The project is a joint venture between Sahara and Saudi Arabian Mining Co (Maaden) and has a production capacity of 250,000 tons per year of caustic soda and 300,000 of ethylene dichloride per year.

Caustic soda is used for the refining of bauxite to alumina.

Daelim will perform the engineering, procurement and construction (EPC) work, Sahara said in a statement.

The project will be financed through banks and the state-run Saudi Industrial Development Fund (SIDF).

The project is due to be completed in the fourth quarter of 2012, it added.

Maaden said in November it received a SR900 million loan ($240 million) from SIDF to finance the project.