Trisodium Phosphate 98%min ( T S P )

Trisodium Phosphate 98%min ( T S P )
【Properties】:
1)Chemical formula: Na3PO412H2O
2) Molecular weight: 380.14
3) White or colorless crystals, effloresce in air, soluble in water easily but not in organic solvent
4) Water solution is alkali 5) PH of 1% solution is 12.1
6) Density is 1.62, melting point is 73.4
7）CAS.NO:7601-54-9 8）H.S.CODE:28352910 9）Capacity: 4000MT/year

【Specifications】:
Main content (Na3PO4) 98% min.
Phosphorus pentoxide (as P2O5) 18.3% min.
Sulphate (as SO4) 0.5% max.
Chloride (as Cl) 0.3% max
Water insoluble 0.10% max
Sodium oxide (as Na2O) 15.5 - 19%

【Application】:
Used as soft water agent, cleaning agent for electroplating color fixer for fabric dyeing, flux for fabric dyeing , flux for enamel ware manufacturing
【Package of products】:
Each bag of soidum formate shall be 25±0.2kg,and package of lining plastic film knitting bag shall be adopted.
【Production Process】
Na2HPO4+NaOH→Na3PO4+H2O
1. A process for the production of trisodium phosphate dodecahydrate Na3 PO4. 12H2 O. 1/4NaOH which comprises
2. preparing a solution of trisodium phosphate having a molar ratio of sodium to phosphorus of about 3.25:1,
3. adding to said solution an amount of sodium sulfate in the range of 0.2 to 0.8 percent, by weight of dry trisodium phosphate salt therein,
4. evaporating said solution to cocrystallize said trisodium phosphate dodecahydrate with said sodium sulfate from said solution thereby to produce a trisodium phosphate dodecahydrate having the characteristic that it is stable in storage under ordinary variations of humidity and temperature without deterioration of the crystal and without the formation of agglomerated particles or cakes.
5. A process in accordance with claim 1, wherein the amount of sodium sulfate added is 0.30 percent of the trisodium phosphate dodecahydrate crystals.
6. A process in accordance with claim 1, wherein evaporation is carried out in continuous fashion, such that product is produced at a temperature between 40° and 55° C.
7. A process in accordance with claim 1, wherein the amount of sodium sulfate added is 0.5 percent, by weight, of the trisodium phosphate