A method for the conversion of gypsum into sodium sulphate. | Pakistan Journal of Scientific and Industrial Research 1983

Author(s)

M. Saeed Pakistan Council of Scientific & Industrial Research, PCSIR Laboratories, Lahore, Pakistan

S. Mansoor Pakistan Council of Scientific & Industrial Research, PCSIR Laboratories, Lahore, Pakistan

A. Khalique Pakistan Council of Scientific & Industrial Research, PCSIR Laboratories, Lahore, Pakistan

M. K. Bhatty Pakistan Council of Scientific & Industrial Research, PCSIR Laboratories, Lahore, Pakistan

Abstract

Production of sodium sulphate by the action of sodium chloride on indigenous gypsum has been studied. The work describes two methods utilizing cation exchange resin whereby 90% of gypsum has been transformed into sodium sulphate of 90% purity. In the first method gypsum powder was used and particle size (400 mesh) caused completion of reaction in 7 min whereas 13 and 28 min were required respectively for 300 and 200 mesh size. In the second method same results were achieved without grinding gypsum thus eliminating an energy consuming step. One cubic foot of resin could convert 1 kg of gypsum and 700 g sodium chloride into 900 g of sodium sulphate with 570 g calcium chloride as by product. The final product of 90% purity was obtained by primary evaporation in a solar tank followed by final evaporation by natural gas.

Publication Details

Page(s) 272-274

DOI DOI not available

Published Journal: Pakistan Journal of Scientific and Industrial Research, Volume: 26, Issue: 4, Year: 1983

Keywords

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