Large Volume Inorganic Chemicals - Ammonia ... - ammk-rks.net

Chapter 99.2 Applied processes and techniques9.2.1 OverviewAN (NH 4 NO 3 ) is produced by neutralising 50 – 70 wt-% aqueous HNO 3 with gaseous NH 3 :NH 3 + HNO 3 f NH 4 NO 3The reaction is highly exothermic and proceeds rapidly. The heat produced is often used togenerate steam. The obtained AN solution can be concentrated by evaporation. Most appliedproduction processes comprise three main operations: neutralisation, evaporation andsolidification (prilling or granulation).H 2 SO 4(optional for ASNproduction)HNO 3 NH 3NeutralisationEmissionto airSteamSteam purification,condensation,condensatetreatmentSteamEvaporationExhaust gastreatmentCondensateOptional:dolomite,gypsum,limestoneand otheradditivesMixingPrilling orgranulationDrying, cooling,conditioningANOptional: CAN, ASN, MAN, etc.Figure 9.1: Overview of the production of AN and related productsThis figure is based on [52, infoMil, 2001] and descriptions in [148, EFMA, 2000]Large Volume Inorganic Chemicals – Ammonia, Acids and Fertilisers 365