Lignin sulfonic acid

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→ see also: Ligninsulphonate Ligninsulphonic
acid is the chemically not exactly defined reaction product of lignin with sulphurous acid . Calcium salts of lignosulfonic acid produced during digestion of wood with calcium bisulfite solutions in the production of pulp .

Individual evidence

  1. ^ Brockhaus ABC Chemie in two volumes, VEB FA Brockhaus Verlag Leipzig, 1965, page 799.