Chemplex Corporation manufactures acids through the Zimbabwe Phosphates Industries (ZimPhos) company located in Msasa, Harare.
ZimPhos produces sulphuric acid from two plants, one plant uses local iron pyrites as a source of sulphur and the other uses imported elemental sulphur. The pyrites burning plant is maintenance intensive and was upgraded in 1988 to a capacity of 250 tonnes per day. About 85% of the acid produced is used for fertilizer production and the rest is used for aluminium sulphate production and sales, including exports mainly to the mining industry.
Phosphoric acid is produced from phosphate rock concentrate and sulphuric acid as an intermediate product in the production of triple superphosphates. The plant was re-vamped in 1997 doubling the capacity and modernizing the process controls and equipment.