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Sodium Lignosulfonate from Sulfite Pulp 2
Lignin content is usually 70%–75%, with the remaining mass being carbohydrate, ash, and inorganic salts. Further commercial and biorefinery utilization requires the removal of sulfur, which would add cost (PNNL, 2007). Lignosulfonates are obtained from sulfite pulping processes wherein cellulose is extracted from wood in the pulp industry. The so-called sulfite pulping process involves mixing sulfur dioxide (SO2) with…
