For the strict quality requirements for food grade phosphoric acid,the process flow and dearsenication,desulfhydrylation,decolorization and removal of easily oxidized substances for production of food grade phosphoric acid by continuous operation of industrial phosphoric acid are highlighted.

Take 5000 t/a food grade phosphoric acid production plant as an example, analyzes the feature of material after dearsenic and the technical points for solid-liquid separation.

A rapid and precise method for simultaneous determination the contents of copper, nickel, lead, cadmium, manganese and titanium (Cu, Ni, Pb, Mn, Cd and Ti) in food grade phosphoric acid was established.

01 );The results indicated that phosphatide compound foodis able to improve the immune function of rat,but the weight of immune organ(spleen, thymus,etc)remain as it was.

Production technologies of food grade calcium hydrogen phosphate such as phosphoric acid purification method,bone glue extraction method and applications are introduced in detail.

Preparation method and chief process conditions of food grade calcium hydrogen phosphate from Kiln - way phosphoric acid are investigated and corresponding flow path is presented.

Determination of magnesium oxide from food grade magnesium phosphate was studied by dissolution of samples with dilute hydrochloric acid,coordination with EDTA standard solution and back titration with magnesium sulfate standard solution.