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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: 2007-10-17
SHANGHAI HUAYI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 / glycerol ratio (400: 1~600: 1) leads to a large amount of hydrogen circulation, and the reaction is carried out in the gas phase, and then the deficiency of the large energy consumption of the reaction; during the reaction in the present invention, glycerol mainly exists in a 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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10

[0017] Catalyst preparation:

[0018] 1. Hybrid method

[0019] 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.

[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%

diatomaceous earth

Example 8

Ni, 20; Mo, 6%

Phosphotungstic heteropoly acid

Example 9...

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PUM

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Abstract

The invention provides a method for preparing normal propyl alcohol by glycerol hydrogenation, wherein glycerite or biodiesel byproduct glycerol which is diluted by glycerol or solvent reacting with hydrogen or gaseous mixture containing hydrogen to generatenormal propyl alcohol, which provides a new way for synthesizing normal propyl alcohol. The present invention can enhance activity of glycerol hydrogenation and selectively generates normal propyl alcohol, also can make normal propyl alcohol united generating with 1,2-propanediol, ethandiol, methylic alcohol and ethyl hydrate, thus its product process program is very flexible. The present invention is characterized in that its technological condition is geniality, raw material is cheap and can be obtained easily and the cost of manufacture is low, which belongs to environment friendly green chemical industry technique.

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 Applications(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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