Nitric Acid Filters：
Our Filters has provided Fiber Bed Filters to the Nitric Acid Industry worldwide for more than twenty years. Nitric acid is produced by the reaction of Oxygen (provided by atmospheric air) and Ammonia to produce Nitrous gas that is then absorbed in water. The reaction takes place over a catalyst that is composed primarily of Platinum. Fiber bed filters are often used for removing sub-micron platinum particles from the product stream. The media from these elements is typically removed and reprocessed to reclaim the platinum at 60 to 180 day intervals. Over the course of a production campaign, Platinum is lost from the catalyst and carried downstream by the nitrous gas. The Filters offers two styles of filter to capture the precious metal for recovery by refining facilities, thereby improving annual cash flow of the plant.
The Filters conventional blanket wrap fiber bed filter is an economical means of recovering the platinum. Our Pleated Filter offers the same or better recovery efficiency while providing significantly more filter surface area and the ability to run longer production campaigns.
Our filter designs allow plant maintenance crews to remove and replace the filter media easily on-site providing savings in shipping costs.
During the absorption of the Nitrous gas in water to yield product acid, inert Nitrogen exits the top of the absorber column often carrying nitric acid mist. If not removed, the acid mist can cause corrosion in downstream equipment.
The Filters fiber bed diffusion filters protect the downstream equipment by removing 100% of acid mist particles larger than 3 microns and 99.9% of acid mist particles smaller than 3 micron. Acid collected by the filters can be recovered by routing it to the product storage tank. Filters in this service can provide many years of life before replacement of the filter media is required.
Platinum Recovery Filter：
