Siirtec Nigi S.p.A.
We primarily design and supply process plants and equipment for the oil and gas industry, ranging from oil and gas field production facilities to the treatment of natural and refinery gas, and the revamping of ammonia and urea plants. We also provide
Introduction
We primarily design and supply process plants and equipment for the oil and gas industry, ranging from oil and gas field production facilities to the treatment of natural and refinery gas, and the revamping of ammonia and urea plants. We also provide...

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Viru Keemia Grupp (VKG) is the biggest oil shale processing company in Estonia and one of the leading shale oil producers in the world.
In 2006 VKG processed about 1,47 million tones of oil shale and sold 200,000 tonnes of shale oil. The com...