Method for preparing ethyl alcohol and isopropyl alcohol

A technology of isopropanol and ethanol, which is applied in the field of catalysis, can solve the problems of high cost of use and difficulty in industrial application, and achieve the effects of low cost, mild reaction conditions and simple process flow

Inactive Publication Date: 2014-08-13
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although noble metal (such as ruthenium, rhodium, platinum) catalysts have the characteristics of high activity, etc., the cost of use is high and it is difficult to apply industrially

Method used

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  • Method for preparing ethyl alcohol and isopropyl alcohol
  • Method for preparing ethyl alcohol and isopropyl alcohol
  • Method for preparing ethyl alcohol and isopropyl alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Copper oxide-based catalysts were prepared by co-precipitation method. The copper oxide-based catalyst includes copper oxide, a promoter and a carrier, wherein the promoter includes one of zinc oxide, chromium oxide, nickel oxide, cobalt oxide, samarium oxide, neodymium oxide, etc. One or more mixtures, the carrier is one or more than two of alumina, cerium oxide, zirconia, titanium oxide, molecular sieve, etc. mixed.

[0026] The weight percentage of each component in the copper oxide-based catalyst is as follows: copper oxide accounts for 3wt%-50wt%, co-catalyst accounts for 3wt%-50wt%, and carrier accounts for no more than 95wt%. The more optimal composition range of the catalyst is that the copper oxide accounts for 25wt%-35wt%, the co-catalyst accounts for 10wt%-20wt%, and the carrier accounts for 20wt%-40wt%. Example 2

Embodiment 2

[0027] Take by weighing 18.7 grams of copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) and 23.0 grams of zinc nitrate (Zn(NO 3 ) 2 ·6H 2 0) be placed in a beaker, be mixed with the metal salt solution of 1.5mol / L with pure water dissolving; The solution was slowly added dropwise into the precipitation reactor, the pH value of the precipitation was controlled between 7 and 8, the precipitation temperature was 60°C, and the precipitation was left to stand for 24 hours. Suction filter, wash, and dry the precipitate at 90°C for 12 hours at a constant temperature. After granulation, it is calcined in a muffle furnace at 400°C to obtain the final catalyst after a certain period of time.

[0028] Get above-mentioned catalyzer 5.0 grams and place in fixed-bed reactor and reduce, reduce in volume ratio 35%H 2 / N 2 Reduction in air flow, reduction temperature 300°C, normal pressure, space velocity 500h -1 , The reduction time is 8 hours. After the reduction, replace the whole system with p...

Embodiment 3

[0030] Weigh 9.2 grams of copper nitrate (Cu(NO 3 ) 2 ·3H 2 O), 17.0 grams of zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O) and 27.4 grams of aluminum nitrate (Al(NO 3 ) 3 9H 2 O) be placed in a beaker, dissolved with pure water to prepare a 1.0mol / L metal salt solution; take a certain amount of sodium hydroxide and place it in a beaker, and prepare a 1.0mol / L solution, and mix the metal salt solution with hydrogen The sodium oxide solution was slowly added dropwise into the precipitation reactor, the pH value of the precipitation was controlled between 7 and 8, the precipitation temperature was 60°C, and the precipitation was left to stand for 12 hours. The precipitate was suction filtered, washed, and dried at a temperature of 90° C. and kept at a constant temperature for 12 hours. Then place it in a muffle furnace for calcination at 400°C, and obtain the final catalyst after a certain period of time.

[0031] Get above-mentioned catalyzer 5.0 grams and place in fixed-bed reac...

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Abstract

The invention relates to a method for preparing ethyl alcohol and isopropyl alcohol and belongs to the technical field of catalysis. According to the method, a copper oxide catalyst is placed in a reactor and a H2 / N2 gas mixture is used as a reducing gas, wherein volume of hydrogen accounts for 20-35% of the volume of the gas mixture, reduction temperature is 150-500 DEG C, reduction pressure is no greater than 1.0 MPa, gas hourly space velocity is 300-2000 h<-1>, and reduction time is 2-10 h; after reduction, the reactor is filled with hydrogen, reaction temperature is adjusted to 150-300 DEG C, and pressure is 4.0-10.0 MPa; and acetic acid isopropyl ester is blown into the reactor, liquid space velocity is 0.1-1.0 h<-1>, and a hydrogenolysis reaction between acetic acid isopropyl ester and hydrogen is carried out to generate ethyl alcohol and isopropyl alcohol. The catalyst provided by the invention has a high activity, and conversion rate can reach the highest level. Meanwhile, the preparation method is simple; cost is low; and the catalyst has stable performance.

Description

technical field [0001] The invention relates to a method for preparing ethanol and isopropanol, belonging to the technical field of catalysis. Background technique [0002] Isopropanol is an important organic chemical raw material, which has a wide range of uses in the fields of pesticides, medicine, electronics, daily chemicals, and gasoline additives. Although the production of isopropanol in my country has increased year after year, it still cannot meet the domestic demand, so a large amount of isopropanol is imported every year. [0003] At present, the industrial production method of isopropanol at home and abroad is mainly propylene hydration method, and its process route can be divided into propylene indirect hydration method and propylene direct hydration method. U.S. Patent US3352930 uses propylene indirect hydration method to prepare isopropanol, dilutes sulfuric acid with water to 70%-80%, and under the conditions of reaction temperature 70-80°C and reaction pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/149C07C31/08C07C31/10
CPCC07C29/149C07C31/08C07C31/10
Inventor 孟庆伟李亚楠都健刘德治周庆伟
Owner DALIAN UNIV OF TECH
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