Sodium hypophosphite, yam ntxwv, ntau lawm, daim ntawv thov

2024 Tus sau: Angel Austin | [email protected]. Kawg hloov kho: 2023-12-17 05:28

Sodium phosphinate (NaPO₂H₂, tseem hu ua sodium hypophosphite) yog sodium ntsev ntawm hypophosphoric acid thiab feem ntau pom. as NaPO monohydrate ₂H₂H₂O. Nws yog ib yam khoom uas yog dawb, muaj ntxhiab tsw muaju nyob rau hauv chav tsev kub. Decomposes thaum rhuab saum 260 ° C.

Nws nqus dej noo los ntawm huab cua, thiab yooj yim soluble hauv dej, hauv cov tshuaj aqueous nws decomposes thaum cua sov (2NaH₂ PO _{2 → NaHPO}4_+PH3_{), tso tawm hydrogen peroxide. Sodium hypophosphite yuav tsum tau muab cia rau hauv qhov chaw txias, qhuav, cais los ntawm cov neeg ua haujlwm oxidizing. Decomposes rau hauv phosphine, uas irritates lub pa ib ntsuj av, thiab disodium phosphate.}

Ntse

Molar mass	87,96g/mol
Lub cev mob	kom txiav txim siab
density	1.77g/cm³
melting point	310 °C (decomposition ntawm monohydrate)
solubility	744 g/l ntawm 20°C soluble hauv ethanol

Tau txais

1. Koj tuaj yeem tau txais raws li hauv qab no:
2. Sodium phosphinate tuaj yeem tau txais los ntawm cov tshuaj tiv thaiv ntawm phosphorus dawb nrog caustic soda: Р ₄+3NaOH+3H₂O → Na2_HPO4_+PH3_{↑ (synthesis of sodium hypophosphite, formula).}
3. Oxidation ntawm phosphine nrog sodium hypochlorite: РН₃+2NaClO+NaOH→Na(РН₂O₂)+2NaCl+H₂O.
4. Decomposition of calcium phosphinate with sodium carbonate: Ca(PH₂O₂)+NaOH → Na(PH ₂ O₂)+CaCO₃↓.
5. Nws tuaj yeem npaj tau los ntawm kev ua kom tsis zoo hypophosphoric acid lossis calcium phosphinate tov nrog sodium carbonate: H(PH₂O₂) + NaOH →Na (PH₂O₂)+N₂O.

Nyob rau hauv cov tshuaj tiv thaiv hauv cov tshuaj aqueous, ib qho monohydrate yog tsim.

Siv

Scope:

1. Sodium hypophosphite (SHP) ua raws li tus neeg sawv cev txo kom muab cov hluav taws xob xav tau rau EN txheej txheem. Cov txheej txheem EN tso cai rau koj kom tau txais cov txheej txheem txheej tuab tsis yog ntawm cov khoom hlau, tab sis kuj ntawm cov yas thiab ceramics. Nrog rau txoj kev no, cov yeeb yaj kiab nickel-phosphorus ntev ntev tuaj yeem npog qhov tsis sib xws, xws li hauv avionics, aviation, thiabnyob rau hauv cov roj teb. SHP tuaj yeem txo cov nickel ions hauv kev daws rau cov hlau nickel ntawm cov hlau substrates nrog rau cov yas substrates. Cov tom kawg xav kom lub substrate tau qhib los ntawm cov khoom zoo palladium. Yog li ntawd, cov nyiaj npib tsib xee muaj txog li 15% phosphorus.
2. Raws li cov khoom siv raw hauv kev tsim cov khoom lag luam, suav nrog hypophosphorous acid. Nws tuaj yeem siv rau hauv cov khoom siv hluavtaws hluavtaws, tshwj xeeb tshaj yog nyob rau hauv deamination los ntawm kev txo cov diazo derivatives.
3. SHP tuaj yeem siv los ua tus txo qis lossis antioxidant hauv kev ua tshuaj.
4. SHP yog siv los ua tus stabilizer los tiv thaiv degradation ntawm polymers thaum extrusion los yog lwm yam kub ua hauj lwm.
5. Sodium phosphinate yog siv los ua Thiele reagent rau kev tshawb pom ntawm selenium.
6. Sodium hypophosphite tuaj yeem siv los ua cov nplaim hluav taws xob ib nrab. Qhov no yuav muab lub hauv paus ntawm electrons hauv resin regeneration.
7. Polymerization catalyst.
8. Polymer stabilizer.

He alth teebmeem

Kev ua xua ntawm daim tawv nqaij yuav tshwm sim hauv qee tus neeg tom qab rov ua dua daim tawv nqaij raug sodium hypophosphite. Cov ntaub ntawv ntxiv txog kev muaj peev xwm ua rau muaj kev phom sij rau tib neeg tsis muaj. Nws tsis ua rau tawv nqaij lossis qhov muag khaus hauv cov tsiaj kuaj. Tsis muaj tshuaj lom tau raug pom zoo nrog kev noj tshuaj ntawm qhov ncauj lossis qhov ncauj tawm ntawm qhov nruab nrab mus rau qhov siab.

Txo kev ua haujlwm tau pom nyob rau hauv cov tsiaj txhu uas raug rau qhov ncauj ntau heev ntawm sodium hypophosphite. Ib txhia tsiaj tuag. Tsis muaj cov tsos mob ntawm kev muaj menyuam, kev rho menyuam lossis kev yug menyuam tsis raug cai hauv cov tsiaj kuaj tom qab kis qhov ncauj ua ntej thiab / lossis thaum cev xeeb tub. Cov ntaub ntawv hais txog kev muaj peev xwm ua rau mob qog noj ntshav hauv cov tsiaj kuaj tsis muaj. Lub peev xwm ntawm sodium hypophosphite ua rau mob qog noj ntshav hauv tib neeg tsis tau raug soj ntsuam. Txawm li cas los xij, nws raug pom zoo kom siv cov cuab yeej tiv thaiv thaum tuav cov tshuaj.