Orthophosphoric acid yog ib lub pob zeb me me hygroscopic pob zeb diamond uas muaj peev xwm yaj ua kua rau yuav luag txhua cov kua. Lub ntsiab lus melting ntawm cov kua qaub no yog li 43 ° C.
Kev siv cov phosphoric acid
Phosphoric acid tau pom cov ntawv thov nyob hauv ntau hom kev lag luam. Ntau tshaj li 90% ntawm tag nrho cov kua qaub mus rau kev tsim cov chiv. Nws cov ntsev yog assimilated los ntawm cov nroj tsuag hauv daim ntawv ntawm anions. Ua tsaug rau phosphorus, nroj tsuag muaj peev xwm los tsim cov txiv hmab txiv ntoo thiab noob. Cov ntsiab lus txaus ntawm cov khoom no ua rau nws yooj yim rau lawv kom zam lub caij ntuj no, uas yog qhov tshwj xeeb tshaj yog rau cov cheeb tsam qaum teb.
Hauv kev lag luam khoom noj khoom haus, phosphoric acid paub yog additive E338. Nws muaj peev xwm txhim kho qhov saj ntawm cov khoom tiav, hauv cov khoom tshwj xeeb bakery, ntau yam phoov thiab dej qab zib. Nws yog siv rau hauv kev lag luam ntawm Coca-Cola.
Orthophosphoric acid siv los ntawm cov kws kho hniav thaum sau cov hniav mus rau txha hniav laus. Muaj ib qho ntsiab lus: cov kua qaub yuav tsum tsis txhob nyob twj ywm rau ntawm cov hniav tom qab etching, txwv tsis pub lub ntim yuav sai sai siv tsis tau. Tus kws kho mob yuav tsum tau muab nws tshem tawm ua ntej nqa mus.
Nrog kev pab los ntawm orthophosphoric acid, txheej txheej (varnishes, enamels) thiab cov ntaub ntawv (phosphate ua npuas) tau ua uas tiv taus kub. Ntoo tau kho nrog kev daws teeb meem ntawm cov kua qaub no hauv cov chaw ua haujlwm kom tiv thaiv nws ntawm kev hlawv.
Tau txais orthophosphoric acid
Hauv chav kuaj mob, phosphoric acid tuaj yeem yooj yim los ntawm kev cuam tshuam ntawm phosphorus nrog kev daws ntawm nitric acid (32%). Hauv kev lag luam, nws tau txais hauv ob txoj kev: rho tawm thiab thermal.
Lub ntsiab lus ntawm thawj txoj kev yog tias ntuj phosphates (phosphorus oxides) muaj kev cuam tshuam nrog ntau yam acids (sulfuric, nitric thiab lwm tus) los ua cov ntshiab orthophosphoric acid. Qhov txheej txheem thib ob yog kim dua los ntawm kev pom ntawm kev lag luam. Cov thev naus laus zis suav nrog kev sib txuas ntawm phosphorus, kev nqus ntawm nws cov oxide los ntawm dej, nrog rau kev ua kom tsis txhob hws thiab tom qab ntawd ntes cov roj.
Qhov mob ntawm phosphoric acid
Kev siv lub sijhawm ntev nrog cov khoom muaj cov tshuaj E338 ua rau muaj kev txhim kho kabmob xws li pob txha caj qaum thiab hniav lwj. Tus neeg cia li poob ceeb thawj, ntuav nquag los yog mob rau zaub mov tshwm sim. Phosphoric acid cuam tshuam cov kua qaub-puag ntawm lub cev. Dua li ntawm qhov no, nws txoj kev siv raws li kev noj haus kev noj haus tau raug cai nyob rau ntau lub tebchaws hauv ntiaj teb.
Phosphoric acid vapors tuaj yeem ua rau qhov ntswg ntawm lub qhov ntswg thiab qhov muag kub. Cov neeg ua haujlwm hauv cov chaw tsim khoom noj uas ua cov kua qaub no feem ntau muaj kev tiv thaiv daim siab, ua kom lub siab puas, thiab ua rau mob ntsws.
