Abstract: An ammonia expander in a liquefaction process, the ammonia expander reducing the resulting vapor from the liquid ammonia expansion and increasing the percentage of both the feed gas input and the process output. Embodiments of the ammonia expander comprise a radial inflow reaction turbine with an induction generator mounted on a generator shaft and a turbine mounted on a turbine shaft, the turbine submerged in the liquid ammonia. The turbine extracts torque from the liquid ammonia as it flows through the turbine. The torque from the turbine is transferred from the turbine shaft to the generator shaft, allowing for energy to be extracted from the liquid ammonia stream.

Abstract: An apparatus for use in removing oil containing contaminants from articles includes a wash station and a rinse station. At the wash station, the articles are immersed in a tank of wash water containing detergent to remove oil containing contaminants from the articles. A flow of wash water containing the detergent and oil is conducted through an oil retainer. The oil is removed from the wash water and retained by the oil retainer. A flow of wash water which contains detergent and is substantially free of oil, is conducted from the oil retainer apparatus back to the wash tank. After having been removed from the wash tank, the articles are immersed in deionized rinse water in a rinse tank to remove detergent and any remaining oil containing contaminants from the articles.