Utilize transition metal phosphide catalyst to catalyze the method for hydrogenation of acetic acid to produce ethanol

A transition metal and catalyst technology, which is applied in the field of catalyzing acetic acid hydrogenation to produce ethanol by using transition metal phosphide catalyst, can solve the problems of high price and high production cost of ethanol, and achieves good activity stability, stable device operation time and environmental impact. small effect

Active Publication Date: 2018-02-13
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method of using transition metal phosphide catalysts to catalyze the hydrogenation of acetic acid to produce ethanol, which solves the problem of high ethanol production costs caused by the high price of supported palladium or platinum catalysts

Method used

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  • Utilize transition metal phosphide catalyst to catalyze the method for hydrogenation of acetic acid to produce ethanol
  • Utilize transition metal phosphide catalyst to catalyze the method for hydrogenation of acetic acid to produce ethanol
  • Utilize transition metal phosphide catalyst to catalyze the method for hydrogenation of acetic acid to produce ethanol

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Example 1: 1% Ni 2 P / γ-Al 2 o 3 Catalyst preparation

[0045] γ-Al 2 o 3 As a carrier (its specific surface area is 296m 2 / g), with Ni(H 2 PO 2 ) 2 ·6H 2 O as nickel source, with Ni(H 2 PO 2 ) 2 ·6H 2 O and NaH 2 PO 2 ·H 2 O as phosphorus source, weigh 10g of γ-Al 2 o 3 Carrier, consisting of 0.4g (1.3478×10 - 3 mol) of Ni(H 2 PO 2 ) 2 ·6H 2 O, 0.43g (4.057×10 -3 mol) of NaH 2 PO 2 ·H 2 O and distilled water to prepare 8.0 mL impregnation solution with nickel and phosphorus concentrations of 1.6848 × 10 -4 mol / mL, 8.4413×10 -4 mol / mL, the volume of the impregnating solution is equal to the volume of the maximum adsorbed water of the catalyst carrier, and the molar ratio of nickel and phosphorus atoms in the impregnating solution is 1:5. Carry out impregnation at room temperature according to the equal volume impregnation method, add 8.0mL impregnation solution dropwise to 10g carrier, and keep stirring. After the dropwise addition, it was ...

Embodiment 2

[0046] Example 2: 5% Ni 2 P / Al 2 o 3 Catalyst preparation

[0047] with Al 2 o 3 Carrier (its specific surface area is 302m 2 / g), Ni(H 2 PO 2 ) 2 ·6H 2 O nickel source, Ni(H 2 PO 2 ) 2 ·6H 2 O and NaH 2 PO 2 ·H 2 O phosphorus source to prepare supported catalyst. Weigh 10g of Al 2 o 3 , consisting of 2.0g (6.739×10 -3 mol) of Ni(H 2 PO 2 ) 2 ·6H 2 O, 1.43g (1.3492×10 -2 mol) of NaH 2 PO 2 ·H 2 O and distilled water to prepare 8.0 mL impregnation solution with nickel and phosphorus concentrations of 8.4238 × 10 -4 mol / mL, 3.3713×10 -3 mol / mL, the volume of the impregnating solution is equal to the volume of the maximum adsorbed water of the catalyst carrier, and the molar ratio of nickel and phosphorus atoms in the impregnating solution is 1:4. Carry out impregnation at room temperature according to the equal volume impregnation method, add 8.0mL impregnation solution dropwise to 10g carrier, and keep stirring. After the dropwise addition, it was ...

Embodiment 3

[0048] Example 3: 10% Ni 2 P / SiO 2 Catalyst preparation

[0049] Use porous silica gel carrier (its specific surface area is 480m 2 / g), Ni(H 2 PO 2 ) 2 ·6H 2 O nickel source, Ni(H 2 PO 2 ) 2 ·6H 2 O and NaH 2 PO 2 ·H 2 O phosphorus source to prepare supported catalyst. Weigh 10g of porous silica gel, from 4.0g (1.3478 × 10 - 2 mol) of Ni(H 2 PO 2 ) 2·6H 2 O, 1.43g (1.3492×10 -2 mol) of NaH 2 PO 2 ·H 2 O and distilled water to prepare 12 mL of impregnation solution with nickel and phosphorus concentrations of 1.1232 × 10 -3 mol / mL, 3.3707×10 -3 mol / mL, the volume of the impregnating solution is equal to the volume of the maximum adsorbed water of the catalyst carrier, and the molar ratio of nickel and phosphorus atoms in the impregnating solution is 1:3. Carry out impregnation at room temperature according to the equal volume impregnation method, add 12mL impregnation solution dropwise to 10g carrier, and keep stirring. After the dropwise addition, it...

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Abstract

The invention discloses a method for catalyzing the hydrogenation of acetic acid to produce ethanol by using a transition metal phosphide catalyst. Under the condition that the molar ratio of hydrogen to acetic acid is 1:1 to 20:1, acetic acid and hydrogen are mixed, and contacted and reacted with a supported transition metal phosphide catalyst to hydrogenate acetic acid to produce ethanol; the process of the invention is simple, and the catalyst price Lower, the catalyst performance stability is good, the stable operation time of the device is long, the frequent switching operation of the reactor reaction and regeneration can be avoided, the catalyst can be regenerated, the post-treatment of a large number of spent catalysts can be avoided, and the impact on the environment is small.

Description

(1) Technical field [0001] The invention relates to a method for preparing ethanol by using a transition metal phosphide catalyst to catalyze the hydrogenation of acetic acid, in particular to a method for preparing ethanol by using a supported transition metal phosphide catalyst for hydrogenating acetic acid. (2) Background technology [0002] As the contradiction between oil supply and demand intensifies and the pressure on the environment becomes increasingly heavy, countries around the world generally pay attention to alternative energy sources, and fuel ethanol has sprung up and developed rapidly. Ethanol is a high-quality liquid fuel with low sulfur and ash content, similar combustion performance to gasoline, high oxygen content and octane number, complete combustion and low carbon monoxide emissions compared with ordinary gasoline, and the use of ethanol gasoline can significantly To reduce environmental pollution caused by burning gasoline, ethanol is called the "gre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/149C07C31/08B01J27/19B01J27/188B01J27/185
CPCY02P20/584
Inventor 任杰程义安金辉
Owner ZHEJIANG UNIV OF TECH
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