After the precipitation of the NaCl, the the residual bittern enriched in magnesium salts is then discharged to a final set of ponds where it is sorted as a raw material for future use to produce magnesium salts as well as potassium, boron and bromine compounds. .

1- Production Of Magnesium Sulphate- Epsom Salt (MgSO4.7H2O)

In the third stage of the project, magnesium Sulphate is to be recovered from the bittern left after the extraction of sodium Sulphate and sodium chloride, to produce Epsom salt as the end product by dissolving- crystallization process and evaporation of the bittern at high temperature.

Magnesium sulphate is used for soil nutrition and soil condition specially in vegetables and fruits forming. on 7/6/2004 a contract was signed between EMISAL and the Chinese Company "CNTIC" to construct Magnesium sulphate plant (Epson salt) of 27000 T/Y capacity is to cover an area of 14500 m² near magnesium pond. Total investment L.E 123 million, annual sales revenue reaches L.E 25 million. Plant construction will take 30 month. Production is expected by the begining of year 2007.

2- The Residual Solution

The residual solution after the recovery of the sodium Sulphate , sodium chloride and magnesium salts proved to contain appreciable concentrations of potassium, boron and bromine salts. Studies and experimentation to extract these salts are currently in progress.

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