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HOUSTON, May 28 (Reuters) - Colombia's state-run Ecopetrol has launched a tender to buy a 108,000-110,000 barrel cargo of the diluent naphtha to be picked up June 14-15 in the Caribbean or on the U.S. Gulf Coast, according to a document seen by Reuters on Wednesday.
The oil company previously this month bought a 290,000-310,000 barrel cargo of the same product that it will receive on June 5-9. Colombia and Venezuela import naphtha to mix with heavy crudes.
Ecopetrol will receive bids until May 29 for this tender and they must be indexed to natural gasoline prices at Mont Belvieu.
Colombia has ramped up tenders on the open market in recent months to import fuels since it halted the 80,000 barrel per day (bpd) Cartagena refinery for a major expansion, while its crude exports decreased from March to May because of problems in its main crude pipleline. (Reporting by Marianna Parraga)