Business Wire·May 7, 2026, 1:30 AM ET

AdvanSix Announces Process Design and License Agreement to Assess Expansion of Its Ammonia Platform to Supply Growing Regional Diesel Exhaust Fluid Market

AdvanSix has entered a process design & licensing agreement to assess expansion of its Hopewell, Virginia ammonia platform for domestic Diesel Exhaust Fluid (DEF) manufacturing.
The expansion leverages existing site inputs including carbon dioxide, ammonia, & high-purity water to support growing U.S. demand for NOx emission reduction products.
Stamicarbon (Nextchem) was selected to provide NX STAMI™ Urea technology & process design for a new urea melt plant integrated with a DEF production unit.
This configuration represents a first-of-its-kind application where 100% of urea melt production is dedicated exclusively to DEF conversion.
The project aims to advance through detailed engineering & development phases before a final investment decision targeted for the first half of 2027.
A multi-year capital investment is anticipated with a potential DEF plant startup in 2029.
The existing Hopewell site continues full commitment to ammonium sulfate fertilizer production for the U.S. farming industry alongside this potential expansion.
Demand for DEF is driven by Class 8 vehicle usage in the Mid-Atlantic & Northeast, alongside expanding regulatory requirements across transportation, agriculture, & industrial sectors.