Assertion: phosphoric acid's amount | /r/HasProperty | liquefied ammonia
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Source sentences:
text: The object of the present invention is achieved like this: a kind of is the method for raw material production Sodium phosphate dibasic with phosphoric acid and sodium sulfate, is that 1: 1.6～2.4 amount is thrown in material with phosphoric acid and sodium sulfate according to mol ratio, stir, drip mass percent then and be 26%～28% ammoniacal liquor or liquefied ammonia, the pH value of regulation system is greater than 8.0, crystallisation by cooling, the crystallisation by cooling temperature is 15 ℃～25 ℃, filtration obtains sodium hydrogen phosphate crystalline ammonium and filtrate, in the sodium hydrogen phosphate crystalline ammonium, add soda ash and mix, wherein soda ash is according to Na