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US 10,865,519 B2Granted
Modified cellulose from chemical fiber and methods of making and using the same
AssigneeGP Cellulose GmbH
InventorsArthur J. Nonni, Charles E. Courchene
Life of this patent
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Abstract
This disclosure relates to improved products containing oxidized cellulose. This disclosure further relates to improved methods of making oxidized cellulose in multi-stage bleaching processes, including, for example, in four-stage and three-stage bleaching processes. This disclosure further relates to products made therefrom, including wipe, tissue, towel, and napkin products.
Claims21
A method of making an oxidized cellulose comprising:
- bleaching a cellulosic pulp using a bleaching process consisting of four bleaching stages, wherein at least one stage of the four-stage bleaching process is an oxidizing (OX) stage comprising oxidizing the pulp with at least one peroxide and at least one catalyst under acidic conditions;
- and
- wherein the four-stage bleaching process is a sequence chosen from one of D0E(OX)D1, D0ED1(OX), D0(OX)D1(OX), or D0(OX)D1D2.
A method of making an oxidized cellulose comprising:
- bleaching a cellulosic pulp using a bleaching process consisting of three bleaching stages, wherein at least one stage of the three-stage bleaching process is an oxidizing (OX) stage comprising oxidizing the pulp with at least one peroxide and at least one catalyst under acidic conditions, and
- wherein the three-stage bleaching process is a sequence chosen from one of D0(OX)D1, DE(OX), or D(OX)E.
Dependencies are inferred from the claim text.