Abstract:
Processes for recovering ammonia from an ammonium sulfate stream include reacting the ammonia sulfate stream with a lime slurry to form a slurry comprising calcium sulfate and ammonia; providing the slurry comprising calcium sulfate and ammonia to a stripper configured to recover the ammonia from the slurry; utilizing a heat source from a chilled ammonia process to the stripper; and extracting an ammonia vapor stream from the stripper. Also disclosed are systems for performing the processes.
Abstract:
Processes for recovering ammonia from an ammonium sulfate stream include reacting the ammonia sulfate stream with a lime slurry to form a slurry comprising calcium sulfate and ammonia; providing the slurry comprising calcium sulfate and ammonia to a stripper configured to recover the ammonia from the slurry; utilizing a heat source from a chilled ammonia process to the stripper; and extracting an ammonia vapor stream from the stripper. Also disclosed are systems for performing the processes. Also claimed is a process for recovering sodium hydroxide from a sodium sulfate stream by reacting the sodium sulfate stream with a lime slurry, separating the formed calcium sulfate in a thickener and extracting the sodium hydroxide from the thickener.
Abstract:
A potash-extraction system and method for extracting potash from a brine containing potash without the use of water-consuming evaporation ponds or additional chemicals is disclosed. The potash processing system uses a mechanical-vapor recompression (MVR) cycle to separate salt and then potash from a sylvinite brine containing salt and potash. In embodiments, the latent heat recovered from condensing vapor may be used to boil the brine to precipitate some salt and remove some water (in the form of water vapor) from the brine. The remaining potash-concentrated brine may then be cooled to precipitate potash from the solution. The precipitated potash may then be further processed for final use.
Abstract:
There is disclosed a process of making nano-sized or micro-sized precipitate particles. The process comprising the steps of mixing, in a reaction zone, a metal salt solution with a precipitant solution to form a precipitate, said precipitate being at least one of a metal chalcogenide, metal hydroxide and metal oxide; and applying a shear force to said mixing solutions in said reaction zone during said mixing step, wherein said shear force and the conditions within said reaction zone form said nano-sized or micro-sized precipitate particles.
Abstract:
La presente solicitud de patente de invención se dirige a un método para la producción de hidróxido de litio (LiOH) directamente a partir de cloruro de litio (LiCl), sin necesidad de una producción intermedia de carbonato de litio o similar. Específicamente, la invención enseña un método de producción directa de hidróxido de litio a partir de cloruro de litio que contempla la conversión de LiCl a LiOH a partir de una salmuera, para luego cristalizar el LiOH a fin de obtener hidróxido de litio monohidratado crudo (LiOH.H2O crudo) y posteriormente sometido a una segunda cristalización para producir LiOH.H2O puro. Finalmente es secado y envasado.
Abstract:
This invention provide processes for producing carboxylic acid product, along with useful salts. The carboxylic acid product that is produced according to this invention is preferably a C 2 -C 12 carboxylic acid. Among the salts produced in the process of the invention are ammonium salts.