Dissolution of colemanite in (NH4)2SO4 solutions

Mehmet Tunc; Mehmet Muhtar Kocakerim; "Ozkan K"uc"uk; Mehmet Aluz

Korean Journal of Chemical Engineering, Vol.24, No.1, 55-59, January, 2007

DOI10.1007/s11814-007-5009-0 Export Citation

Dissolution of colemanite in (NH4)2SO4 solutions

Mehmet Tunc, Mehmet Muhtar Kocakerim^{1, †}, "Ozkan K"uc"uk¹, and Mehmet Aluz

Department of Chemistry, Y"uz"unc"uy l University, Van, Turkey
¹Engineering Faculty, Department of Chemical Engineering, Atat"urk University, Erzurum, Turkey

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Turkey is the country having the richest boron ores in the world, and colemanite, tincal and ulexite are the ores being mined mostly in Turkey. These ores are used in the production of various boron compounds of which the production methods are generally patented. Colemanite ore also is reacted with sulfuric acid to product boric acid. Produced by this method, boric acid contains various impurities which reduce the market value and are difficult to remove. This study investigated the reaction between colemanite and ammonium sulfate as an alternative method to produce boric acid. Particle size, ammonium sulfate concentration, solid to liquid ratio and reaction temperature were chosen as parameters. In results, the conversion rate was increased by decreasing particle size and solid to liquid ratio, by increasing ammonium sulfate concentration and temperature. A semi-empirical model with 40.46 kJmol.1 activation energy representing this process was found as follows: 1-(1-X)^1/3=2.12×10²·C1^1.38·R.^0.75·(S/L)^-0.44·e.^4866/T·t^0.61.

Keywords:Ammonium Sulfate;Colemanite;Dissolution;Dissolution Kinetics

[References]

Alkan M, Dogan M, Chem. Eng. Process., 43(7), 867 (2004)
Alkan M, Kocakerim MM, Colak S, J. Chem. Technol. Biotechnol., 35A, 382 (1985)
Avrami M, J. Chem. Phys., 7, 1103 (1939)
Ceyhun I, Kocakerim MM, Sarac H, Colak S, Theoretical Foundations of Chemical Engineering, 33, 253 (1999)
Greenberg AE, Trussel RR, Clesceri LS, Standard methods for the examination of water and wastewater, American Public Health Association, Washington, (16 th. Ed.), pp. 276-277 (1985)
Gulensoy H, Savc H, Bulletin of the Mineral Research and Exploration Institute of Turkey, 86, 77 (1976)
Imamutdinova VM, Zh. Prikl. Khim., 40, 2593 (1967)
Imamutdinova VM, Zh. Prikl. Khim., 40, 2596 (1967)
Imamutdinova VM, Zh. Pricl. Khim., 51, 260 (1978)
Imamutdinova VM, J. Appl. Chem. U.S.S.R., 51, 249 (1978)
Karagolge Z, Alkan M, Kocakerim MM, Metall. Trans. B, 23B, 409 (1992)
Kucuk O, Kocakerim MM, Copur M, Yarta A, Can. Metall. Q., 44, 53 (2005)
Kucuk O, Can. Metall. Q., 44, 53 (2005)
Kucuk O, Kocakerim MM, Yartasi A, Copur M, Ind. Eng. Chem. Res., 41(12), 2853 (2002)
Kum C, Alkan M, Kocakerim MM, Hydrometallurgy, 36, 359 (1994)
Levenspiel O, Chemical reaction engineering, 2nd End. John Wiley and Sons, New York, pp. 566-586 (1999)
Okur H, Tekin T, Ozer AK, Bayramoglu M, Hydrometallurgy, 67, 79 (2002)
Ozmetin C, Kocakerim MM, Yapici S, Yartasi A, Ind. Eng. Chem. Res., 35(7), 2355 (1996)
Sevim F, Demir F, Bilen M, Okur H, Korean J. Chem. Eng., 23(5), 736 (2006)
Temur H, Yartasi A, Copur M, Kocakerim MM, Ind. Eng. Chem. Res., 39(11), 4114 (2000)
Yarta A, Ozmetin C, Kocakerim MM, Demirhan MH, Chimica Acta Turcica, 26 (1998)
ZareNezhad B, Korean J. Chem. Eng., 21(5), 956 (2004)
ZareNezhad B, Korean J. Chem. Eng., 20(1), 44 (2003)
Zdanovskii AB, Issled. Sint. Boratev, Chem. Abs., 97, 151479 (1982)

[Referenced By]

[1] Alkan M, Dogan M, Chem. Eng. Process., 43(7), 867 (2004)

[2] Alkan M, Kocakerim MM, Colak S, J. Chem. Technol. Biotechnol., 35A, 382 (1985)

[3] Avrami M, J. Chem. Phys., 7, 1103 (1939)

[4] Ceyhun I, Kocakerim MM, Sarac H, Colak S, Theoretical Foundations of Chemical Engineering, 33, 253 (1999)

[5] Greenberg AE, Trussel RR, Clesceri LS, Standard methods for the examination of water and wastewater, American Public Health Association, Washington, (16 th. Ed.), pp. 276-277 (1985)

[6] Gulensoy H, Savc H, Bulletin of the Mineral Research and Exploration Institute of Turkey, 86, 77 (1976)

[7] Imamutdinova VM, Zh. Prikl. Khim., 40, 2593 (1967)

[8] Imamutdinova VM, Zh. Prikl. Khim., 40, 2596 (1967)

[9] Imamutdinova VM, Zh. Pricl. Khim., 51, 260 (1978)

[10] Imamutdinova VM, J. Appl. Chem. U.S.S.R., 51, 249 (1978)

[11] Karagolge Z, Alkan M, Kocakerim MM, Metall. Trans. B, 23B, 409 (1992)

[12] Kucuk O, Kocakerim MM, Copur M, Yarta A, Can. Metall. Q., 44, 53 (2005)

[13] Kucuk O, Can. Metall. Q., 44, 53 (2005)

[14] Kucuk O, Kocakerim MM, Yartasi A, Copur M, Ind. Eng. Chem. Res., 41(12), 2853 (2002)

[15] Kum C, Alkan M, Kocakerim MM, Hydrometallurgy, 36, 359 (1994)

[16] Levenspiel O, Chemical reaction engineering, 2nd End. John Wiley and Sons, New York, pp. 566-586 (1999)

[17] Okur H, Tekin T, Ozer AK, Bayramoglu M, Hydrometallurgy, 67, 79 (2002)

[18] Ozmetin C, Kocakerim MM, Yapici S, Yartasi A, Ind. Eng. Chem. Res., 35(7), 2355 (1996)

[19] Sevim F, Demir F, Bilen M, Okur H, Korean J. Chem. Eng., 23(5), 736 (2006)

[20] Temur H, Yartasi A, Copur M, Kocakerim MM, Ind. Eng. Chem. Res., 39(11), 4114 (2000)

[21] Yarta A, Ozmetin C, Kocakerim MM, Demirhan MH, Chimica Acta Turcica, 26 (1998)

[22] ZareNezhad B, Korean J. Chem. Eng., 21(5), 956 (2004)

[23] ZareNezhad B, Korean J. Chem. Eng., 20(1), 44 (2003)

[24] Zdanovskii AB, Issled. Sint. Boratev, Chem. Abs., 97, 151479 (1982)