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Method for producing ethylene glycol and 1,2-propylene glycol by continuously hydrocracking cellulose

A hydrocracking and cellulose technology, applied in 1, can solve the problems of time-consuming, waste of energy and materials, inconvenient operation, etc., and achieve the effect of reducing production cost, saving use cost and reducing consumption

Active Publication Date: 2012-08-22
中科柏易金(郑州)新能源科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

From the perspective of large-scale industrial applications, batch operation is not only time-consuming, inconvenient to operate, but also a waste of energy and materials

Method used

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  • Method for producing ethylene glycol and 1,2-propylene glycol by continuously hydrocracking cellulose
  • Method for producing ethylene glycol and 1,2-propylene glycol by continuously hydrocracking cellulose
  • Method for producing ethylene glycol and 1,2-propylene glycol by continuously hydrocracking cellulose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The 20wt% cellulose water mixture and the dissolved ammonium metatungstate 0.1wt% (by weight of metal tungsten) aqueous solution enter the hydrogenation reactor through the high-pressure pump, and the reactor is filled with slurry Raney nickel and tungstic acid Catalyst (the weight ratio of nickel to tungsten is 10:1, and the catalyst is submerged in water as a solvent at the beginning of the reaction), and the weight ratio of cellulose raw material to catalyst (the sum of the weight of nickel and tungsten elements) is between 20:1 and 18:1 , with a volumetric space velocity of 0.1 to 0.2. The temperature of the reactor is 240-250° C., and the hydrogen pressure is 8 MPa. Hydrogen enters from the bottom of the reactor and stirs the catalyst slurry. The reactant enters the reactor and after reaction, the liquid product is discharged from the upper outlet of the reactor, accompanied by 1-2% solid catalyst hydrogen and gas product. The reactor effluent then enters a separ...

Embodiment 2

[0043] The cellulose aqueous solution slurry of 10wt% is entered hydrogenation reactor by high-pressure pump, is filled with the Ru / AC of slurry state and tungstic acid catalyst (the weight ratio of ruthenium and tungsten is 5: 1 in the reactor, reacts initial stage with water as solvent immersion catalyst), the weight ratio of the cellulose raw material to the catalyst (the sum of the weights of ruthenium and tungsten elements) is between 50:1 and 45:1, and the volume space velocity is 0.5 to 1. The temperature of the reactor is 250-260° C., and the hydrogen pressure is 6 MPa. Hydrogen enters from the bottom of the reactor and stirs the catalyst slurry. The liquid product is discharged from the upper outlet of the reactor, accompanied by part of the hydrogen and the gas product. Then the reactor effluent enters the separator to separate the gas and liquid parts.

[0044] The gas part separated by the separator is further separated into pure hydrogen by the membrane separati...

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Abstract

The invention provides a method for producing ethylene glycol and 1,2-propylene glycol by continuously hydrocracking cellulose and particularly relates to a continuous reaction technological process for producing ethylene glycol and 1,2-propylene glycol by virtue of transformation of semi-homogeneous catalyzed and hydrocracked cellulose. In the technological process, the cellulose is hydrocracked in the presence of a catalyst in a reactor and then enters into a separation system; hydrogen in a gas phase is recycled by separation and recovery; a liquid-phase product part is refluxed to the reactor, the other liquid-phase products are refined so as to separate out glycol, propylene glycol and other polyatomic; and the concentrated soluble catalyst component existing in the refined and separated residual heavy component liquid phase can be partially circulated to the reactor.

Description

technical field [0001] The invention relates to a process for producing ethylene glycol and 1,2-propanediol from cellulose, in particular to a continuous reaction for producing ethylene glycol and 1,2-propanediol through semi-homogeneous catalytic hydrogenation cracking of cellulose crafting process. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/20C07C29/00C07C31/22C07C31/12C07C31/26C07C49/17C07C45/51
CPCC07C29/132C07C29/60C07C31/202C07C31/205
Inventor 张涛郑明远王爱琴邰志军
Owner 中科柏易金(郑州)新能源科技有限责任公司
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