Publication: Magyar Közlöny
Issue: MK-2007-40 (Year: 2007, Number: 40)
Era: 2004-2010
Section: 
Paragraph Index: 308

59. In the chlor-alkali industry, Cl2, alkali hydroxides and hydrogen are produced through electrolysis of a salt solution. Commonly used in existing plants are the mercury process and the diaphragm process, both of which need the introduction of good practices to avoid environmental problems. The membrane process results in no direct mercury emissions. Moreover, it shows a lower electrolytic energy and higher heat demand for alkali hydroxide concentration (the global energy balance resulting in a slight advantage for membrane cell technology in the range of 10 to 15%) and a more compact cell operation. It is, therefore, considered as the preferred option for new plants. Decision 90/3 of 14 June 1990 of the Commission for the Prevention of Marine Pollution from Land-based Sources (PARCOM) recommends that existing mercury cell chlor-alkali plants should be phased out as soon as practicable with the objective of phasing them out completely by 2010.

Source: https://magyarkozlony.hu/hivatalos-lapok/27e75a8cd1ad627908b248500ebbcc5bfa21e53f/dokumentumok/08a63e1b22fa9bd1e1deda098c61d7cbd099a770/letoltes