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Ethylene carbonate production equipment system and production method thereof

A technology for ethylene carbonate and production equipment, applied in the field of chemical product synthesis technology, can solve problems such as ethylene oxide removal, and achieve the effects of reducing exhaust gas emissions, reducing side reactions, and improving the uniformity of bubble distribution

Active Publication Date: 2019-12-31
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, there is no report on the removal of trace ethylene oxide in the esterification reaction solution.

Method used

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  • Ethylene carbonate production equipment system and production method thereof
  • Ethylene carbonate production equipment system and production method thereof
  • Ethylene carbonate production equipment system and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as Figure 1-4 Shown, the production equipment system of a kind of ethylene carbonate provided by the present invention comprises gas drier 1, compressor 2, surge tank 3, the first condenser 4, the first bubble column 5, preheater 6, the first Two condensers 7, the second bubble column 8, stripper 9, ethylene carbonate refining unit, ethylene carbonate recovery tower 12, mixed liquid delivery pipe 13 and carbon dioxide delivery pipe 14, described mixed solution delivery pipe 13 and all The first bubble column 5 is connected to transport ethylene oxide, ethylene carbonate solution, catalyst and auxiliary agent for the first bubble column 5, and the first condenser 4 is connected with the first bubble column The top of 5 is connected by pipeline, the first condenser 4, the gas dryer 1, the compressor 2, the buffer tank 3, the preheater 6, and the first bubble column 5 The bottom of the bottom of the pipeline is connected sequentially, and the bottom of the carbon di...

Embodiment 2

[0050] This embodiment discloses a kind of production method of ethylene carbonate of the present invention, adopts the production equipment system described in embodiment 1 to carry out,

[0051] Specifically include the following steps:

[0052] Step 1. Feeding: Ethylene oxide, ethylene carbonate solution, catalyst and auxiliary agent enter the first bubble column 5 from the mixed liquid feed port 21 through the mixed liquid delivery pipe 13, and carbon dioxide is filled into the buffer through the carbon dioxide delivery pipe 14 After the tank 3, after being heated by the preheater 6, the gas distribution head 23 at the upper end of the intake pipe 22 enters the first bubble tower 5, and the esterification reaction with ethylene oxide generates ethyl carbonate crude product liquid; The ethylene carbonate crude product liquid enters the first bubble column 6 after being discharged from the bottom of the first bubble column 5, and carries out esterification reaction again wit...

Embodiment 3

[0065] This embodiment provides the production equipment system of Embodiment 1 to produce ethylene carbonate. The structural data of the first bubble column and the second bubble column used in this example are shown in Table 1.1.

[0066] Table 1.1 Bubble column structure

[0067]

[0068] The operating pressure (absolute pressure) of the first bubble column and the second bubble column is both 2.5MPa, and the reaction temperature is 120°C. Ethylene oxide is with the feed rate of 315.7kg / h, reclaims ethylene carbonate (containing catalyst tetraethylammonium bromide) with the feed rate of 121.2kg / h and replenishes ethylene carbonate (containing fresh catalyst 1.13kg / h and auxiliary agent zinc bromide 4.7kg / h) with the feeding speed of 11.1kg / h, pass through mixer and mix through respective circuit, feed from the mixed liquid feed inlet of the first bubble column, the first bubble column The reaction liquid is fed from the mixed liquid feed port of the second bubble colum...

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Abstract

The invention discloses an ethylene carbonate production equipment system and a production method thereof, and aims to achieve high conversion rates of raw materials and ensure the selectivity and thepurity of products. The production equipment system comprises a gas dryer, a compressor, a buffer tank, a first condenser, a first bubbling tower, a preheater, a gas stripping tower, an ethylene carbonate refining unit, an ethylene carbonate recycling tower, a mixed liquid conveying tube and a carbon dioxide conveying tube. The production method comprises the following steps: performing an esterification reaction on ethylene oxide and carbon dioxide in a single-stage or multi-stage bubbling tower, performing carbon dioxide gas stripping on the generated crude product of ethylene carbonate, feeding the crude product into the ethylene carbonate refining unit, and performing refining, so as to obtain high-purity ethylene carbonate. By adopting the system, the comprehensive conversion rate ofthe ethylene oxide is greater than 99.5%, the yield of the ethylene carbonate is 98-99.6%, and the selectivity is not smaller than 99%.

Description

technical field [0001] The invention relates to a synthesis process of chemical products, in particular to a ethylene carbonate production equipment system and a production method thereof. Background technique [0002] Ethylene carbonate (EC) is an organic chemical raw material with excellent performance and has a very wide range of functions. ①In the chemical industry, EC is the main raw material for the production of dimethyl carbonate by transesterification, the raw material for the synthesis of furazolidone, water glass slurry, fiber finishing agent, and the active intermediate for the production of lubricating oil and grease. A good solvent for nitrile and polyvinyl chloride; it can be used as a spinning solution for textiles, or directly as a solvent for removing acid gases and as an additive for concrete, as well as a plastic foaming agent and a stabilizer for synthetic lubricating oil. ② In the pharmaceutical industry, EC can be used as pharmaceutical components and...

Claims

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Application Information

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IPC IPC(8): C07D317/38
CPCC07D317/38Y02P20/584
Inventor 李博程牧曦韩伟郑敏周飞王华梁衡
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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