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A system for producing carbonates and a method for producing carbonates using the system

A carbonic acid ester and ethylene carbonate technology, which is applied to a system for producing carbonic acid esters and the field of producing carbonic acid esters by using the system, can solve the problems of poor EC color of products, easy deactivation of catalysts, low product yields, etc., and shorten the residence time. , the effect of high production efficiency and less by-products

Active Publication Date: 2021-03-19
CHINA NAT OFFSHORE OIL CORP +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the technical problems in the prior art for preparing carbonates such as reaction temperature, high pressure, low product yield, easy deactivation of catalyst, and poor color of product EC, the purpose of the present invention is to provide a system for producing carbonates and A method for producing carbonate by using the system, in particular to a bubble column system for producing carbonate and a method for preparing ethylene carbonate using ethylene oxide and carbon dioxide as raw materials using the system

Method used

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  • A system for producing carbonates and a method for producing carbonates using the system

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Experimental program
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Embodiment 1

[0062] This embodiment provides a system for producing carbonate, the system includes a first bubble column 101, a second bubble column 102, a heat exchanger 201, a gas-liquid separator 301 and a vacuum distillation column 301, the first The top of bubble column 101 is provided with raw material and catalyst inlet 1 and the first circulation inlet 2 that communicates with heat exchanger 201 top outlets, and the bottom of described first bubble column 101 is provided with the second bubble column 102 top outlets. A connected second circulation inlet 3, the bottom of the first bubble column 101 is provided with a product outlet 4 communicating with the bottom of the second bubble column 102;

[0063] The bottom of the second bubble column 102 is provided with a gas inlet 5, the inside of the second bubble column 102 is provided with a demister near the top position, and the top of the second bubble column 102 is provided with an overflow outlet 6 , the overflow outlet 6 communic...

Embodiment 2

[0066] The present embodiment provides a kind of method adopting the system described in embodiment 1 to produce carbonate, described method comprises the following steps:

[0067] (a) feed the mixture of oxirane and homogeneous catalyst from raw material and catalyst inlet 1 to the first bubble column 101, and oxyethane enters the first from the second circulation inlet 3 under the effect of homogeneous catalyst CO of a bubble column 101 2 The gas undergoes a countercurrent reaction to produce ethylene carbonate EC;

[0068] (b) In the second bubble column 102 (turbulent bubbling state), the CO passed into from the gas inlet 5 2 The gas carries out mass exchange and heat exchange with ethylene carbonate from the first bubble column 101 (quiet bubbling state), which not only realizes CO 2 At the same time, the residual ethylene oxide in ethylene carbonate is replaced to realize the cycle of ethylene oxide;

[0069] According to the incoming CO 2 The gas volume and the amou...

Embodiment 3

[0077] The system and operating method adopted are the same as in Embodiment 1, the difference is the following operating conditions: CO in the first bubble column 101 2 The molar ratio to EO is 1.3:1, the bed temperature of the first bubble column 101 is 110°C, the countercurrent reaction pressure is 2MPa, and the total residence time is 2h.

[0078] The specific activity data are shown in Table 1.

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Abstract

The invention relates to a system for producing carbonic ester and a method for producing the carbonic ester by utilizing the system. The system comprises a first bubble tower, a second bubble tower and a heat exchanger, wherein the upper part of the first bubble tower is provided with a raw material and catalyst inlet and a first circulation inlet communicated with an outlet in the top of the heat exchanger, the lower part of the first bubble tower is provided with a second circulation inlet communicated with an outlet in the top of the second bubble tower, and the bottom of the first bubbletower is provided with a product outlet communicated with the lower part of the second bubble tower; the bottom of the second bubble tower is provided with a gas inlet, the upper part of the second bubble tower is provided with an overflow outlet, and the outflow outlet is communicated with the bottom of the heat exchanger and a discharge opening. By adopting the system to produce the carbonic ester, the standing time can be shortened, the reaction temperature and pressure can be lowered, the reaction efficiency and an EO (ethylene oxide) conversion rate can further be improved, and even 'zero' emission is realized, so that ethylene carbonate can be prepared from ethylene oxide and carbon dioxide in an environment-friendly mode.

Description

technical field [0001] The present invention relates to a system for producing carbonate and a method for producing carbonate by using the system, in particular to a bubble column system for producing carbonate and using the system to prepare ethylene carbonate with ethylene oxide and carbon dioxide as raw materials method. Background technique [0002] Carbon dioxide is the most important greenhouse gas that causes global warming, and its global annual emissions have reached tens of billions of tons. Its recovery, fixation, and resource utilization have become issues of close concern to countries all over the world. From the perspective of resource utilization, CO 2 It is the most abundant and cheap carbon one (7) resource in the world, therefore, vigorously develop CO 2 It is of great economic and environmental significance to make green use of technology, develop a green, high-tech fine chemical industry chain, and increase the added value of products. Ethylene carbona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D317/38B01J8/22B01J8/08B01D19/02
CPCB01D19/02B01J8/087B01J8/22B01J2208/00017B01J2208/00044B01J2208/00769C07D317/38
Inventor 何霖王凯王科傅送保谭亚南侯章贵程牧曦张卉韩伟柴文正
Owner CHINA NAT OFFSHORE OIL CORP
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