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Catalytic agent for preparing ethanol by using acetic acid hydrogenation and preparation method thereof

A catalyst and ethanol production technology, which is applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve problems such as restricting industrial applications, and achieve the effects of inhibiting corrosion, small activity changes, and inhibiting catalyst deactivation

Active Publication Date: 2015-05-13
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even the PtSn / SiO with the best catalytic performance 2 Catalyst, its service life is only 100h, which also inevitably limits the possibility of its industrial application

Method used

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  • Catalytic agent for preparing ethanol by using acetic acid hydrogenation and preparation method thereof
  • Catalytic agent for preparing ethanol by using acetic acid hydrogenation and preparation method thereof
  • Catalytic agent for preparing ethanol by using acetic acid hydrogenation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 2%B2%Pt-5%Fe / SiO 2 catalyst:

[0030] 1) The purchased commercial SiO 2 (specific surface area 270m 2 / g) 5.0g was refluxed with 100mL of 5% dilute nitric acid in an oil bath at 100°C for 24h, filtered, washed and dried. Weigh 1.0g of treated SiO 2 Add it to 30mL deionized aqueous solution, and ultrasonically disperse for 1h to obtain suspension A.

[0031] 2) Dissolve 6.6mL of 3mg / mL chloroplatinic acid aqueous solution and 0.721g of ferric nitrate in 50mL of water, mix them evenly, add them to suspension A, and stir at room temperature for 24h.

[0032] 3) The solution in step 2) was stirred and evaporated to dryness in an oil bath at 90°C to obtain solid B.

[0033] 4) Solid B was calcined at 500 °C for 4 h to obtain solid C.

[0034] 5) Dissolve 0.22 g of boric acid in 50 mL of deionized aqueous solution, add to solid C, disperse by ultrasonic for 1 h, then stir and evaporate to dryness in an oil bath at 90°C to obtain solid D.

[0035] 6) Calcining the solid...

Embodiment 2

[0041] 2%B2%Pt-5%Fe / SiC catalyst:

[0042] The preparation method of silicon carbide supported Pt-Fe-B catalyst is the same as embodiment 1, just SiO 2 Change to SiC carrier, and silicon carbide needs to be baked at 800°C for 4h before use. The 2%B2%Pt-5%Fe / SiC catalyst was prepared, and 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, and the results are shown in Table 1.

Embodiment 3

[0044] 2%B2%Pt-5%Fe / CNT catalyst:

[0045] The preparation method of carbon nanotube supported Pt-Fe-B catalyst is the same as embodiment 1, just SiO 2 The CNT (carbon nanotube) carrier was replaced to prepare a 2%B2%Pt-5%Fe / CNT catalyst. 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

A catalytic agent for preparing ethanol by using acetic acid hydrogenation and a preparation method thereof relate to a hydrogenation catalyst and are high in stability and long in service life. The catalytic agent is applicable to a high pressure fixed bed reactor, glacial acetic acid is adopted to serve as raw materials directly, and service life of the catalytic agent is longer than 1000h. The catalytic agent is composed of reactive metal, an accessory ingredient, a protective agent and a carrier, a weight ratio of constitution elements of the reactive metal, the accessory ingredient, the protective agent and the carrier in the catalytic agent is (1-5):(0-10):(0-20):100, the reactive metal is preferentially selected from one of platinum, ruthenium and palladium, the accessory ingredient is preferentially selected from one of Ferrum, cobalt and stannum, the protective agent is preferentially selected from boric acid or tetraethoxysilane, and the carrier is preferentially selected from carbon nano tubes or silica. The catalytic agent is prepared by using an impregnation method. Introduction of the protective agent greatly improves heat stability of the catalytic agent, the method is simple, performance is excellent, stability is high, and the catalytic agent has good industrial application prospects.

Description

technical field [0001] The invention relates to a hydrogenation catalyst, especially a catalyst for hydrogenation of acetic acid to produce ethanol and a preparation method thereof. Background technique [0002] Ethanol is a basic industrial raw material and an important organic solvent, mainly used in food, chemical industry, military industry, medicine and other fields. In recent years, ethanol gasoline is obtained by adding 5% to 20% absolute alcohol to gasoline, which is a kind of non-polluting high-octane Gasoline additives with alkane number can reduce the dependence and consumption of petroleum, and are beneficial to environmental protection. They have become an important energy supplement and strategic resource for the country. The production of ethanol mainly includes biological fermentation method, ethylene hydration method, direct synthesis gas method and indirect synthesis gas method. At present, the industrial production methods of ethanol mainly include grain ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J27/224B01J23/58B01J23/62B01J23/652B01J23/78C07C29/149C07C31/08
Inventor 叶林敏袁友珠李雯婧张博吴文章吴飞明张素斌计扬
Owner XIAMEN UNIV
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