Pitch control method
AssigneeNalco Chemical Company
InventorJames H. Payton
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Abstract
Pitch formation in paper mill pulp systems may be inhibited by treating such systems, at a point prior to where pitch deposits normally occur, with at least 0.5 ppm, based on the weight of the pulp, of a composition comprising: ______________________________________ Ingredients % by weight ______________________________________ Non-ionic surfactant 50-20 Anionic dispersant 45-15 Anionic Polymer having molecular weight less than 100,000 45-15 ______________________________________
Claims3
A method of inhibiting pitch formation in paper mill pulp systems which comprises adding to such systems, at a point prior to where pitch deposits normally occur, at least 0.5 ppm, based on the weight of the pulp, of a composition comprising:
- ______________________________________ Ingredients % by weight ______________________________________ A. Non-ionic surfactant 50-20 B. Anionic Dispersant 45-15 C. Anionic Polymer having molecular weight less than 100,000 45-15 ______________________________________
A method of inhibiting pitch formation in paper mill pulp systems which comprises adding to such systems, at a point prior to where pitch deposits normally occur, at least 0.5 ppm, based on the weight of the pulp, of a composition comprising:
- ______________________________________ Ingredients % by weight ______________________________________ A. Non-ionic surfactant 50- 30 B. Anionic Dispersant 40- 20 C. Anionic Polymer having molecular weight less than 100,000 40- 20 ______________________________________
A method of inhibiting pitch formation in paper mill pulp systems which comprises adding to such systems, at a point prior to where pitch deposits normally occur, at least 0.5 ppm, based on the weight of the pulp, of a composition comprising:
- ______________________________________ Ingredients % by weight ______________________________________ A. An ethoxylated phenol 50- 30 B. Alkyl substituted naphthalene sulfonate 40- 20 C. Acrylic acid co-polymer having a molecular weight between 5,000 and 40,000 40- 20 ______________________________________
Dependencies are inferred from the claim text.