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US 11,447,914 B2Granted
Removal of stickies in the recycling of paper and paperboard
OwnerCesar I. Basilio, Steven W. Sheppardinventors
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Abstract
Removal of stickies from waste paper and paperboard is obtained with the use of a modified kaolin-based stickies removal composition. The modified kaolin-based stickies removal composition is produced by modifying the kaolin clay, separating the modified kaolin clay from the non-reactive kaolin clay, and then adding a nonionic surfactant to the modified kaolin-based particles. Removal of stickies is improved by the use of this modified kaolin-based stickies removal composition during the recycling of the waste paper and paperboard.
Claims9
A method of removing stickies particles from waste paperboard, the method comprising:
- forming a pulp of waste paperboard product;
- adding a composition comprising a nonionic surfactant and a modified kaolin-based stickies removal component to said pulp to form a mixture;
- and
- subjecting said mixture to a stickies removal operation, wherein said stickies removal operation is selected from the group comprising centrifugation or screening;
- wherein said nonionic surfactant is selected from a group comprising polyethylene glycol esters, polypropylene glycol esters or blends thereof.
2 more elements
Dependencies are inferred from the claim text.