Catalyst for producing ethyl alcohol through C2 acid ester hydrogenation, and preparation and application of catalyst

A catalyst and ethanol production technology, which is applied in the direction of catalyst activation/preparation, hydroxyl compound preparation, metal/metal oxide/metal hydroxide catalyst, etc., which can solve the problems of high energy consumption

Inactive Publication Date: 2019-10-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] From the above reaction, it can be seen that the Cu-based catalyst is an effective catalyst to catalyze the hydrogenation reaction

Method used

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  • Catalyst for producing ethyl alcohol through C2 acid ester hydrogenation, and preparation and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 0.50g Cu(NO 3 ) 2 ·6H 2 O and 0.56g Co(OAC) 2 ·6H 2 O was dissolved in 100mL deionized water, and then 5.0g mass fraction of 40wt% SiO 2 Sol, adjust the pH value to 11 with ammonia water with a mass fraction of 25%, distill ammonia in a water bath at 80°C for 5 hours, filter, wash, dry, and then calcinate in a muffle furnace at 450°C for 4 hours to obtain 7.6Cu-7.8Co / SiO 2 (where the numbers before the metal represent M 1 Oxide and M 2 The mass percent content of oxide in the catalyst is the same as in the following examples).

[0022] The conditions for the catalytic hydrogenation reaction of dimethyl oxalate are: fixed bed continuous reaction, the reaction raw material is a methanol solution of dimethyl oxalate with a mass concentration of 20%, the hydrogen pressure is 2.5MPa, the reaction temperature is 200°C, and the liquid space velocity is 0.5h -1 , the hydrogen / dimethyl oxalate molar ratio is 200, under the reaction conditions and 7.6Cu-7.8Co / SiO 2 Under ...

Embodiment 2

[0024] 0.86gCu(NO 3 ) 2 ·6H 2 O and 0.16gCo(OAC) 2 ·6H 2 O was dissolved in 100mL deionized water, and then 5.0g mass fraction of 40wt% SiO 2 Sol, adjust the pH value to 11 with ammonia water with a mass fraction of 25%, distill ammonia in a water bath at 80°C for 5 hours, filter, wash, dry, and then calcinate in a muffle furnace at 450°C for 4 hours to obtain 12.1Cu-2.6Co / SiO 2 .

[0025] The conditions for the catalytic hydrogenation reaction of dimethyl oxalate are: fixed bed continuous reaction, the reaction raw material is a methanol solution of dimethyl oxalate with a mass concentration of 20%, the hydrogen pressure is 2.5MPa, the reaction temperature is 200°C, and the liquid space velocity is 0.5h -1 , the hydrogen / dimethyl oxalate molar ratio is 200, under the reaction conditions and 12.1Cu-2.6Co / SiO 2 Under the action of the ethanol yield can reach 97%.

Embodiment 3

[0027] 0.17gCu(NO 3 ) 2 ·6H 2 O and 0.93gCo(OAC) 2 ·6H 2 O was dissolved in 100mL deionized water, and then 5.0g mass fraction of 40wt% SiO 2 Sol, adjust the pH value to 11 with ammonia water with a mass fraction of 25%, distill ammonia in a water bath at 80°C for 5 hours, filter, wash, dry, and then calcinate in a muffle furnace at 450°C for 4 hours to obtain 2.4Cu-13.0Co / SiO 2 .

[0028] The conditions for the catalytic hydrogenation reaction of dimethyl oxalate are: fixed bed continuous reaction, the reaction raw material is a methanol solution of dimethyl oxalate with a mass concentration of 20%, the hydrogen pressure is 2.5MPa, the reaction temperature is 200°C, and the liquid space velocity is 0.5h -1 , the hydrogen / dimethyl oxalate molar ratio is 200, under the reaction conditions and 2.4Cu-13.0 / SiO 2 Under the action of the ethanol yield can reach 95%.

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Abstract

The invention relates to a bimetallic (non-precious metal) catalyst for producing ethyl alcohol through C2 acid ester hydrogenation, and a preparation method and application of the bimetallic (non-precious metal) catalyst. The catalyst is prepared from M1-M2/SiO2, wherein M1 and M2 are one of non-precious metal Cu, Co and Ni oxides, the molar ratio of M1 to M2 is (40:1) to (1:40), and the M1-M2/SiO2 is prepared through a co-ammonia still method. The catalyst can highly selectively convert C2 acid ester into the ethyl alcohol under the reaction conditions that the temperature is 150-250 DEG C,the hydrogen pressure is 1-5 MPa, the liquid air speed is 0.1-0.8 h<-1>, and the molar ratio of hydrogen to the C2 acid ester is 100-300.

Description

technical field [0001] This patent relates to a catalyst for hydrogenation of C2 ester to produce ethanol and its preparation method and application. [0002] technical background [0003] Fuel ethanol generally refers to anhydrous ethanol with a volume concentration above 99.5%. It is not only an excellent fuel, but also an excellent fuel quality improver. Mixing it with gasoline in a certain proportion can form a new generation of clean and environmentally friendly vehicle fuel, which can reduce the emission of pollutants such as carbon monoxide and hydrocarbons in vehicle exhaust. my country's fuel ethanol industry started relatively late, but with the vigorous development of the fuel ethanol industry in recent years, my country's ethanol production has shown an upward trend. As of 2015, my country's ethanol production capacity has reached 11.329 million tons per year. It will reach about 40 million tons per year, and fuel ethanol consumption will account for 15% of all f...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J23/72B01J23/755B01J37/16C07C31/08C07C29/149
CPCB01J23/72B01J23/75B01J23/755B01J37/16C07C29/149C07C31/08
Inventor 王爱琴杨超军刘菲苗治理石佳佳张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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