US2006191853A1PendingUtilityA1

Water-in-oil-in-water emulsions of hydroxamated polymers and methods for using the same

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Individually held — no corporate assignee on recordPriority: Feb 25, 2005Filed: Feb 24, 2006Published: Aug 31, 2006
Est. expiryFeb 25, 2025(expired)· nominal 20-yr term from priority
Inventors:Franklyn A. BallentineMorris E. Lewellyn
B01D 21/01C02F 2103/28C01F 7/148C02F 1/56Y02P10/20C22B 21/0015C02F 2101/20C01F 7/0653C22B 3/20C02F 2103/16
41
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Claims

Abstract

A method and composition for flocculation and separation of suspended solids from an industrial process stream containing suspended solids is provided. The method includes the steps of adding to the stream a water-in-oil-in-water emulsion polymer in an amount effective to flocculate the suspended solids and separating the flocculated solids therefrom. The composition is a water-in-oil-in-water emulsion of a water-soluble polymer in which the continuous phase is an aqueous solution of a water-soluble salt.

Claims

exact text as granted — not AI-modified
1 . A method for flocculation and separation of suspended solids from an industrial process stream containing suspended solids comprising the steps of: 
 adding to the stream a water-soluble polymer in an amount effective to flocculate the suspended solids;    and separating the flocculated solids therefrom, wherein the water-soluble polymer is a water-in-oil-in-water emulsion polymer.    
   
   
       2 . A method as in  claim 1  wherein the process stream is a Bayer process stream.  
   
   
       3 . A method as in  claim 2  wherein the polymer is a hydroxamated water-in-oil-in-water emulsion polymer.  
   
   
       4 . A method of  claim 2  in which the process stream is alumina trihydrate process stream.  
   
   
       5 . A method of  claim 2  in which the process stream is red mud process stream.  
   
   
       6 . A method of  claim 3  in which the hydroxamated polymer is a polymer of acrylamide.  
   
   
       7 . A method of  claim 3  in which the continuous phase of the hydroxamated water-in-oil-in water emulsion polymer contains a water-soluble salt.  
   
   
       8 . A method of  claim 7  in which the continuous phase of the hydroxamated water-in-oil-in water emulsion polymer contains a water-soluble salt comprising of aluminum or calcium.  
   
   
       9 . A method of  claim 3  in which the process stream is alumina trihydrate process stream.  
   
   
       10 . A method of  claim 3  in which the process stream is red mud process stream.  
   
   
       11 . A method of  claim 2  in which the hydroxamated water-in-oil-in-water emulsion polymer is prepared by mixing in any order a hydroxamated water-in-oil emulsion polymer with a solution of a water-soluble salt comprising of aluminum or calcium.  
   
   
       12 . A method of  claim 1  wherein the water-soluble polymer is added to the process stream as a water-in-oil-in-water emulsion polymer.  
   
   
       13 . A method of  claim 12  in which the polymer is a hydroxamated water-in-oil-in-water emulsion polymer.  
   
   
       14 . A method of  claim 13  in which the hydroxamated polymer is a polymer of acrylamide.  
   
   
       15 . A method of  claim 14  wherein the process stream is a Bayer process stream.  
   
   
       16 . A method of  claim 15  in which the process stream is either a red mud or an alumina trihydrate process stream.  
   
   
       17 . A composition comprising a water-in-oil-in-water emulsion of a water-soluble polymer in which the continuous phase is an aqueous solution of a water-soluble salt.  
   
   
       18 . A composition according to  claim 17  in which the polymer comprises a hydroxamated polymer.  
   
   
       19 . A composition according to  claim 17  in which the continuous phase contains a water-soluble salt of aluminum or calcium.  
   
   
       20 . A composition according to  claim 18  in which the hydroxamated polymer is derived from an acrylamide or an acrylate ester.  
   
   
       21 . A composition according to  claim 17  in which the polymer is a polymer of acrylamide or an acrylate ester.  
   
   
       22 . A composition according to  claim 17  in which the salt is a water-soluble salt of aluminum or calcium.  
   
   
       23 . A composition according to  claim 17  in which the polymer is a hydroxamated polymer.  
   
   
       24 . A composition according to  claim 23  in which the continuous phase contains a water-soluble salt of aluminum or calcium.

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