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Method for preparing ethylene glycol from ethylene

A technology of ethylene glycol and ethylene, which is applied in the direction of chemical instruments and methods, hydrolysis preparation, organic compound/hydride/coordination complex catalyst, etc., can solve the problems of complicated ethylene glycol process and high energy consumption, and achieve reduction Occurrence of side reactions, improvement of reaction selectivity, and the effect of maintaining activity

Active Publication Date: 2014-01-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But still haven't fundamentally solved the problem of complicated process and high energy consumption of preparing ethylene glycol from ethylene oxide

Method used

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  • Method for preparing ethylene glycol from ethylene

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In the polymerization kettle, add 5.5g of titanium-silicon molecular sieve powder, 1g of Hβ zeolite, 90g of polymerized monomer styrene and 30g of divinylbenzene, 60g of pore-forming agent liquid wax, stir and mix evenly, when the temperature of the water bath is raised to 60°C, add The initiator was 1.5 g of benzoyl peroxide, and the polymerization reaction temperature was 90° C. for 6 hours to obtain a block titanium-silicon molecular sieve composite catalyst. Then carry out crushing and granulation, select a catalyst with a suitable particle size after screening, add 250 ml of 1,2-dichloroethane to swell, and swell for 5 hours at normal temperature. After pouring out 1,2-dichloroethane, add 200ml of ethyl acetate for solvent extraction, the extraction reaction temperature is 55°C, and the extraction time is 4 hours. The same method is used for three extractions to obtain the titanium-silicon molecular sieve composite catalyst A , and its physical and chemical propert...

Embodiment 2

[0040] In the polymerization kettle, add 15g of titanium-silicon molecular sieve powder, 3g of H-ZSM-5 molecular sieve, 90g of polymerized monomer styrene, 15g of divinyltoluene, 25g of divinylxylene, and pore-forming agent C 5 60g of aliphatic alcohol, stirred and mixed evenly, when the temperature of the water bath was raised to 80°C, 2.0g of initiator azobisisobutanol was added, and the reaction temperature was polymerized at 100°C for 6 hours to obtain a block titanium silicon molecular sieve catalyst. Then carry out crushing and granulation, select a catalyst with a suitable particle size after screening, add 250 ml of 1,2-dichloroethane to swell, and swell for 5 hours at normal temperature. After pouring out the 1,2-dichloroethane, add 200ml of xylene to carry out solvent extraction, the extraction reaction temperature is 55°C, and the extraction time is 4 hours. The same method is used for three extractions to obtain the titanium-silicon molecular sieve composite catalys...

Embodiment 3

[0042] The weight of the titanium-silicon molecular sieve powder in Example 1 was changed to 30 g, and 3 g of mordenite was added, and the rest was the same as in Example 1 to obtain a titanium-silicon molecular sieve composite catalyst C, whose physical and chemical properties are shown in Table 1.

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Abstract

The invention discloses a method for preparing ethylene glycol from ethylene. The method comprises the following step of: directly performing one-step epoxidation and hydration reaction on the ethylene and hydrogen peroxide in the presence of a titanium-silicon molecular sieve composite catalyst to prepare the ethylene glycol, wherein the catalyst consists of a titanium-silicon molecular sieve, an acidic molecular sieve and resin. In the method, the titanium-silicon molecular sieve composite catalyst is adopted, so that a process for preparing the ethylene glycol from the ethylene on a fixed bed is implemented, the problems of complicated steps and high energy consumption in the conventional process of preparing the ethylene glycol by ethylene epoxidation and ethylene oxide hydration two-step reaction are solved, and reaction efficiency is improved.

Description

technical field [0001] The invention belongs to a preparation method of ethylene glycol, which is suitable for the catalytic reaction process of preparing ethylene glycol through epoxidation and hydration of ethylene. Background technique [0002] Since the Italian Enichem company first synthesized the lattice oxygen-selective titania-silicon molecular sieve catalyst TS-1 in 1983, it has become a hot spot in the research of oxidation catalysts due to its excellent oxidation selectivity and mild reaction conditions, and this discovery is regarded as environmentally friendly. A major breakthrough in catalyst development. [0003] Titanium-silicon molecular sieve catalysts play a very important role in the epoxidation of olefins. For the epoxidation of low-carbon olefins, the liquid-phase epoxidation process uses titanium-silicon molecular sieves as catalysts and hydrogen peroxide as the oxidant; due to the reaction Mild conditions, high product selectivity, and environmental ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/20C07C29/10B01J31/38
CPCY02P20/52
Inventor 王海波孙万付勾连科宋丽芝薛冬
Owner CHINA PETROLEUM & CHEM CORP
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