Plants: Verdigris, Oklahoma

6606 East 540 Road
Claremore, Oklahoma 74019
Phone: 918-266-1511

The Verdigris facility is located on 650 acres just northeast of Tulsa, Oklahoma, in the small community of Verdigris. The plant is adjacent to the Verdigris River and is strategically located near Tulsa’s Port of Catoosa, which is the beginning of the McClellan-Kerr Navigation Waterway System. The site was chosen due to the abundant supply of natural gas in Oklahoma, the proximity to the waterway system, and access to the Burlington Northern railway system.

The two ammonia plants are Kellogg design, and are operating today with a total combined production of over 3,200 tons per day, almost 50% above the original design capacity. Both ammonia plants have undergone several capacity and efficiency improvement projects, which allow the conversion of natural gas, steam, and air into ammonia. At optimal production rates, all but about 800 tons per day of the ammonia is upgraded to UAN solutions.

The Verdigris plant is the largest UAN production facility in North America with the capacity to produce more than 5,600 tons per day of 32% nitrogen product. Verdigris operates two 1,000-TPD Stamicarbon nitric acid plants for UAN production. The UAN plant is a Stamicarbon design once-through urea plant, with sequential neutralizers for the production of ammonium nitrate and UAN. UAN production significantly increased in 1994 with the addition of a supplemental bleach air compressor for the two nitric acid plants.

The plant also produces high purity argon and food grade liquid carbon dioxide.