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Method for preparing ethylene glycol from cellulose

一种纤维素、乙二醇的技术，应用在化学仪器和方法、羟基化合物制备、催化剂活化/制备等方向，能够解决繁琐、环境污染等问题，达到反应过程简单、避免环境污染问题、高产品收率和选择性的效果

Active Publication Date: 2010-06-09
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the use of cellulose to produce polyhydric alcohols has so many advantages, however, due to the presence of a large number of intramolecular and intermolecular hydrogen bonds in cellulose, the structure of cellulose is very stable. Carry out acid hydrolysis and reuse to obtain glucose for later conversion and utilization
This process is not only cumbersome, but also causes serious environmental pollution [Document 4: Two stage hydrogenolysis of carbonhydrate to glycols using sulfide modified rutheniumcatalyst in second stage, patent, No.US4476331]

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Preparation of metal tungsten catalyst: impregnate the ammonium metatungstate solution (mass concentration: 0.4g / ml) on the activated carbon carrier, dry it in an oven at 120°C for 12 hours, and place it under H 2 Reduction was carried out at 700°C for 1 h in the atmosphere to obtain W / AC with a tungsten loading of 30 wt%.

Embodiment 2

[0023] Preparation of metal nickel-tungsten catalyst: The tungsten catalyst prepared as described in Example 1 is further impregnated with nickel nitrate solution, dried at 120°C, and reduced at 400°C for 2 hours to obtain Ni-W / AC (15%Ni-25%W) catalyst.

Embodiment 3

[0025] Preparation of metal platinum tungsten catalyst: impregnate the ammonium metatungstate solution (mass concentration: 0.2g / ml) on the silica carrier, dry it in an oven at 120°C for 12h, and place it under H 2 Reduction was carried out at 700°C for 1 h in the atmosphere to obtain W / SiO with a tungsten loading of 15 wt%. 2 . Then, it was further impregnated with chloroplatinic acid solution, dried at 120°C, and reduced with hydrogen at 350°C for 2 hours to obtain Pt-W / SiO 2 (0.5%Pt-15%W) catalyst.

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PUM

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Abstract

The invention provides a method for preparing ethylene glycol from cellulose. In the method, the cellulose serves as a reaction raw material; a multi-metallic catalyst consists of catalytic active components comprising transition metals iron, cobalt, nickel, ruthenium, rhodium, palladium, iridium and platinum of groups 8, 9 and 10, and the metallic state, carbides, nitrides and phosphides of molybdenum and tungsten; and the high-efficiency, high-selectivity and high-yield preparation of the ethylene glycol from the cellulose is realized through a catalytic conversion process under a hydrothermal condition that the hydrogen pressure is 1 to 12 MPa and the temperature is between 120 and 300 DEG C. Compared with the ethylene glycol industrial synthesis route taking ethylene as the reaction raw material, the reaction provided by the invention has the remarkable advantages of regenerative raw material, environmental-friendly reaction process and atom economy.

Description

technical field [0001] The invention relates to a method for preparing ethylene glycol from cellulose, in particular to a reaction process in which cellulose undergoes one-step catalytic hydrogenation degradation to prepare ethylene glycol under hydrothermal conditions. Background technique [0002] Ethylene glycol is an important energy liquid fuel, and is also a very important raw material for polyester synthesis, for example, for polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and can also be used As antifreeze, lubricant, plasticizer, surfactant, etc., it is a widely used organic chemical raw material. [0003] At present, the industrial production of ethylene glycol mainly adopts the route of petroleum raw materials, that is, ethylene oxide is obtained after epoxidation of ethylene, and then ethylene glycol is obtained by hydration [Document 1: Cui Xiaoming, Overview of Ethylene Glycol Production and Development at Home and Abroad, Chemistry Industry,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/20C07C29/00B01J23/30B01J23/64B01J27/22B01J27/188B01J23/883B01J23/40B01J23/74
CPCB01J21/18C07C31/20C07C29/00B01J27/25B01J23/883B01J23/888B01J23/652B01J27/22B01J37/02B01J23/85B01J21/063B01J23/6527B01J27/19Y02P20/52C07C29/132C07C31/202
Inventor 张涛郑明远纪娜王爱琴舒玉瑛王辉王晓东
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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