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Lesnoy Zhurnal

Sulphate Soap Demulsifying with Addition of Non-Ionic Surfactant

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O.S. Andranovich, E.Yu. Demiantseva, A.P. Filippov, R.A. Smit

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Biorefining based on comprehensive and advanced processing of wood raw materials with getting the products of a high added value and waste reduction is an innovative solution at the fast-growing market of the pulp and paper industry. Isolation of organic substances, which represent by-products in wood processing technology, from spent liquors is an urgent issue of biorefining. The current technology of sulphate soap extraction (which is a byproduct) from spent liquors is process complicated and energy-intensive. All this makes the sulphate soap extraction disadvantageous, despite the fact that the soap is a raw material for production of a wide range of products with a high added value: bioactive substances, tall oil, rosin, etc. This article presents the colloid-chemical properties of sulphate soap separated from black liquors of various wood species pulping. A method of sulfate soap extraction based on soap particles aggregation through addition of a demulsifier is proposed. It was found that with addition of non-ionic surfactant neonol AF 9-6 into the solution of sulphate soap, the molecularly dissolved part of the soap is significantly reduced, while the dispersed component of the presented system increases up to 98 %. As a result, deterioration of aggregative and sedimentation stability and, as a consequence, aggregation of soap particles are observed. A size quadruplication of soap particles was recorded with addition of demulsifier by the method of dynamic light scattering. This will allow to increase the sedimentation rate of sulfate soap in black liquor dozens of times and speed up its sedimentation. The proposed method can be the foundation of a High-Tech technology of by-product separation from production solutions of the pulp and paper enterprises.


O.S. Andranovich1, Postgraduate Student; ResearcherID: P-5570-2019ORCID: 0000-0002-7947-7068 
E.Yu. Demiantseva1, Candidate of Chemistry; Researcher ID: P-5165-2019ORCID: 0000-0001-9570-1827 
A.P. Filippov1,2, Doctor of Physics and Mathematics; ResearcherID: A-9157-2013ORCID: 0000-0002-8729-6275 
R.A. Smit1, Postgraduate Student; Researcher ID: O-2661-2019ORCID: 0000-0002-9665-4636 

Authors job

1Saint Petersburg State University of Industrial Technologies and Design, Higher School of Technology and Energy, ul. Ivana Chernykh, 4, Saint Petersburg, 198095, Russian Federation; e-mail:
2Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bol’shoy prospekt Vasil’yevskogo ostrova, 31, Saint Petersburg, 199004, Russian Federation; e-mail:


sulphate soap, black liquor, demulsifiers, aggregation, micelle formation

For citation

Andranovich O.S., Demiantseva E.Yu., Filippov A.P., Smit R.A. Sulphate Soap Demulsifying with Addition of Non-Ionic Surfactant. Lesnoy Zhurnal [Russian Forestry Journal], 2019, no. 6, pp. 224–232. DOI: 10.17238/issn0536-1036.2019.6.224


  1. Akim E.L. Pulp and Paper Industry in the world and in Russia. Proceedings of the Second International Scientific and Technical Conference “Forests of Russia: Politics, Industry, Science, and Education”. Saint Petersbutg, SPbGLTU, Publ. 2017, pp. 198–202.
  2. Andranovich O.S., Demiantseva E.Yu., Smit R.A., Kharlamova A.N. The Effect of Surface-Active Additives on the Colloid-Chemical Properties of Sulphate Soap. Vestnik molodykh uchenykh Sankt-Peterburgskogo gosudarstvennogo universiteta tekhnologii i dizayna, 2017, no. 1, pp. 60–63. vestnik_mu1_2017.pdf.
  3. Bogomolov B.D., Butsalenko V.S., Ostashenko M.I., Mariyev A.A. Direction of Use of Tall Oil Pitch. Lesokhimiya i podsochka (obzornaya informatsiya), 1989, no. 1, p. 28.
  4. Vladimirova T.M., Sokolov O.M., Tret’yakov S.I. Increasing the Yield of Wood Extractives in Alkaline Delignification. Proceedings of the International Conference “Physical Chemistry of Lignin”. Arkhangelsk, 2005, pp. 157–160.
  5. Koverninskiy I.N., Komarov V.I., Tret’yakov S.I. Complex Chemical Processing of Wood Ed. by I.N. Koverninskiy. ASTU Publ., 2002. 347 p.
  6. Lysogorskaya N.P., Dem’yantseva E.Yu., Klyubin V.V. On the Inhomogeneity of Aqueous Alkaline Solutions of Sulfate Lignin and Wood Resin. Kolloidnyy zhurnal [Colloid Journal], 2002, vol. 64, no. 3, pp. 427–429. DOI: 10.1023/A:1015989330575
  7. Osovskaya I.I., Dem’yantseva E.Yu., Andranovich O.S. Determination of Surface Tension by the Anchor-Ring Method (Du Nui Method). Saint Petersburg, VShTE SPbGUPTD Publ., 2016. 24 p.
  8. Trufanova M.V., Selyanina S.B., Afanas’yev N.I. The Effect of Spruce Sulphate Lignin on the ColloidChemical Properties of the Main Components of Sulphate Soap (Report 1). Khimija Rastitel’nogo Syr’ja [Chemistry of plant raw material], 2010, no. 2, pp. 23–26.
  9. Feygus E.I., Zmachinskaya N.E. Sulphate Soap Isolation and Skimming. Tsellyuloza. Bumaga. Karton (obzornaya informatsiya), 1990, no. 9. 48 p.
  10. Filippov B.S. On the Isolation of Sulphate Soap from Black Liquor. Lesnoy Zhurnal [Forestry Journal], 1964, no. 1, pp. 154–158. URL:
  11. Filippov B.S. Assessment of the Composition of Resinous Substances of Sulphate Soap. Lesnoy Zhurnal [Forestry Journal], 1973, no. 5, pp. 102–105. URL:
  12. Frolov Yu.G. Course of Colloid Chemistry. Surface Phenomena and Disperse Systems. Moscow, Khimiya Publ., 1988. 464 p.
  13. Tsarev G.I., Nekrasova V.B. Sulphate Pulp Production By-Products and Their Use in the Production of Wood-Based Panels. Lesokhimiya i podsochka (obzornaya informatsiya), 1985, no. 3. 40 p.
  14. Tsvetkov A.A., Bogdanovich N.I., Selyanina S.B. Removing of Sulphate Soap as a Way to Increase the Efficiency of Pulp and Paper Enterprises. Tsellyuloza. Bumaga. Karton, 2014, no. 7, pp. 58–61.
  15. Evdokimov A.N., Kurzin A.V., Trifonova A.D., Popova L.M., Buisman G.J.H. Desulfurization of Black Liquor Soap for Production of Crude Tall Oil with Lower Sulfur Content. Wood Science and Technology, 2017, vol. 51, iss. 6, pp. 1353–1363. DOI: 10.1007/s00226-017-0912-y
  16. Gu X.-F., Huo J., Wang R.-T., Wu D.-C., Yan Y.-L. Synergism in Mixed Zwitterionic Surface Activity Ionic Liquid and Anionic Surfactant Solution: Analysis of Interfacial and Micellar Behavior. Journal of Dispersion Science and Technology, 2014, vol. 36, iss. 3, pp. 334–342. DOI: 10.1080/01932691.2014.901915
  17. Huibers D.T.A., Rogers R.R. Environmental Aspects of Tall Oil Distillation. INFORM: International News on Fats, Oils and Related Materials, 1994, no. 4. 526 p.
  18. Prado F.I. Air Emissions Aspects, Tall Oil Plants. INFORM: International News on Fats, Oils and Related Materials, 1994, no. 4. 526 p.
  19. Selyanina S.B, Makarevich N.A., Tel’tevskaya S.E., Afanas’eva N.I., Selivanova N.V. Influence of Adsorption of Lignosulfonates on Kraft Lignin in the Presence of Tall Oil on Separation of Water-Tall Oil Emulsion. Russian Journal of Applied Chemistry, 2002, vol. 75, iss. 11, pp. 1873–1877. DOI: 10.1023/A:1022243010785
  20. Selyanina S.B., Selivanova N.V., Afanasiev N.I., Trufanova M.V. The Model Investigations of the Behavior of Heterogeneous Systems with Participation of Lignin and Extractive Substances. Proceedings of the 8th European Workshop on Lignocellulosics and Pulp (EWLP 2004), Riga, Latvia. Riga, 2004, pp. 285–289.
  21. Tikka P., Kovasin K., Laxén T. Solving Soap and Turpentine Related Process Problems in Softwood Kraft Mills. Pulp and Paper Canada, 2002, vol. 103, pp. 30–35.
  22. Zubarev A.Yu., Iskakova L.Yu. To the Theory of the Aggregation of Polydisperse Colloids. Colloid Journal, 2004, vol. 66, iss. 3, pp. 296–301. DOI: 10.1023/B:COLL.0000030839.66688.ea

Sulphate Soap Demulsifying with Addition of Non-Ionic Surfactant