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A device and method for preparing cyclic carbonates integrating absorption, separation and catalytic reaction

A cyclic carbonate and catalytic reaction technology, applied in thin-film liquid-gas reaction, organic chemistry, etc., can solve the problems of low energy consumption, reduce equipment investment, etc., achieve high economic value, reduce energy consumption, overcome the The effect of catalyst separation from product and feedstock

Active Publication Date: 2021-04-20
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In view of the problems existing in the prior art, the present invention provides a device for preparing cyclic carbonates that integrates absorption, separation and catalytic reaction. The device uses an ionic liquid membrane containing three functional groups to separate the reactor Separated into isolated chambers, the alkylene oxide and carbon dioxide in different chambers can be adsorbed on the ionic liquid membrane to react to form a cyclic carbonate, which integrates the absorption of alkylene oxide raw materials, efficient reaction and product separation, reducing The device investment is reduced; the method for preparing cyclic carbonates by using the device not only overcomes the problem of high energy consumption for the separation of alkylene oxides and the production of by-products when water is used as absorbent, but also greatly simplifies the production of existing cyclic carbonates. The production process has the advantages of low energy consumption and no need to separate catalysts

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  • A device and method for preparing cyclic carbonates integrating absorption, separation and catalytic reaction
  • A device and method for preparing cyclic carbonates integrating absorption, separation and catalytic reaction
  • A device and method for preparing cyclic carbonates integrating absorption, separation and catalytic reaction

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preparation example Construction

[0084] The device and flow diagram of the preparation of cyclic carbonate provided by the invention are as follows figure 1 As shown: the device includes an ionic liquid membrane reactor; the ionic liquid membrane reactor includes a reactor body 1 and an ionic liquid membrane 2; the ionic liquid membrane 2 divides the inside of the reactor body 1 into an isolated cavity; The device also includes a reactor heating device 3, an alkylene oxide heat exchanger 4 and a carbon dioxide heat exchanger 5; the device also includes a gas-liquid separator 7 connected to the ionic liquid membrane reactor, and is arranged at the Circulation pump 6 between the outlet of device 7 and the inlet of reactor main body 1.

[0085] Its technological process includes the following steps:

[0086] A certain concentration of ethylene oxide mixed gas is preheated by the alkylene oxide heat exchanger 4 and then passed into the shell gas path cavity of the main body 1 of the ionic liquid membrane reactor...

Embodiment 1

[0112] This embodiment provides a device for preparing cyclic carbonates that integrates absorption, separation and catalytic reactions. The device includes an ionic liquid membrane reactor, and the ionic liquid membrane reactor includes a reactor body and an ionic liquid membrane. The ionic liquid membrane is a [DMAEMA-EtOH]Br ionic liquid membrane 1 formed in the form of copolymerization, and 20 groups of ionic liquid membranes 1 form a tube bundle and are loaded into a membrane module to obtain a tubular membrane reactor. It is divided into 21 separated cavities, namely the first gas path cavity and the second gas path cavity, and there is a transmembrane pressure difference between the first gas path cavity and the second gas path cavity.

[0113] The device also includes a reactor jacket heat exchange device, the device also includes an alkylene oxide heat exchanger and a carbon dioxide heat exchanger, and a gas-liquid separator connected to the ionic liquid membrane react...

Embodiment 2

[0115] This embodiment provides a device for preparing cyclic carbonates that integrates absorption, separation and catalytic reactions. The device includes an ionic liquid membrane reactor, and the ionic liquid membrane reactor includes a reactor body and an ionic liquid membrane. The ionic liquid membrane is an ionic liquid membrane 14, and five groups of plate-type ionic liquid membranes 14 are packed into a membrane module to obtain a plate-and-frame membrane reactor. The frame-type membrane reactor is divided into 6 separated cavities, respectively The gas path cavity and the second gas path cavity, there is a transmembrane pressure difference between the first gas path cavity and the second gas path cavity.

[0116] The device also includes a coil heat exchanger inside the reactor, the device also includes an alkylene oxide heat exchanger and a carbon dioxide heat exchanger, and a gas-liquid separator connected with the ionic liquid membrane reactor; the gas-liquid separa...

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Abstract

The invention provides a device for preparing cyclic carbonate which integrates absorption, separation and catalytic reaction. The device divides the reactor into isolated cavities by using an ionic liquid membrane containing three functional groups, which can make The alkylene oxide and carbon dioxide in different chambers are adsorbed on the ionic liquid membrane to react to form a cyclic carbonate, which simplifies the production process of the cyclic carbonate and facilitates the separation of the cyclic carbonate and the alkylene oxide; using The method for preparing cyclic carbonates by the device integrates the absorption of alkylene oxide raw materials, high-efficiency reaction and easy separation of products, overcomes the problems of high energy consumption for the separation of alkylene oxide and the generation of by-products when water is used as the absorbent, and has the advantages of Advantages such as low energy consumption and no need to separate catalysts.

Description

technical field [0001] The invention relates to the technical field of cyclic carbonate production, in particular to a device and method for preparing cyclic carbonate which integrates absorption, separation and catalytic reaction. Background technique [0002] Cyclic carbonates, such as ethylene carbonate (EC) and propylene carbonate (PC), are organic solvents with high boiling point and high polarity with excellent performance. They are used in the synthesis of pharmaceutical and fine chemical intermediates, organic synthesis, cosmetics, and metal extraction. It is widely used in the field of desulfurization and decarbonization (carbon dioxide) in industrial sectors such as natural gas purification, urea and hydrogen production. In recent years, the market demand for cyclic carbonates as intermediates of transesterification has surged. [0003] At present, the synthesis methods of cyclic carbonates mainly include phosgene method, transesterification method and cycloadditi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D317/36C07D317/38B01J10/02
CPCB01J10/02C07D317/36C07D317/38
Inventor 成卫国刘一凡董丽苏倩张增亮张锁江
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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