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A chemical pulp which contains reactants capable of generating dioxirane within the pulp is produced in a process which comprises mixing a pulp with reactants comprising a carbonyl compound, preferably acetone, and an oxygen donor, preferably monoperoxysulfate, in proportions which produce a water-soluble dioxirane having a molecular diameter of less than 140 angstrom units. Such a pulp bleaching process which employs dioxirane as a bleaching agent is rendered environmentally and economically acceptable by recycling the reactants employed to produce the dioxirane.
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University of Missouri System
Pulp and Paper Research Institute of Canada
Lee, Chung-Li; Murray, Robert W.; Hunt, Kenneth; Wearing, James T.; Hogikyan, Robert M.; Oloman, Colin W.; and Chen, Jianxin, "Bleaching of lignocellulosic material with in-situ-generated dioxirane" (1994). UMSL Patents. 1.