STPP yog ib qho tseem ceeb tshaj plaws ntawm kev tsim cov hmoov tshuaj ntxuav. Nws cov tshuaj formula yog Na5P3O5. Cov txheej txheem kev npaj STPP yog muaj peb kauj ruam: kev npaj phosphoric acid los ntawm phosphate pob zeb, sodium pyrophosphate los ntawm neutralization ntawm cov kua qaub, thiab thaum kawg tsim STPP los ntawm kev hws thiab polymerization ntawm sodium pyrophosphate.There muaj ob txheej txheem tam sim no hauv kev siv rau Npaj STPP:
1. Cov txheej txheem ntub dej sib xyaw ua ke cov khoom xyaw hauv cov pob zeb phosphate mus rau lawv cov ntsev sib xyaw sulfuric thiab ntsev ntsev phosphoric. Cov kua dej phosphoric acid yog neutralized nyob rau hauv ntu txuas mus rau hauv sodium pyrophosphate, tom qab ntawd cov phosphate yuav tsum xau thiab polymerized rau hauv STPP.
2.Thermal txheej txheem phosphate pob zeb, coke, thiab silicate pob zeb rau hauv qhov cub hluav taws xob kom tau txais phosphorus. Cov phosphorus yog hlawv, thiab phosphorus pentoxide yog tsim. Tom qab ntawd yog hydrated thiab polymerized rau hauv STPP.
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