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System and method for organic solvent purification

一种有机溶剂、渗透气化的技术，应用在化学仪器和方法、有机化学、分离方法等方向，能够解决离子交换树脂大量工夫、离子交换效率小等问题，达到热回收效率高的效果

Active Publication Date: 2016-11-16
ORGANO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is also the problem that the ion exchange device 17 must remove ions from NMP as a non-aqueous solvent, so the ion exchange efficiency is low, and the exchange of the ion exchange resin requires a lot of work.

Method used

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  • System and method for organic solvent purification
  • System and method for organic solvent purification

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Embodiment Construction

[0027] Next, preferred embodiments of the present invention will be described with reference to the drawings. image 3 The basic scheme of the organic solvent purification system based on this invention is shown as the organic solvent purification system which is one of the embodiment of this invention. This organic solvent purification system is a system for separating and purifying an organic solvent from a mixed solution of an organic solvent and water, for example, it is for recovering NMP (N-methyl-2 -pyrrolidone) and water mixture, and the system used to separate and purify NMP from the mixture. Hereinafter, the case of using NMP as an organic solvent will be described, but the applicable organic solvent of the present invention is not limited to NMP, generally speaking, for the boiling point at atmospheric pressure (0.1013Mpa) is higher than the boiling point of water (100 ° C), preferably Organic solvents whose boiling point under atmospheric pressure is 120° C. or hi...

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Abstract

The invention discloses a system and method for organic solvent purification. According to the invention, an organic solvent purification system for separating an organic solvent, which has a boiling point exceeding 100 DEG C at 1 atmosphere, such as N-methyl-2-pyrrolidone (NMP), from a liquid mixture comprising the organic solvent and water and purifying the organic solvent, said system comprising: a heater heating the liquid mixture; a pervaporation device separating the organic solvent from water, said pervaporation device being provided with a pervaporation membrane and disposed in the post stage of the heater; a vacuum evaporation can to which the organic solvent collected from the concentration side of the pervaporation device is supplied; and a piping supplying the organic solvent, which has been vaporized in the vacuum evaporation can, to the heater as a heat source thereof. The heater heats the liquid mixture using the condensation heat of the organic solvent having been vaporized in the vacuum evaporation can (33).

Description

technical field [0001] The present invention relates to a system and method for separating and purifying an organic solvent from a mixture of an organic solvent represented by N-methyl-2-pyrrolidone (hereinafter also referred to as NMP) and water, and particularly relates to the use of a pervaporation method Organic solvent purification system and method. Background technique [0002] Among organic solvents there are substances that have a high solubility in water. When such a water-soluble organic solvent is recovered and reused, a mixed solution of the organic solvent and water is often recovered, and therefore, the organic solvent to be reused must be separated and purified from the mixed solution. The recovered mixed solution may contain impurities such as ionic substances and fine particles in addition to the organic solvent and water. In addition, the mixed solution also contains dissolved gases such as dissolved oxygen and dissolved carbon dioxide depending on the u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/36B01D61/58B01J47/02C02F1/44
CPCB01J47/02B01D61/36B01D61/58C02F1/44B01D15/363C07D207/267Y02P20/50B01D61/362C02F1/20C02F1/448B01D2311/02B01D2311/06C02F2001/422C02F2103/34B01D61/3621B01D3/10B01D19/0031
Inventor 寺师亮辅
Owner ORGANO CORP
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