Method of bleaching cellulosic materials with hydrogen peroxide
First Claim
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1. A METHOD OF BLEACHING CELLULOSIC MATERIAL WHICH COMPRISES CONTACTING SAID MATERIAL WITH AQUEOUS HYDROGEN PEROXIDE SOLUTION TO PROVIDE BLEACHED MATERIAL IN CONTACT WITH RESIDUAL HYDROGEN PEROXIDE AND THEREAFTER TREATING SUCH BLEACHED MATERIAL STILL IN CONTACT WITH RESIDUAL HYDROGEN PEROXIDE WITH ANHYDRIDE OF 2 TO 8 CARBON CARBOXYLIC ACID.
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1 Claim
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1. A METHOD OF BLEACHING CELLULOSIC MATERIAL WHICH COMPRISES CONTACTING SAID MATERIAL WITH AQUEOUS HYDROGEN PEROXIDE SOLUTION TO PROVIDE BLEACHED MATERIAL IN CONTACT WITH RESIDUAL HYDROGEN PEROXIDE AND THEREAFTER TREATING SUCH BLEACHED MATERIAL STILL IN CONTACT WITH RESIDUAL HYDROGEN PEROXIDE WITH ANHYDRIDE OF 2 TO 8 CARBON CARBOXYLIC ACID.
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Current AssigneeGarry L. Burroway, Walter F. Parker
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Original AssigneeGarry L. Burroway, Walter F. Parker
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InventorsParker, Walter F., Burroway, Garry L.
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Application NumberUS04/210,193Time in Patent Office1,086 DaysField of SearchUS Class Current162/76CPC Class CodesD06L 4/12 combined with specific addi...D21C 9/1036 Use of compounds accelerati...
