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Method of preparing isopropanol by catalytic conversion of cellulose

A technology for cellulose and isopropanol, applied in the field of isopropanol production, can solve the problems of pre-treatment increasing manufacturing cost, affecting catalytic conversion, low reaction concentration, etc., and achieving excellent isopropanol selectivity, good activity and selectivity , the effect of high isopropanol yield

Active Publication Date: 2012-10-31
ECO ENVIRONMENTAL ENERGY RES INST +1
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AI Technical Summary

Problems solved by technology

These cumbersome pre-processing increases the manufacturing cost, which is not conducive to industrial applications
[0009] In addition to the difficulties of acid addition and pre-treatment mentioned above, many documents and patents have shown that in the catalytic process, the mass ratio of cellulose to water cannot be increased, the reaction concentration is very low, and the requirements for product separation and purification are high. very high
Especially under the condition of high mass ratio of cellulose to water, it is easy to produce coking phenomenon, which greatly affects the progress of catalytic conversion, and is not conducive to the operation and management of equipment

Method used

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  • Method of preparing isopropanol by catalytic conversion of cellulose
  • Method of preparing isopropanol by catalytic conversion of cellulose
  • Method of preparing isopropanol by catalytic conversion of cellulose

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Embodiment Construction

[0020] 1. Preparation of copper chromium catalyst

[0021] The preparation of the catalyst in this example can refer to C.Liang, Z.et al., Catal.Lett. (2009), 130, 169-176; Z.Ma et al., J.Mater.Chem. (2010), 20,755 -760; and Z. Xiao et al., Ind. Eng. Chem. Res. (2011), 50, 2031-2039, which are hereby incorporated by reference in their entirety. Specifically, the following methods can be used:

[0022] (1) Sol-gel method

[0023] Preparation of Cr (NO 3 ) 3 9H 2 O and Cu (NO 3 ) 2 ·3H 2 O in ethanol solution (the metal mass concentration is 0.3 grams per milliliter (g / mL)), and the molar ratios of metal Cu / Cr are controlled to be 0.25, 0.5, 1, 2 and 4, respectively. At 60°C, 18 mL of propylene oxide was added with stirring to obtain a gel. After being dried overnight at 85°C, it was calcined at 500°C in an air atmosphere for 2 hours (h) to obtain a copper-chromium catalyst.

[0024] (2) Carbon template method

[0025] Preparation of Cr (NO 3 ) 3 9H 2 O and Cu (NO ...

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Abstract

The invention relates to a method of preparing isopropanol by cellulose. The method is characterized in that the catalytic reaction is carried out on cellulose in the presence of a copper chromite catalyst so that the cellulose is converted into isopropanol, wherein the copper chromite catalyst comprises a CuCr2O4 active phase or an active phase of a group formed by CuO and Cr2O3, the mass ratio of the cellulose to water is below 15 wt%, and the temperature of the catalytic reaction is 200-270 DEG C.

Description

technical field [0001] The invention relates to a method for producing isopropanol, in particular to a method for producing isopropanol from cellulose. Background technique [0002] Isopropanol is an important chemical product and raw material. It is a solvent with excellent performance and can be miscible with ethanol, ether, chloroform and water. Isopropanol is also an intermediate in the synthesis of various organic compounds, and can be widely used in the fields of pharmaceuticals, cosmetics, plastics, fragrances, coatings, etc. Among them, coatings and inks are its main application areas, accounting for about 10% of the total consumption of isopropanol. 50% of. In addition, another important industrial product, propylene, can be obtained through dehydration of isopropanol, and the industrial demand for propylene is extremely high. [0003] At present, the main method of producing isopropanol is propylene hydration method, which can be divided into propylene indirect h...

Claims

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Application Information

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IPC IPC(8): C07C31/10C07C29/00
CPCB01J37/0203C07C29/132C07C29/00B01J23/86B01J35/0006B01J35/002B01J37/036B01J23/868C07C31/10B01J35/19B01J35/30
Inventor 梁长海肖子辉徐彬王欢
Owner ECO ENVIRONMENTAL ENERGY RES INST
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