Borouge has started operations at key units - ethane cracker and polyethylene plant of the US$5 bln, phase two expansion of its facility at Ruwais. This 1.5 mln tpa cracker is the world’s biggest ethane cracker, and will take 12 to 18 months to ramp up production to full capacity. Borouge is also starting the biggest olefins conversion unit of 750,000 tons, converting ethylene to propylene. Two polypropylene plants, with 400,000 tpa capacity, are part of the second-phase expansion project and will be started up in the next few months. The expansion will bring the company's total production capacity to two mln tpa.