//2015: Total switch of chlorine production to the ecologically sound membrane technology

2015: Total switch of chlorine production to the ecologically sound membrane technology

Taking the second membrane electrolysis plant online in April 2015 completed the transition of chlorine production to the modern, ecologically sound membrane technology. Our first membrane electrolysis plant has been operational since 2010. Using this technology enables a reduction of CO2 emissions by 140,000 tonnes annually from May 2015 onward. Having finished this investment project, we were able to comply with the EU requirement to decommission facilities using the mercury cell process nearly three years early.


Principal/Segment: PCC Rokita SA/Chlorine segment
Location: Factory site of PCC Rokita SA in Brzeg Dolny (Poland)
Capacity: 209,000 metric tons of chlorine and 236,000 metric tons of caustic soda
Commissioned: Part 1: March 2010 / Part 2: April 2015
Project description: The commissioning of our new chlor-alkali electrolysis facility was completed in April 2015, marking the conclusion of our full-scale technology switch to the environmentally friendly membrane process.

In taking this step, we have both significantly extended the capacity of our production facilities and met future environmental regulations ahead of the relevant deadlines. Power consumption has decreased substantially and CO2 emissions have been reduced by 140,000 metric tons per year. In mid July 2015, PCC Rokita SA achieved a planned further increase of its chlorine production capacity. The addition of a fifth electrolyzer to the new membrane electrolysis plant marked the completion of the last expansion phase of the new chlor-alkali electrolysis facility.

In 2016, this modernization and expansion investment made its first – and a significant – full-year contribution to annual earnings. Ancillary process optimization activities were also carried out in 2016 and 2017. Through these improvements, PCC Rokita SA has increased the total annual capacities of its chlorine production plant by an additional 10% to 148,000 metric tons of chlorine and 167,000 metric tons of caustic soda.

Moreover, two further electrolyzers came on stream at the beginning of June. They will help avoid production downtime, for example during maintenance work, and also ensure a further reduction of electricity consumption and the associated CO2 emissions.