[12] Patent
[11] Patent No.:GC0009238  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2018                56/2018  
Number of the Decision to Grant the Patent:2018/140693
Date of the Decision to Grant the Patent:02/Dec/2018

[21] Application No.:GC 2011-31385

[22] Filing Date:30/7/2011

[30] Priority:

[33] State [32] Priority date [31] Priority No.
US
9/8/2010
12/852,910

[72] Inventors:1- WANG, Jing،2- BODE, Heinrich E،3- LI, Xiaojin Harry

[73] Owner: Nalco Company, 1601 W. Diehl Road, Naperville, Illinois, 60563-1198, USA

[74] Agent: Saba & Co. T.M.P

  

 

  

[51]IPC:
Int. Cl.: B01D21/01; C01F7/06; C01F7/47 (2006.01)

[56] Cited Documents:

-US 2008257827 A1 (DAI QI [US]; SPITZER DONALD PAUL [US]; HEITNER HOWARD I [US]; CHEN H-L TONY [US] + ) 23 October 2008
-Patil, Sachin, Crosslinking of Polysaccharides: Methods and Applications
 
Examiner: Rami Al-Ghamdi

[54] THE RECOVERY OF ALUMINA TRIHYDRATE DURING THE BAYER PROCESS USING CROSS-LINKED POLYSACCHARIDES
[57] Abstract: The invention provides methods and compositions for improving the production of alumina hydrate. The invention involves adding one or more polysaccharides to liquor or slurry in the fluid circuit of the production process. The one or more polysaccharides can be a cross-linked polysaccharide (such as cross-linked dextran or cross-linked dihydroxypropyl cellulose). The various polysaccharides can impart a number of advantages including at least some of: greater flocculation effectiveness, increasing the maximum effective dosage, faster settling rate. The production process can be a Bayer process.
No. of claims: 6


 

Note: Any interested individual may, within 3 months of publication of the grant, file objection thereof with the Grievance Committee after payment of grievance fees.