Recovery of ammonia in ihe process of silica precipitation from post-filtration lyes in the technique of Solvay

• Autorzy: Żurawska J. , Krysztafkiewicz A.
• Języki publikacji: EN

Abstrakty

EN

Studies were performed on the production of highly dispersed silica from the aqueous solution of sodium metasilicate using the waste ammonium chloride, a by-product of soda production according to the technique of Solvay. Silica was precipitated at various molar ratios of sodium metasilicate to ammonium chloride, ranging from 2.0 to 1.0. The significant aim of the undertaken studies involved the estimation of the total ammonia content in the filtrate obtained, following silica precipitation and determining the volume ratio of the substrates at which no ammonia was present in the gaseous phase. The total ammonia content was established using the formaldehyde method. One of the basic aims of the studies, involved also the application of the sodium metasilicate solution for the recovery of ammonia. In such conditions, apart from the recovered ammonia, the precipitated highly dispersed silica was also obtained, the product of high industrial significance.

Słowa kluczowe

EN

precipitated silica; waste ammonium chloride; technique of Solvay

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2004
• Tom: Vol. 6, nr 2
• Strony: 62--65
• Opis fizyczny: Bibliogr. 9 poz., tab., rys.

Twórcy

autor

Żurawska J.

• Poznań University of Technology, Institute of Chemical Technology and Engineering, PI. M. Skłodowskiej-Curie 2, 60-965 Poznań

autor

Krysztafkiewicz A.

• Poznań University of Technology, Institute of Chemical Technology and Engineering, PI. M. Skłodowskiej-Curie 2, 60-965 Poznań

Bibliografia

• (1) Her R. K., The chemistry of silica. John Wiley & Sons, New York 1979.
• (2) Bergna H. E., The colloid chemistry of silica, Advances in Chemistry Series 234, ACS, Washington, DC, 1994.
• (3) Jesionowski T. and Krysztafkiewicz A., Properties of highly dispersed silicas precipitated in an organie medium, J. Dispersion Sci. Technol., 1999, 20, 1609.
• (4) Krysztafkiewicz A., Jesionowski T. and Rager B., Reinforcing of synthetic rubber with cement dust modified by coupling agents, J. Adhesion Sci. Technol., 1997, 11, 507.
• (5) Sung-Seen Ch. and Ik-Sik K., Filler-polymer interactions in filled polybutadiene compounds., Europ. Polym. J., 2002, 38, 1265.
• (6) Sheng E., Freakley P.K., Sutherland I . and Bradley R.H., Effects of multifunctional additive on bound rubber in carbon black and silica filled natural rubbers., Europ. Polym. J., 1996, 32, 35. _
• (7) Zurawska J., Jesionowski T, Krysztafkiewicz A., Studies on precipitation of highly dispersed silica from sodium metasilicate - sodium hydrogencarbonate system, J. Chem. Technol. Biotechnol., 2002, 77, 917.
• (8) Niderlinski A , Bukowski A , Koneczny H., Soda i produkty towarzyszace, WNT, Warszawa 1978.
• (9) Koneczny H., Otrzymywanie NaHC03 i NH4C1 przy produkcji sody metoda Solvaya, UMK Toruń 1991.