Maro Publications

Extraction

Notes

Patent Abstracts

Patent Titles

*8/19/2013 
from 8/19/2013

Maro Encyclopedia

Separations

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Notes

“Extraction in chemistry is a separation process consisting in the separation of a substance from a matrix. It may refer to Liquid-liquid extraction, and Solid phase extraction.

 Other techniques include Supercritical carbon dioxide extraction, ultrasonic extraction, heat reflux extraction, microwave-assisted extraction, DIC (instant controlled pressure drop).

 Extractions use two immiscible phases to separate a solute from one phase into the other. The distribution of a solute between two phases is an equilibrium condition described by partition theory. Boiling tea leaves in water extracts the tannins, theobromine, and caffeine out of the leaves and into the water. More typical lab extractions are of organic compounds out of an aqueous phase and into an organic phase.

 Common extractants are arranged from ethyl acetate to water (ethyl acetate < acetone < ethanol < methanol < acetone:water (7:3) < ethanol:water (8:2) < methanol:water (8:2) < water) in increasing order of polarity according to the Hildebrand solubility parameter.

 The extract can be put back to dried form using a centrifugal evaporator or a freeze-drier.

(Extractions, Wikipedia, 8/19/2013)

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Patent Abstracts

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Patent Titles

5/28/2013

2. 8,449,858 
Continuous extraction technique for the purification of carbon nanomaterials 
4/23/2013

1. 8,426,553 
Method for removing diluent from a polymer extrudate, and its applications 

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Interested!!
Bookmark this page to follow future developments!.
(RDC 7/16/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921
E-Mail: cornelrd@bee.net  

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Copyright 2013 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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* Date of latest addition; date of first entry is 8/19/2013.