Additive and process for sticky control in recycled pulps

Abstract

The present invention describes an additive which controls stickies formation and removes anionic trash from recycled old corrugated container furnish, old newsprint furnish, deinked pulp furnish, old magazine grade furnish, coated broke furnish, or thermomechanical pulp furnish. The present invention treats talc with either a tertiary or quaternary amine. The treated talc is then added to the pulp slurry and removes stickies by binding the stickies to the talc and neutralizes the anionic trash that may be present. The present invention also describes a method for modifying talc particles involving contacting a tertiary or quaternary amine with talc particles. The present invention further describes a talc created by the process of contacting a tertiary or quaternary amine with talc particles. The present invention additionally describes a paper product having a modified talc filler wherein the modified talc filler has been contacted with a tertiary or quaternary amine.

1 . A method for modifying talc particles, comprising contacting a tertiary or quaternary amine with talc particles.  
   
   
       2 . The method for modifying talc according to  claim 1  wherein an amount of the tertiary or quaternary amine to be contacted with the talc is sufficient to attain a 15 μeq/g talc particle charge.  
   
   
       3 . The method for modifying talc according to  claim 1  wherein the tertiary amine is polyethyleneimine.  
   
   
       4 . The method for modifying talc according to  claim 1  wherein the quaternary amine is selected from the group consisting of polyamine and polydadmac.  
   
   
       5 . The method for modifying talc according to  claim 1  wherein the quaternary amine is polyamine.  
   
   
       6 . The method for modifying talc according to  claim 1  wherein the tertiary or quaternary amine is added to the talc in an amount ranging from about 0.1 pounds of amine per ton of talc to about 1.5 pounds of amine per ton of talc.  
   
   
       7 . The method for modifying talc according to  claim 1  wherein the tertiary or quaternary amine is added to the talc in an amount ranging from about 0.3 pounds of amine per ton of talc to about 1.2 pounds of amine per ton of talc.  
   
   
       8 . A talc created by the process described in  claim 1 .  
   
   
       9 . The method for modifying talc wherein the talc of  claim 8  is added to a pulp in an amount ranging from about 5 pounds per ton of dry old corrugated container (OCC) fibers to about 30 pounds per ton of dry OCC fibers.  
   
   
       10 . The method for modifying talc wherein the talc of  claim 8  is added to a pulp in an amount ranging from about 10 pounds per ton of dry old corrugated container (OCC) fibers to about 20 pounds per ton of dry OCC fibers.  
   
   
       11 . A method for improving the efficiency of talc in reducing deposits on paper making equipment, comprising the steps of: 
 a) contacting a cationic polymer with talc to form a modified talc;    b) adding the modified talc to a pulp furnish.    
   
   
       12 . The method for modifying talc according to  claim 11  wherein the cationic polymer is a tertiary or quaternary amine.  
   
   
       13 . The method for modifying talc according to  claim 13  wherein the tertiary amine is polyethyleneimine.  
   
   
       14 . The method for modifying talc according to  claim 13  wherein the quaternary amine is selected from the group consisting of polyamine and polydadmac.  
   
   
       15 . The method for modifying talc according to  claim 13  wherein the quaternary amine is polyamine.  
   
   
       16 . The method for modifying talc according to  claim 13  wherein the tertiary or quaternary amine is added in an amount sufficient to attain a talc particle charge of about 15 μeq/g.  
   
   
       17 . The method for modifying talc according to  claim 13  wherein the tertiary or quaternary amine is added to the talc in an amount ranging from about 0.1 pounds of amine per ton of talc to about 1.5 pounds of amine per ton of talc.  
   
   
       18 . The method for modifying talc according to  claim 13  wherein the tertiary or quaternary amine is added to the talc in an amount ranging from about 0.3 pounds of amine per ton of talc to about 1.2 pounds of amine per ton of talc.  
   
   
       19 . A talc created by the process described in  claim 13 .  
   
   
       20 . The method for modifying talc wherein the talc of  claim 19  is added to a pulp in an amount ranging from about 5 pounds per ton of dry old corrugated container (OCC) fibers to about 30 pounds per dry OCC fibers.  
   
   
       21 . The method for modifying talc wherein the talc of  claim 19  is added to a pulp in an amount ranging from about 10 pounds per ton of dry old corrugated container (OCC) fibers to about 20 pounds per dry OCC fibers.  
   
   
       22 . A paper product having a modified talc filler wherein the modified talc filler has been contacted with a tertiary or quaternary amine.  
   
   
       23 . A method for improving sheet porosity in paperboard, comprising: 
 c) contacting a cationic polymer with talc to form a modified talc;    d) adding the modified talc to a paperboard pulp furnish; and,    e) processing the paperboard pulp furnish to create paperboard.    
   
   
       24 . The method of  claim 23  wherein the cationic polymer is a tertiary or quaternary amine.  
   
   
       25 . The method of  claim 23  wherein the cationic polymer is added in an amount sufficient to attain a talc particle charge of about 15 μeq/g.  
   
   
       26 . A process for manufacturing a modified talc filler comprising: 
 contacting a cationic polymer with talc powder to form a mixture; and, drying said mixture.    
   
   
       27 . The process of  claim 26  further comprising pelletizing the mixture of cationic polymer and talc powder.  
   
   
       28 . The process of  claim 26  wherein the cationic polymer is added in an amount sufficient to attain a talc particle charge of about 15 μeq/g.  
   
   
       29 . The process of  claim 26  wherein the cationic polymer is a tertiary or quaternary amine.  
   
   
       30 . A process for manufacturing a modified talc filler comprising: 
 a) drying talc;    b) contacting a liquid cationic polymer with the dried talc; and,    c) mixing said cationic polymer and dried talc.    
   
   
       31 . The process of  claim 30  wherein the talc was pelletized before drying.  
   
   
       32 . The process of  claim 30  wherein the cationic polymer is a tertiary or quaternary amine.  
   
   
       33 . The process of  claim 30  wherein the mixing of the cationic polymer and dried talc occurs in a single stage mixer.  
   
   
       34 . The process of  claim 30  wherein the mixing of the cationic polymer and dried talc occurs in a multiple stage mixer.