Sodium Hydrosulfite 90%, Npaj Txhij Rau Kev Xa Khoom ~

Cov ntawv thov:
1. Kev siv sodium hydrosulfite yog dav heev, feem ntau suav nrog kev txo qis dyeing, txo kev ntxuav, luam ntawv thiab decolorization hauv kev lag luam textile, nrog rau kev ua kom dawb ntawm silk, wool, nylon thiab lwm yam ntaub. Vim tias sodium hydrosulfite tsis muaj cov hlau hnyav, cov xim ntawm cov ntaub bleached yog ci heev thiab tsis yooj yim ploj mus.

2. Sodium hydrosulfite kuj tseem siv tau rau kev ua kom cov khoom noj dawb, xws li gelatin, sucrose, txiv hmab txiv ntoo qab zib, thiab lwm yam, nrog rau xab npum, roj tsiaj (cog), xyoob, av nplaum dawb.

3. Hauv thaj chaw ntawm cov organic synthesis, sodium hydrosulfite yog siv los ua tus neeg sawv cev txo qis lossis tus neeg sawv cev dawb hauv kev tsim cov xim thiab tshuaj, tshwj xeeb tshaj yog ua tus neeg sawv cev dawb rau cov ntawv ntoo pulp.

4. Sodium hydrosulfite tuaj yeem txo ntau cov hlau hnyav xws li Pb2 +, Bi3 +, thiab lwm yam rau cov hlau hauv kev kho dej thiab kev tswj kev ua qias tuaj, thiab kuj tseem siv tau los khaws cov zaub mov thiab txiv hmab txiv ntoo.

Txaus ntshai
Ua tau hluav taws:Raws li cov qauv hauv tebchaws, sodium dithionite yog cov khoom siv hluav taws xob zoo tshaj plaws thaum ntub dej. Thaum nws kov dej, nws yuav ua rau muaj kev kub ntxhov, ua rau muaj cov pa roj uas yooj yim hlawv xws li hydrogen sulfide thiab sulfur dioxide, thiab tso tawm ntau qhov kub. Cov qauv tshuaj tiv thaiv yog: 2Na2S2O4 + 2H2O + O2 = 4NaHSO3, thiab cov khoom ntxiv ua rau muaj hydrogen sulfide thiab sulfur dioxide. Sodium dithionite muaj lub xeev nruab nrab ntawm sulfur, thiab nws cov khoom siv tshuaj lom neeg tsis ruaj khov. Nws qhia txog cov khoom txo qis muaj zog. Thaum nws ntsib cov kua qaub oxidizing muaj zog, xws li sulfuric acid, perchloric acid, nitric acid, phosphoric acid thiab lwm yam kua qaub muaj zog, ob qho tib si yuav dhau los ua qhov tshuaj tiv thaiv redox, thiab qhov tshuaj tiv thaiv yog ua rau muaj kev kub ntxhov, tso tawm ntau qhov kub thiab cov tshuaj lom. Nws cov qauv tshuaj tiv thaiv yog: 2Na2S2O4 + 4HCl = 2H2S2O4 + 4NaCl

Kev kub hnyiab sai sai:Sodium dithionite muaj qhov kub hnyiab ntawm 250 ℃. Vim nws qhov kub hnyiab qis, nws yog cov khoom siv hluav taws xob zoo tshaj plaws (qhov kub hnyiab feem ntau qis dua 300 ℃, thiab qhov kub hnyiab qis dua 100 ℃). Nws yooj yim hlawv thaum raug cua sov, hluav taws, kev sib txhuam thiab kev cuam tshuam. Qhov kub hnyiab ceev thiab muaj kev phom sij hluav taws kub. Cov roj hydrogen sulfide uas tsim tawm thaum lub sijhawm hlawv kuj tseem yuav ua rau thaj chaw hlawv loj dua, ua rau muaj kev phom sij hluav taws kub ntau dua.

Kev tawg:Sodium dithionite yog ib yam khoom daj daj me me uas zoo li hmoov av. Cov khoom no yooj yim ua rau muaj kev sib xyaw ua ke hauv huab cua. Kev tawg ntawm hmoov av tshwm sim thaum ntsib hluav taws. Cov khoom sib xyaw ntawm sodium dithionite thiab feem ntau cov tshuaj oxidants, xws li chlorates, nitrates, perchlorates, lossis permanganates, yog qhov tawg. Txawm tias nyob hauv dej, nws tawg tom qab kev sib txhuam me ntsis lossis kev sib tsoo, tshwj xeeb tshaj yog tom qab thermal decomposition, cov roj flammable tsim tom qab cov tshuaj tiv thaiv mus txog qhov txwv kev tawg, ces nws qhov kev phom sij ntawm kev tawg ntau dua.