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Catalyst for preparation of ethanol through acetic acid hydrogenation and preparation method thereof

A catalyst, a technology for producing ethanol, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve problems such as reducing the yield of ethanol, and achieve the effects of promoting dispersion, reducing dosage, and good repeatability

Inactive Publication Date: 2013-01-02
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results showed that the addition of W promoted the esterification and etherification reactions and decreased the yield of ethanol

Method used

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  • Catalyst for preparation of ethanol through acetic acid hydrogenation and preparation method thereof
  • Catalyst for preparation of ethanol through acetic acid hydrogenation and preparation method thereof
  • Catalyst for preparation of ethanol through acetic acid hydrogenation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1%Pt-1.2%Sn / CNT catalyst:

[0027] 1) The purchased CNT crude product (diameter 10-60nm, length 1-15μm, specific surface area 40-300m 2 / g) 5.0g was refluxed with 100mL of concentrated nitric acid in an oil bath at 80°C for 10h, filtered, washed and dried. Weigh 1.0 g of the treated CNT, add it into 100 mL of ethylene glycol solution, and disperse it by ultrasonic for 1 h.

[0028] 2) Measure 6.6 mL of 1.5 mg / mL chloroplatinic acid-ethylene glycol solution and 1.5 mL of 8 mg / mL stannous chloride-ethylene glycol solution, and mix them uniformly to obtain solution A.

[0029] 3) Prepare 250 mL of 0.6 mg / mL sodium dodecyl sulfate (SDS)-ethylene glycol solution.

[0030] 4) Mix solution A and the SDS-ethylene glycol solution prepared in step 3) and the ultrasonically dispersed CNTs in step 1) at room temperature for 1 hour, then slowly add 0.5mol / L NaBH dropwise under continuous stirring 4 -EG solution 10mL, then stirred for 5h, vacuum filtered, washed with deionized water...

Embodiment 2

[0034] 1%Pt-2%Sn / CNT catalyst:

[0035] The preparation method of CNT-loaded Pt-Sn bimetallic catalyst is the same as embodiment 1, but the tin protochloride-ethylene glycol solution of 8mg / mL is 2.5mL, other composition is constant, makes 1%Pt-2%Sn / CNT catalyst, the performance evaluation and product analysis conditions of catalyst to the ethanol hydrogenation of acetic acid are the same as embodiment 1, and the results are shown in Table 1.

Embodiment 3

[0037] 1%Pt-2%Sn / SiC catalyst:

[0038] The preparation method of the silicon carbide-supported Pt-Sn bimetallic catalyst is the same as in Example 1, except that the carbon nanotubes are replaced by silicon carbide carriers, and the silicon carbide is not pre-treated. A 1%Pt-2%Sn / SiC catalyst was prepared. The performance evaluation and product analysis conditions of the catalyst for the hydrogenation of acetic acid to ethanol were the same as in Example 1. The results are shown in Table 1.

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Abstract

The invention relates to a catalyst for preparation of ethanol through acetic acid hydrogenation and a preparation method thereof, and provides a catalyst for preparation of ethanol through acetic acid hydrogenation, which is environment-friendly, mild in conditions, excellent in catalysis performance and high in stability, and a preparation method thereof. The catalyst comprises the following components in percentage by mass: 0.5-2% of platinum, 0.5-6% of tin and the balance of carrier; and the composition of the catalyst is expressed as x%Pt-y%Sn / carrier, wherein x% represents the mass percent of Pt in the catalyst, y% represents the mass percent of Sn in the catalyst, and the carrier is silicon carbide or carbon nanotube. The preparation method of the catalyst comprises the following steps: mixing surfactant sodium lauryl sulfate with the platinum and tin components; then adding the carrier; performing liquid-phase reduction to prepare a catalyst precursor; and roasting the catalyst precursor under the air atmosphere to obtain the supported platinum-tin bimetallic catalyst for acetic acid hydrogenation. The invention has the advantages of simple preparation process and good repetitiveness, and is easy to implement scale-up production.

Description

technical field [0001] The invention relates to a catalyst, especially a catalyst for hydrogenating acetic acid to produce ethanol and a preparation method thereof. Background technique [0002] Ethanol is an important organic solvent and one of the important basic chemical raw materials. It is widely used in organic synthesis, medicine, pesticide, chemical industry and other industries. Ethanol can also be used as a vehicle fuel and is a non-polluting, high-octane gasoline additive. At present, the industrial production methods of ethanol mainly include grain fermentation method and hydration method of ethylene on phosphoric acid-diatomite catalyst. In recent years, more and more attention has been paid to the method of producing ethanol from coal or natural gas, that is, the synthesis gas (CO+H 2 ), the synthesis gas can produce ethanol, acetaldehyde, ethyl acetate and acetic acid-based C2-oxygenates on the supported Rh-based catalyst at 6.0-8.0MPa, 300oC, and the above ...

Claims

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Application Information

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IPC IPC(8): B01J23/62B01J27/224C07C29/149C07C31/08
CPCY02P20/52
Inventor 袁友珠张素斌叶林敏张博吴文章吴飞明谢兆雄计扬
Owner XIAMEN UNIV
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