Method and equipment for refining high-purity diethyl carbonate

A technology of diethyl carbonate and a refining method is applied in the refining field of high-purity diethyl carbonate to achieve the effects of high yield, low energy consumption, safe and environmentally friendly operation

Active Publication Date: 2012-07-04
TONGLING JINTAI CHEM INDAL
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  • Abstract
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  • Claims
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Problems solved by technology

Because the development of the battery electrolyte industry puts forward higher requirements on the quality of diethyl carbonate, there is an urgent need for diethyl carbonate with a purity of 99.99%. few

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  • Method and equipment for refining high-purity diethyl carbonate
  • Method and equipment for refining high-purity diethyl carbonate

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Embodiment Construction

[0014] In this specific embodiment, the feed inlet of the raw material is selected on the horizontal kettle 2, and the packing layer 7 is divided into seven sections, and the height of each section of packing is 3 meters. Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0015] Step 1, feeding and steaming operation: Continuously inject industrial-grade diethyl carbonate with a purity of 99.5% into the horizontal kettle 2 with a material pump, and adjust the feeding port when the liquid level gauge 4 of the horizontal kettle 2 shows 60cm The flow rate of 1 is 200-250kg / h. At this time, open the steam valve of the built-in U-shaped tube bundle heat exchanger 3, add steam, control the steam pressure to 0.4Mpa, and the steam flow rate to 0.2t / h to maintain total reflux in the tower And maintain the pressure inside the tower as normal pressure. Concrete method is to open the vent of secondary condensatio...

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Abstract

The invention discloses a method and equipment for refining high-purity diethyl carbonate, and aims to provide a method and equipment for preparing high-purity diethyl carbonate, which is characterized by single-tower continuous operation, simple separation method, high yield, safe and environment-friendly operation, low energy consumption and use of diethyl carbonate with purity of 99.5 percent as a raw material. The refining method disclosed by the invention comprises three steps: feeding and steam charging operation, light component collection operation, and side withdrawal process regulation and product collection. The rectification column of the refining equipment comprises a built-in regular stainless steel wire gauze corrugated packing and an overhead built-in condenser.

Description

technical field [0001] The present invention relates to a kind of refining method, particularly a kind of refining of high-purity diethyl carbonate [0002] Methods and equipment. Background technique [0003] Diethyl carbonate (English name Diethyl Carbonate, referred to as DEC), the molecular formula is C 5 h 10 o 3 , the molecular weight is 118.13, the melting point is -43°C, the boiling point is 126.8°C, the relative density is 0.975 (20 / 4°C), the refractive index is 1.3846, and the flash point (closed cup) is 32.8°C. It is a colorless transparent liquid with a slight pungent odor. Insoluble in water, soluble in alcohol, ether and other organic solvents, flammable, easy to form explosive mixture with air. It is an important organic chemical raw material, mainly used as a solvent and for organic synthesis. High-purity diethyl carbonate is often used to make lithium battery electrolyte solvents, and in medicine as the basic agent component of pine oil ointment, s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/96C07C68/08B01D3/14
Inventor 吴实徐利林殷芳喜王桂珍陈永礼余海
Owner TONGLING JINTAI CHEM INDAL
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