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Process for preparing n-propanol by hydrogenating glycerol

A technology for the preparation of n-propanol and hydrogen, applied in chemical instruments and methods, preparation of hydroxyl compounds, and preparation of organic compounds, etc., can solve the problems of large reaction energy consumption, large amount of hydrogen circulation, etc., to overcome low selectivity, raw material The effect of cheap and easy to obtain, flexible product process scheme

Active Publication Date: 2009-09-09
SHANGHAI HUAYI NEW MATERIAL
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  • Description
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Problems solved by technology

[0004] The present invention adopts supported catalyst, in low H 2 Under the ratio of glycerin / glycerol, glycerol is hydrogenated to generate n-propanol, which avoids the use of very high H in WO2007010299 patent 2 / glycerin ratio (400:1~600:1) causes the large amount of hydrogen circulation, and the reaction is carried out in the gas phase, and then makes the deficiency of large energy consumption of the reaction; during the reaction in the present invention, glycerol mainly exists in liquid state, that is, glycerol plus The hydrogen reaction is carried out in a gas-liquid-solid three-phase state (glycerin is mainly liquid, hydrogen is gaseous, and the catalyst is solid), and the selectivity of n-propanol is greatly improved, overcoming the low selectivity of n-propanol in the patent of WO2007010299 Shortcomings

Method used

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Embodiment 1～10

[0016] Catalyst preparation:

[0017] 1. Hybrid method

[0018] The soluble salt aqueous solution or oxide containing active components is added to the catalyst carrier according to a certain metering ratio, mixed uniformly and extruded or pressed into tablets, then dried at 120°C for 20 hours, and calcined at 550°C for 4 hours. The composition of the catalyst in each embodiment is shown in Table 1.

[0019] Table 1. Catalyst composition prepared by mixing method

[0020] Example Components and their mass percentages carrier Example 1 Co, 5%; Ni, 23% γ-Al 2 o 3 Example 2 Mn, 15%; Cu, 20% SiO 2 Example 3 Cu, 10%; Cr, 12% Amorphous Si-Al Example 4 Cu, 20%; Zn, 15% HZSM-5 molecular sieve Example 5 Cu, 20%; Zn, 10%; Cr, 15% HMCM-49 molecular sieve Example 6 Cu, 18%; Mo, 5% activated clay Example 7 Cr, 5%; Ni, 22% diatomite Example 8 Ni, 20; Mo, 6% Phosphotungstic heteropoly acid Example ...

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Abstract

The invention provides a method for preparing n-propanol by hydrogenating glycerin. Glycerol or solvent-diluted glycerin solution or biodiesel by-product glycerol reacts with hydrogen or hydrogen-containing mixed gas to generate n-propanol under the action of a supported catalyst, which provides a new way for the synthesis of n-propanol. In the present invention, by adjusting the catalyst composition or only changing the reaction process conditions, glycerin can be hydrogenated with high activity and high selectivity to generate n-propanol, and n-propanol can also be co-produced with 1,2-propanediol and ethylene glycol. Production, or co-production with methanol and ethanol, the product process scheme is flexible. The invention has mild reaction process conditions, cheap and easy-to-obtain raw materials, and low production cost, and belongs to an environment-friendly green chemical process.

Description

technical field [0001] The invention relates to a method for preparing n-propanol by hydrogenation of glycerol, specifically, a reaction pathway and a catalyst for producing n-propanol by reacting with hydrogen under the action of a supported catalyst using biological glycerin or synthetic glycerin as a raw material , reaction process conditions and reactor type. Background technique [0002] N-propanol is a good solvent, which can be used in coatings, printing inks, daily chemicals and other fields directly or through the synthesis of propyl acetate. Using n-propanol as raw material can synthesize n-propylamine, propyl acetate, propyl urea, 2-methyl-2-pentanol, n-bromopropane, perfluoropropionic acid, propyl p-hydroxybenzoate and propylparaben, etc. . N-propanol is used in the pharmaceutical industry to produce probenecid, sodium valproate, erythromycin, ammonium propionsulfate, dipropyl 2,5-pyridinedicarboxylate, etc. The most important derivative of n-propanol is n-pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/10C07C29/00B01J23/755B01J23/889B01J23/76
Inventor 张春雷宁春利刘汉勇焦昆张猛邵敬铭
Owner SHANGHAI HUAYI NEW MATERIAL
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