[12] Patent
[11] Patent No.:GC0007530  
[45] Date of Publishing the Grant of the Patent: 30/Apr /2018                48/2018  
Number of the Decision to Grant the Patent:2018/125722
Date of the Decision to Grant the Patent:05/Apr/2018

[21] Application No.:GCC/P/2009/14863

[22] Filing Date:8/12/2009

[30] Priority:

[33] State [32] Priority date [31] Priority No.
GB
8/12/2008
0822362.0

[72] Inventor: Peter Nicoll

[73] Owner: Surrey Aquatechnology Limited, Bramley House, The Guildway, Old Portsmouth Road, Guildford, Surrey, GU3 1LR, United Kingdom

[74] Agent: Saud M. A. Shawwaf Law Office

  

 

  

[51]IPC:
Int. Cl.: C02F1/44, B01D61/00, B01D61/58 (2006.01)

[56] Cited Documents:

-WO 2008/050087 A1 (SURREY AQUATECHNOLOGY LIMITED et al.) 02 May 2008  
Examiner: Nouf AlNassban

[54] IMPROVED SOLVENT REMOVAL
[57] Abstract: A process for removing a solvent from a source solution, said process comprisinga) contacting the source solution with one side of a selectively permeable membrane,b) contacting a draw solution having a higher osmotic pressure (higher solute concentration) than the source solution with the opposite side of the membrane, such that solvent from the source solution passes across the membrane to dilute the draw solution by direct osmosis,c) removing solvent from the diluted draw solution to regenerate the draw solution, andd) recycling the regenerated draw solution to step b), characterised in that a portion of the draw solution is discarded or treated before and/or after the draw solution is regenerated in step c) so as to reduce the concentration of any solute species present in the draw solution from the source solution.
No. of claims: 13     No. of figures: 2


 

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