Iofina (LON:IOF) said crystalline iodine production was up 90% last year as it predicted 2015 would be “exceptional".
The group, which extracts the element from brine water that comes from oil and gas wells, said output was 327.7 metric tons in 2014, up from 171 tons previously.
The company is predicting its IOsorb plants across the US will deliver 220-260 tons in the first half of this year alone.
Iofina said revenues are expected to have risen 35% in 2014 after prices fell more sharply than anticipated.
Chief executive Tom Becker said: "I am delighted that that we had a productive second half of 2014 and continue to optimise iodine production at our IOsorb plants while providing the iodine chemical derivatives market with quality, innovative products through Iofina Chemical.
“Through improved plant efficiencies and strategic growth the board expects 2015 to be an exceptional year for Iofina and looks forward to updating shareholders on progress."
Separately, the firm updated on its Montana permit application, saying that a “portion of one objection” has been deemed invalid.
The hearing date for this single objection, from a local water supply competitor, is tentatively scheduled for February 19.