Development of combined granulation and encapsulation process in production of sodium percarbonate

Abstract

A combined granulation and encapsulation procedure in the production of sodium percarbonate (SPC) has been developed that enables the stabilization of SPC to form a coating on the surface of product granules in one technological stage. The separation of the granulating and encapsulating agents during the drying process and formation of an encapsulating coating are performed due to large differences in the solubility of the components of initial solution. Sodium polyphosphate or oxyethylidenediphosphonic acid used as encapsulating agents with an initial solution concentration (1%) in the combined granulation and encapsulation process enables the preparation of encapsulated SPC, which is significantly more resistant to wet carbon dioxide than unencapsulated product.

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Correspondence to P. V. Prikhodchenko.

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Original Russian Text © A.G. Medvedev, A.V. Zhubrikov, E.A. Melnik, I.V. Shabalova, A.A. Mikhailov, N.V. Khitrov, T.A. Tripolskaya, F.V. Grechnikov, V.M. Novotortsev, P.V. Prikhodchenko, 2016, published in Khimicheskaya Tekhnologiya, 2016, Vol. 17, No. 4, pp. 155–164.

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Medvedev, A.G., Zhubrikov, A.V., Melnik, E.A. et al. Development of combined granulation and encapsulation process in production of sodium percarbonate. Theor Found Chem Eng 51, 515–522 (2017). https://doi.org/10.1134/S004057951704011X

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Keywords

  • granulation
  • encapsulation
  • sodium percarbonate
  • stabilization
  • sodium polyphosphate