Bleaching pulp with chloric acid
AssigneePulp and Paper Research Institute of Canada
InventorsRichard M. Berry, Michael Paleologou, Norman Liebergott
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Abstract
A process for bleaching pulp which employs chloric acid as the oxidizing agent, in the absence of a transition metal catalyst.
Claims8
A process for bleaching pulp which comprises employing as the sole oxidizing agent chloric acid generated separately from the pulp slurry and thereafter added thereto, at a charge concentration on pulp amount of about 70% to 100% based on o.d. pulp, and wherein the chloric acid is produced at a charge concentration of about 10% to about 40% generated by reaction of a metal chlorate salt with from about 5% to about 15% chemical equivalent of a strong mineral acid, in the absence of a transition metal or heavy metal catalyst, and recovering and recycling residual unreacted chloric acid.
Dependencies are inferred from the claim text.