A fully renovated factory
Chlorine, which is produced together with caustic soda, is the central product of the Vila-seca I plant. The total production capacity of this plant is almost 1 million tonnes per year. Part of the chlorine produced is used to manufacture inorganic derivatives (sodium hypochlorite and hydrochloric acid) at the same plant; another part is supplied to the Vila-seca II plant for the production of PVC; and a third part is sold by pipeline to an external customer.
Between 2015 and 2020, this factory undertook a major modernisation and expansion of its facilities, with an investment of over 60 million euros. As a result of these actions, it now has the largest electrolysis plant in Spain, with a capacity of 146,000 t/year of chlorine. Since the end of 2017, all production has been obtained using membrane cell technology, the most advanced and sustainable technology.
The workforce at Vila-seca I is made up of almost 150 people. This factory, together with those of Tarragona and Vila-seca II, make up the Tarragona industrial complex, which in turn is integrated into the Ercros chlorine derivatives division.
![Granza de sosa sólida](/sites/default/files/styles/image_250/public/content/image/2022/03/02/64/2via-6sosa-062.jpg?itok=dBEil7o9)
Products manufactured at Vila-seca I
In figures
The key figures of the Vila-seca I factory
Workforce
Annual production capacity
Chlorine manufacturer in Spain
Invested between 2016 and 2021
Upgraded facilities
Salt consumed from tail dumps
Electrolysis plant surface area
Products dispatched
A bit of history
![Former mercury electrolysis plant](/sites/default/files/styles/cuadrada200/public/content/image/2021/06/21/1/planta-electrolisis-mercurio.jpg?h=11d3b4fa&itok=VwVol91j)
Start of activity with the production of chlorine, caustic soda and its inorganic derivatives, under the ownership of Energía e Industrias Aragonesas, S.A. (Eiasa). The factory is a pioneer in the Tarragona industrial park.
![Antiguas celdas de membrana de la planta de electrólisis de la fábrica de Vila-seca I](/sites/default/files/styles/cuadrada200/public/content/image/2022/03/02/64/vila-seca-i-celdas-cloro-3.jpg?h=7ccb2969&itok=jMtkmxsg)
Introduction of membrane technology for chlorine production, the most advanced and sustainable process.
![Detalle de la planta de electrólisis de la fábrica de Vila-seca I](/sites/default/files/styles/cuadrada200/public/content/image/2022/01/21/64/planta-de-electrolisis-de-la-fabrica-de-vila-seca-i.jpg?h=82f92a78&itok=0zbPzwWz)
Expansion of the capacity of membrane technology. Chlorine produced by membrane technology accounts for 30% of production.
![Firma de la compra de Aragonesas en 2005](/sites/default/files/styles/cuadrada200/public/content/image/2021/06/21/1/foto-historia-2005.jpg?h=dbfb23f9&itok=rACBLwmC)
On the occasion of the acquisition of the Aragonesas Group, the Vila-seca I factory is integrated into the Ercros chlorine derivatives division.
![Construcción de la ampliación de la planta de electrólisis de la fábrica de Vila-seca I](/sites/default/files/styles/cuadrada200/public/content/image/2022/01/21/64/construccion-de-la-ampliacion-de-planta-de-electrosisi-en-la-fabrica-de-vila.seca-i.jpg?h=f8152b37&itok=QOx_YU1L)
Start of a technological renewal programme. 17 facilities are upgraded or extended at a cost of over 60 million euros.
![Antigua planta de electrólisis de mercurio de la fábrica de Vila-seca I](/sites/default/files/styles/cuadrada200/public/content/image/2022/03/02/64/2via-2cloro-037.jpg?h=958cf23b&itok=H-noiYbd)
The mercury electrolysis plant is shut down and the production capacity of the membrane plant is expanded.
![Ampliación de la planta de electrólisis de la fábrica de Vila-seca I](/sites/default/files/styles/cuadrada200/public/content/image/2021/06/21/1/nueva-planta-membrana.jpg?h=7ccb2969&itok=NuizTlqz)
Further increases in the capacity of the electrolysis plant and the start-up of two hydrochloric acid plants, one sodium hypochlorite plant, as well as other facilities and warehouses.
Certificates of the Vila-seca I factory
The distinctive marks endorse this factory's commitment to sustainability.
Contact the factory
If you would like to visit or contact us, you can start here.
Autovía Tarragona-Salou C-31 B, Km. 6
43480 Vila-seca (Tarragona)
Tel.:+34 977 370 354
Email: complejotarragona@ercros.es