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Title: Deionization and desalination using electrostatic ion pumping

Abstract

The present invention provides a new method and apparatus/system for purifying ionic solutions, such as, for example, desalinating water, using engineered charged surfaces to sorb ions from such solutions. Surface charge is applied externally, and is synchronized with oscillatory fluid movements between substantially parallel charged plates. Ions are held in place during fluid movement in one direction (because they are held in the electrical double layer), and released for transport during fluid movement in the opposite direction by removing the applied electric field. In this way the ions, such as salt, are "ratcheted" across the charged surface from the feed side to the concentrate side. The process itself is very simple and involves only pumps, charged surfaces, and manifolds for fluid collection.

Inventors:
 [1];  [1];  [1];  [2];  [3];  [4]
  1. Livermore, CA
  2. Pleasanton, CA
  3. San Ramon, CA
  4. Edina, MN
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1019422
Patent Number(s):
7981268
Application Number:
US Patent Application 11/655,423
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA)
Patent Classifications (CPCs):
C - CHEMISTRY C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE C02F - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Bourcier, William L, Aines, Roger D, Haslam, Jeffery J, Schaldach, Charlene M, O'Brien, Kevin C, and Cussler, Edward. Deionization and desalination using electrostatic ion pumping. United States: N. p., 2011. Web.
Bourcier, William L, Aines, Roger D, Haslam, Jeffery J, Schaldach, Charlene M, O'Brien, Kevin C, & Cussler, Edward. Deionization and desalination using electrostatic ion pumping. United States.
Bourcier, William L, Aines, Roger D, Haslam, Jeffery J, Schaldach, Charlene M, O'Brien, Kevin C, and Cussler, Edward. Tue . "Deionization and desalination using electrostatic ion pumping". United States. https://www.osti.gov/servlets/purl/1019422.
@article{osti_1019422,
title = {Deionization and desalination using electrostatic ion pumping},
author = {Bourcier, William L and Aines, Roger D and Haslam, Jeffery J and Schaldach, Charlene M and O'Brien, Kevin C and Cussler, Edward},
abstractNote = {The present invention provides a new method and apparatus/system for purifying ionic solutions, such as, for example, desalinating water, using engineered charged surfaces to sorb ions from such solutions. Surface charge is applied externally, and is synchronized with oscillatory fluid movements between substantially parallel charged plates. Ions are held in place during fluid movement in one direction (because they are held in the electrical double layer), and released for transport during fluid movement in the opposite direction by removing the applied electric field. In this way the ions, such as salt, are "ratcheted" across the charged surface from the feed side to the concentrate side. The process itself is very simple and involves only pumps, charged surfaces, and manifolds for fluid collection.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {7}
}

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