Preparation of lignosulfonic acid salts by sulfite cooking of used non-condensing wood

This article is devoted to the production of lignosulfonic acid salts by sulfite cooking. Lignosulfonates are important organic compounds that have unique surface-active properties and are widely used in various industries. The article analyzes the main stages of the preparation and separation of lignosulfonates. The possibilities of the synthesis of lignosulfonic acid salts and the potential of their use as additives in water-soluble paints and varnishes are described. The positive effect of the lignosulfonate content on the change in the surface tension of water-acrylic dispersions is shown. Based on the obtained synthesis results, the yield of sodium lignosulfonate was calculated and a technical and economic calculation of the cost of producing 10 kg of the product was performed.