Wood pulp bleaching composition containing sodium hydrosulfite and hexamethylenetetramine
AssigneeVentron Corporation
InventorEdward A. Sullivan
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Abstract
An aqueous composition for bleaching wood pulp containing sodium hydrosulfite, and at least 2 weight percent hexamethylenetetramine based upon the weight of sodium hydrosulfite, wherein the solution has a pH between about 4 and about 11. The hexamethylenetetramine prevents hydrogen sulfide formation during bleaching of the wood pulp.
Claims8
A wood pulp bleaching composition which comprises an aqueous solution for sodium hydrosulfite, and at least 2 weight percent hexamethylenetetramine based upon the weight of sodium hydrosulfite, said solution having a pH between about 5.0 and about 11.0 and said weight percent of hexamethylenetetramine being effective to prevent formation of hydrogen sulfide during sodium hydrosulfite bleaching of wood pulp.
Dependencies are inferred from the claim text.