Air Liquide S.A. , is a French multinational company which supplies industrial gases and services to various industries including medical, chemical and electronic manufacturers. Founded in 1902, after Linde it is the second largest supplier of industrial gases by revenues and has operations in over 80 countries.

It has headquarters at the 7th arrondissement of Paris, France.

Air Liquide recently started the world’s largest oxygen production unit for Sasol, an international integrated energy and chemicals company. Air Liquide invested around €200 million for the construction of this Air Separation Unit (ASU) in Secunda, with a total production capacity of 5,000 tonnes of oxygen per day.

Owned and operated by Air Liquide, it is the first ASU that Sasol has chosen to outsource to a specialist of industrial gas production at this site. Located in Sasol’s Secunda site (around 140 km East of Johannesburg), the new ASU supplies Sasol with large quantities of oxygen used for production of fuels and chemicals.

The unit was designed and built by Air Liquide’s Engineering & Construction team using leading edge technologies that meet the highest standards of safety, reliability and efficiency, while increasing production capacity.

The ASU's design is based on Air Liquide’s proprietary technologies including several first of its kind innovations in the air compression process, which allow for an annual electricity consumption reduction of more than 20%, contributing to reducing the customer’s carbon footprint.

According to en.wikipedia & hydrocarbonprocessing