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Catalyst for preparing ethanol by hydrogenation of acetic ester, and preparation method and application thereof

A technology for hydrogenating acetate and producing ethanol, which is applied in chemical instruments and methods, hydroxyl compound preparation, metal/metal oxide/metal hydroxide catalysts, etc. Problems such as poor stability to achieve the effect of improving economy

Inactive Publication Date: 2014-02-19
YASHENTECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In short, so far, no matter whether it is to directly prepare ethanol from acetic acid or acetate hydrogenation, or start from CO and methanol, and then indirectly prepare ethanol through acetic acid or acetate hydrogenation, it is still in the research stage. At present, there are still problems such as equipment corrosion and raw material Problems such as low space velocity, high ratio of hydrogen ester, more by-products, poor catalyst stability and low process economy

Method used

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  • Catalyst for preparing ethanol by hydrogenation of acetic ester, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 48.32g Cu(NO 3 ) 2 .3H 2 O and 12.50g Al(NO 3 ) 3 .9H 2 O was dissolved in 500g deionized water to make mixed solution A; 21.41g sodium carbonate was dissolved in 650g deionized water to make alkaline solution B; the HSMXR system speed was adjusted to 6000rpm, and the reactor temperature was set to 70°C, and the mixed solution A and lye B are pumped into the HSMXR system at a speed of 1ml / min at the same time, and the outlet slurry is collected; then the slurry is aged in an oven at 70°C for 1.5 hours; the slurry is centrifuged and washed three times; the obtained sample is heated at 60°C After drying for 16 hours, bake at 350°C for 3 hours. Finally, the catalyst was compressed into tablets and sieved into 20-40 mesh samples, packed in a fixed-bed reactor, and reduced for 3 hours at 50 ml / min hydrogen at 250° C. to obtain the desired catalyst.

[0021] Using ethyl acetate as a raw material, at a reaction temperature of 210°C, a reaction pressure of 20 bar, a hydroge...

Embodiment 2

[0023] 50.74g Cu(NO 3 ) 2 .3H 2 O, 17.85g Zn(NO 3 ) 2 .6H 2 O and 9.64gAl(NO 3 ) 3 .9H 2 O was dissolved in 500g deionized water to make mixed solution A; 42.62g ammonium carbonate was dissolved in 700g deionized water to make alkaline solution B; when the HSMXR system rotated at 6000rpm and the temperature was 80°C, mixed solution A and alkali Liquid B was pumped into the HSMXR system at a speed of 1ml / min at the same time, and the outlet slurry was collected; then the slurry was aged in an oven at 80°C for 2 hours; the slurry was centrifuged and washed three times; the obtained sample was dried at 70°C for 12 Hours later, it was baked at 400° C. for 3 hours. Finally, the catalyst was compressed into tablets and sieved into 20-40 mesh samples, packed in a fixed-bed reactor, and reduced with 50 ml / min hydrogen at 250° C. for 3 hours to obtain the desired catalyst.

[0024] Using ethyl acetate as raw material, at a reaction temperature of 220°C, a reaction pressure of ...

Embodiment 3

[0026] 48.32g Cu(NO 3 ) 2 .3H 2 O, 6.41g Mg(NO 3 ) 2 .6H 2 O and 15.01gAl(NO 3 ) 3 .9H 2 O was dissolved in 700g deionized water to make mixed solution A; 22.90g sodium hydroxide was dissolved in 800g deionized water to make alkaline solution B; when the HSMXR system speed was 6000rpm and the temperature was 70°C, mixed solution A and The lye B is pumped into the HSMXR system at a speed of 2ml / min at the same time, and the outlet slurry is collected; then the slurry is aged at room temperature for 2 hours; the slurry is centrifuged and washed three times; the obtained sample is dried at 60°C for 16 hours After that, it is baked at 300° C. for 4 hours. Finally, the catalyst was compressed into tablets and sieved into 20-40 mesh samples, packed in a fixed-bed reactor, and reduced for 2 hours at 50 ml / min hydrogen at 260° C. to obtain the desired catalyst.

[0027] Using ethyl acetate as the raw material, the reaction temperature is 220°C, the reaction pressure is 23bar,...

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Abstract

The invention relates to a catalyst for preparing ethanol by hydrogenation of acetic ester, and a preparation method and an application thereof. The catalyst comprises two or more transition metals, IIIa-group metal oxide and alkaline earth oxide, and is a binary or more nano compound metal oxide formed by transition metal CuO and / or IIIa-group metal oxide Al2O3 and / or one or more of other transition metals and alkaline earth oxide. The catalyst is prepared by a special high shear mixed reactor system. The obtained catalyst is applied for reactions of preparing ethanol by hydrogenation of acetic ester. Under the conditions of high raw material liquid hourly space velocity (0.5-5 g / g.h<-1>) and low hydrogen ester ration (molar ratio being 5-60), selectivity for ethanol can reach 99%; and space time yield of ethanol can reach 4 g / g.h<-1>, so that economical efficiency of the process for preparing ethanol by hydrogenation of acetic ester is greatly increased.

Description

【Technical field】 [0001] The invention relates to a nanocomposite metal oxide catalyst applied to the hydrogenation reaction of acetate to produce ethanol and a preparation method thereof. 【Background technique】 [0002] Ethanol is an important bulk organic chemical product, which can be widely used in food, chemical, medical, dye and fuel fields. At present, the main consumption areas of ethanol in my country are liquor and fuel ethanol. my country stipulates that 10% ethanol can be added to gasoline to reduce the amount of gasoline and reduce environmental pollution. The current ethanol production method in our country mainly adopts the fermentation method, and about 96.5% of ethanol depends on the fermentation production of crops. This method has a low production capacity and greatly increases the consumption of food. The current industrialized method of chemically synthesizing ethanol is to use ethylene obtained from petroleum cracking as raw material and produce it by...

Claims

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Application Information

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IPC IPC(8): B01J23/72B01J23/80B01J23/745C07C31/08C07C29/149
Inventor 吴鹏李志坚王讯文
Owner YASHENTECH CORP
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