Study on the production of ammonium sulfate fertlizer from phosphogypsum

Abstract EN

The production of ammonium sulfate fertilizer from phosphogypsum is studied.

The phosphogypsum is considered by product from extraction process of sulphoric acid.

The mereseberg process is used a waste of phosphogypsum with ammonium carbonate to produce ammonium sulfate as a main product and calcium carbonate as a byproduct.

It is a process could be used as a successful method in phosphate industry (AL-Qauim).The flow diagram is drawn to illustrate the mersberg process then material balance is done.

The carbonation process is one of the stage of mereseberg method, then carried out at constant temperature (44 Co) because of the reaction is exothermic and high temperature causes decomposition of ammonium carbonate and low temperature causes precipitate different kind of salts.

From results of laboratory experiments the temperature of ammonium sulfate preparation is done in 23Co and the ratio of phosphogypsum to ammonium carbonate (400ml / 192 gm phosphogypsum) at reaction time( 4) hours.

The aim of this work focus on making a process flow diagram which is used in dealing with waste of phosphogypsum and production a useful product.