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Solid catalyst for process of preparing ethylene glycol by hydrolyzing ethylene carbonate and preparation method thereof

A solid catalyst, ethylene carbonate technology, applied in physical/chemical process catalysts, hydrolysis preparation, chemical instruments and methods, etc., can solve the problems of difficult catalyst recovery and high cost, achieve long life, reduce reaction costs, and simple operation methods Effect

Active Publication Date: 2015-07-01
CHANGZHOU XIAOGUO INFORMATION SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved in the present invention is to aim at the defects such as difficulty in catalyst recovery and high cost in the transesterification reaction of current ionic liquid catalysts.

Method used

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  • Solid catalyst for process of preparing ethylene glycol by hydrolyzing ethylene carbonate and preparation method thereof
  • Solid catalyst for process of preparing ethylene glycol by hydrolyzing ethylene carbonate and preparation method thereof
  • Solid catalyst for process of preparing ethylene glycol by hydrolyzing ethylene carbonate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add acetonitrile, mesoporous foamed silica and 3-chloropropyl isocyanate in sequence in a round bottom flask, wherein the mass ratio of mesoporous foamed silica to acetonitrile is 1:10; mesoporous foamed silica and 3-chloropropyl isocyanate The mass ratio is 8:1; after reacting at room temperature for 8 hours, the mesoporous foamed silicon oxide with surface hydroxyl esterification is obtained.

[0032] After filtering, washing and drying, put the solid obtained in the above process into a round bottom flask, then add toluene and 1-methylimidazole in sequence, wherein the mass ratio of solid to toluene is 1:10, and the solid to 1-methylimidazole The mass ratio is 5:1, and heated to 80°C for 6 hours with magnetic stirring to obtain a solid catalyst, denoted as Cat1.

Embodiment 2

[0034] Add acetonitrile, mesoporous foamed silica and 3-chloropropyl isocyanate in sequence in a round bottom flask, wherein the mass ratio of mesoporous foamed silica to acetonitrile is 1:20; mesoporous foamed silica and 3-chloropropyl isocyanate The mass ratio is 8:1; after reacting at room temperature for 6 hours, the mesoporous foamed silicon oxide with surface hydroxyl esterification is obtained.

[0035] After filtering, washing and drying, put the solid obtained in the above process into a round bottom flask, then add toluene and 1-methylimidazole in sequence, wherein the mass ratio of solid to toluene is 1:20, and the solid to 1-methylimidazole The mass ratio of the catalyst is 7:1, heated to 80°C with magnetic stirring for 8 hours, and the solid catalyst can be obtained, which is denoted as Cat2.

Embodiment 3

[0037] Add acetonitrile, mesoporous foamed silica and 3-chloropropyl isocyanate in sequence in a round bottom flask, wherein the mass ratio of mesoporous foamed silica to acetonitrile is 1:15; mesoporous foamed silica and 3-chloropropyl isocyanate The mass ratio is 10:1; after reacting at room temperature for 8 hours, the mesoporous foamed silicon oxide with surface hydroxyl esterification is obtained.

[0038]After filtering, washing and drying, put the solid obtained in the above process into a round bottom flask, then add toluene and 1-methylimidazole in sequence, wherein the mass ratio of solid to toluene is 1:10, and the solid to 1-methylimidazole The mass ratio is 6:1, heated to 80°C with magnetic stirring for 8 hours to obtain a solid catalyst, denoted as Cat3.

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Abstract

The invention relates to a solid catalyst for a process of preparing ethylene glycol by hydrolyzing ethylene carbonate and a preparation method thereof. According to the preparation method, the solid catalyst for the process of preparing ethylene glycol by hydrolyzing ethylene carbonate is prepared by using mesoporous foam silicon oxide as a carrier, 3-chloropropyl isocyanate and 1-methylimidazole as raw materials through a two-step reaction. The method is simple in operation, the prepared solid catalyst can be recycled through simple treatment after the catalyst reacts, is long in service life and does not have pollution, and the production cost can be greatly reduced. The catalyst prepared by the method is used in an ethylene carbonate hydrolysis reaction and obtains a good catalytic effect, the conversion rate of ethylene carbonate is over 95 percent, and the ethylene glycol selectivity is 100 percent.

Description

technical field [0001] The invention relates to the field of preparation of solid catalysts, in particular to a solid catalyst used in the process of hydrolyzing ethylene carbonate to prepare ethylene glycol and a preparation method thereof. Background technique [0002] Ethylene glycol (EG) is an important organic chemical raw material widely used in the production of polyester fibers, antifreeze, polyester plastics, unsaturated resins, lubricants, plasticizers, nonionic surfactants and explosives. At present, the main method for industrially synthesizing EG is direct hydration of ethylene oxide (EO), which has disadvantages such as long process flow, high water ratio, high energy consumption, and low selectivity (<90%). The new processes that have been developed include EO catalytic water synthesis method, ethylene carbonate method, synthesis gas synthesis method, etc. Among them, the ethylene carbonate method is considered to be one of the most industrialized productio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02C07C31/20C07C29/12
CPCY02P20/52Y02P20/584
Inventor 李永昕薛冰许杰柳娜
Owner CHANGZHOU XIAOGUO INFORMATION SERVICES
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