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
(44Co) 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.