Unlike Freeport, which must bring in some of its natural gas and liquid feedstocks by ship and railcar, Ras Tanura's chemical plants will get their daily diet of some 40, 000 barrels of oil-derived naphtha and 70 million cubic feet of natural gas by (very short) pipelines.
Some natural gas MLPs separate out liquids like propane and butane that compete against petroleum-based products like naphtha in the industrial chemicals market.