Extraction and separation method

Patent metadata

Field	Value
Publication number	US-2016250565-A1
Application number	US-201415029122-A
Country	US
Kind code	A1
Filing date	Oct 22, 2014
Priority date	Nov 21, 2013
Publication date	Sep 1, 2016
Grant date	—

Abstract

An extraction and separation method separating a specific component from a raw material fluid using an extraction device including plural stages of extraction units connected sequentially. The extraction and separation method includes: extracting the specific component into an extraction solvent having a difference in specific gravity with respect to that raw material fluid from the raw material fluid while causing the raw material fluid and the extraction solvent to flow in a state of contact with each other in the extraction units for each stage; introducing at least part of the fluid discharged from an extraction unit to the next stage extraction unit in a state wherein the raw material fluid and the extraction solvent are mixed; and a final separation separating the raw material fluid, after the specific component has been extracted in the fluid discharged from the extraction unit in a final stage, and the extraction solvent that has extracted the specific component.

First claim

1 . An extraction and separation method for extracting and separating a specific component from a raw material fluid, comprising:
an extraction and separation step of extracting and separating the specific component from the raw material fluid, using an extraction device including a plurality of stages of extraction sections sequentially connected to one another, wherein the extraction and separation step includes: an extraction step of extracting the specific component from the raw material fluid to an extracting agent while the raw material fluid and the extracting agent having a specific gravity difference relative to the raw material fluid are allowed to flow in the extraction section at each stage while being in contact with each other; a feeding step of feeding at least a part of the fluid discharged from the extraction sections into the subsequent extraction sections while the raw material fluid and the extracting agent are mixed with each other; and a final separation step of separating the fluid discharged from the extraction section at a final stage into the raw material fluid from which the specific component has been extracted and the extracting agent that has extracted the specific component.

2 . The extraction and separation method according to claim 1 ,
wherein, in the extraction and separation step, the extraction device in which the extraction section at each stage includes an extraction flow passage through which the fluid that has been fed into the identical extraction section is allowed to flow, and each extraction section other than at least the extraction section at the final stage includes a discharge portion connected to an outlet port of the extraction flow passage is used, and the feeding step includes an each stage separation step of separating, in each extraction section other than the extraction section at the final stage, the fluid discharged from the extraction flow passage to the discharge portion into a first fluid and a second fluid due to a specific gravity difference and performing separation such that the first fluid contains the raw material fluid and the extracting agent, and a separated fluid feeding step of feeding the first fluid separated in the discharge portion in the each stage separation step into the extraction flow passage of the subsequent extraction sections.

3 . The extraction and separation method according to claim 2 , wherein a rate of the extracting agent in the first fluid separated in the each stage separation step is lower than a rate of the raw material fluid in the first fluid.

4 . The extraction and separation method according to claim 2 ,
wherein the discharge portion is a discharge header connected to the outlet port of the extraction flow passage, and in the each stage separation step, the fluid discharged from the extraction section to an interior space of the discharge header is separated in the interior space due to a specific gravity difference into the first fluid and the second fluid.

5 . The extraction and separation method according to claim 2 ,
wherein the discharge portion includes a discharge header connected to the outlet port of the extraction flow passage and a fluid separation bath, and in the each stage separation step, the fluid discharged from the extraction flow passage to the discharge header is fed into an interior space of the fluid separation bath and separated in the interior space of the fluid separation bath due to a specific gravity difference into the first fluid and the second fluid.

6 . The extraction and separation method according to claim 2 ,
wherein, in the each stage separation step, a predetermined volume of the extracting agent out of the fluid discharged to the discharge portion is separated as the second fluid in each extraction section, and the extraction and separation step includes an extracting agent supply step of supplying the second fluid separated in the discharge portion in the each stage separation step to the extraction flow passage of the subsequent extraction sections.

7 . The extraction and separation method according to claim 2 ,
wherein, in the each stage separation step, a predetermined volume of the extracting agent out of the fluid discharged to the discharge portion is separated as the second fluid in each extraction section, and the extraction and separation step includes an extracting agent supply step of supplying the second fluid separated in the discharge portion in the each stage separation step to the extraction flow passage of the precedent extraction sections.

8 . The extraction and separation method according to claim 2 ,
wherein, in the extraction and separation step, the extraction device in which the extraction section at each stage includes a plurality of layers that are stacked one upon another and a plurality of microchannels each forming the extraction flow passage are arranged in each layer is used, and in the extraction step, the specific component is extracted from the raw material fluid to the extracting agent through each microchannel included in the extraction section at each stage.

9 . The extraction and separation method according to claim 1 ,
wherein, in the extraction step, a time in which the raw material fluid and the extracting agent are allowed to be in contact with each other in the extraction section at each stage is set to be shorter than a time required from when the extracting agent is brought into contact with the raw material fluid to when extraction of the specific component from the raw material fluid to the extracting agent reaches an equilibrium state.

10 . The extraction and separation method according to claim 1 ,
wherein, to the extraction device used in the extraction and separation step, a settler connected to the extraction section at the final stage is attached, and in the final separation step, the fluid discharged from the extraction section at the final stage is fed into an interior space of the settler and allowed to remain in the interior space, whereby the fluid is separated into the raw material fluid from which the specific component has been extracted and the extracting agent that has extracted the specific component.

Assignees

• Kobe Steel Ltd

Inventors

• Noishiki Koji
• Matsuoka Akira
• Kurishiro Yuji

Classifications

• B01D11/0446

  Juxtaposition of mixers-settlers · CPC title

• B01J19/00

  Chemical, physical or physico-chemical processes in general; Their relevant apparatus · CPC title

• B01D2011/005

  Co-current extraction · CPC title

• B01D11/0496

  by extraction in microfluidic devices · CPC title

• B01D11/04

  of solutions which are liquid · CPC title