1; weigh 75.94g of Cu(NO 3 ) 2 ·3H 2 O, 91.84g Zn(NO 3 ) 2 ·6H 2 O, 19.4g Co(NO 3 ) 2 ·6H 2 O, 2.52gCe(NO 3 ) 2 ·6H 2 O, Ba(NO 3 ) 2 , the weight percentage is 50%Mn(NO 3 ) 2 Solution 14.4g was dissolved in 1.0L water, heated and stirred in an oil bath at 75°C to form solution 2. Weigh 106 g of anhydrous sodium carbonate into a beaker, add distilled water to 1 L, stir and dissolve to prepare a 1.0 mol / L sodium carbonate aqueous solution as solution 3. Solution 2 and solution 3 were added dropwise to solution 1 at the same time, and the pH was kept at about 6.5 to obtain a precipitate, which was filtered to obtain a precipitate. The precipitate was dried and calcined to obtain catalyst 3 (by weight percentage: 25%CuO-25%ZnO%-5%CoO-1%CeO 2 -15%Al 2 o 3 -5%BaO-7%MnO 2 -17%SiO2 2 )

[0037] Load 50g of the catalyst into the reactor, after hyd...

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Abstract

The invention relates to a method for preparing ethanol, and particularly relates to a method for preparing ethanol from acetic acid. The method adopts raw materials and a catalyst, wherein the raw materials are acetic acid and hydrogen. The method is characterized in that the catalyst is a Cu-based catalyst, and the method comprises the steps of loading the Cu-based catalyst into a reactor, and reducing with hydrogen at 220-270 DEG C; feeding the hydrogen and acetic acid at a molar ratio of (10-50):1 to enable contact between the raw materials and the catalyst; reacting for 24 hours at a reaction temperature of 180-300 DEG C under a reaction pressure of 0.5-6.0MPa; reacting to generate ethanol and water when the mass air speed of the acetic acid is 0.1-0.5 / h; separating the product to obtain an ethanol product. The adopted Cu-based catalyst effectively adjusts the acid-base property of the catalyst, can inhibit the generation of diethyl ether, and converts acetic acid into ethanol to the greatest degree, thus the selectivity and stability are good, and the per-pass conversion of the reaction is high; meanwhile, the reaction conditions are mild, the energy consumption is low, and a good technical effect is obtained.

Description

[technical field] [0001] The invention relates to a method for preparing ethanol, in particular to a method for preparing industrial ethanol from acetic acid. [Background technique] [0002] Ethanol is widely used in food, medicine, chemical industry, fuel, national defense and other industries. As a very important component of clean fuel and gasoline anti-knock agent, it can greatly reduce the emission of pollutants from combustion. According to the global ethanol production annual forecast report jointly released by the Global Renewable Fuels Alliance and F.O.Licht, the global ethanol production in 2011 was about 88.7 billion liters (85.8 billion liters in 2010), an increase of more than 3%, and 60% of ethanol was used for automobile fuel . The United States is currently the largest country in the production of fuel ethanol. In 2006, the ethanol production in the United States was 19.472 billion liters. In 2007, the ethanol production capacity reached 25.388 billion liter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/08C07C29/149B01J23/889
CPCC07C29/149B01J23/002B01J23/8892B01J2523/00
Inventor 王立卓
Owner 上海海源硅材料科技有限公司
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