85% of thermal phosphoric acid is diluted appropriately andthen passed into a venturi gas flow mixing reactor, and thenpassed into ammonia for mixing and reaction, after the reactionis completed, filtration is carried out.
The filtrate is cooled to below 26'C in the cooling crystallizer.precipitated crystals, and then separated and dehydrated, driedto produce finished products.
Or dilute to so% ~ss%% of dilute phosphoric acid meteringadded to the enamel kettle with stirrer and iacket, under stirringusing ammonia distributor slowly pass ammonia for neutraliza-tion reaction, after the reaction is completed for cooling crystalli-zation, after separation and dehydration and drying, to get thefinished product ofammonium dihydrogen phosphate.
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