Iran is now producing the highest-grade of liquefied petroleum gas (LPG) from its sixth refinery in the South Pars gas field, according to Ahmad Valipour, a supervisor at the site, Zawya reports.

Valipour noted in Times of News that ‘[t]he allowed maximum of sulfur in export-worthy liquid gas in the sixth refinery has been improved more than 90 percent to less than 10 ppm (Parts Per Million) which in practice stands at one pmm, showing a very high quality.”

He also added that “[i]n the sixth refinery, through implementing advanced procedures, the efficiency of sulfur recycling is 99.95 percent, more than the 97 percent in the previous planning of the refineries.”

The South Pars gas field is the world’s largest natural-gas field and is split between the territorial waters of Qatar and Iran.