Pulping and Bleaching PSE 476/Chem E 471. Lecture #19 Oxygen Bleaching and NaOH extraction. Agenda. Process Overview Advantages/Disadvantages Reduction of Oxygen: Oxygen species Lignin Reactions Carbohydrate Reactions Effect of Process Variables NaOH extraction.
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Oxygen Bleaching and NaOH extraction
Side Chain Cleavage
Purpose: to dissolve and then to remove compounds made alkali soluble in the proceeding acid delignification.
Lignin (2 functions)