Txhua hnub, koj siv ntawv, hnav khaub ncaws, haus dej, noj noodles, thiab tej zaum tsav tsheb. Tom qab tag nrho cov no yog ib qho yooj yim chemical raw khoom. Nws tsis tshwm sim ntawm cov neeg siv khoom cov ntawv sau, tab sis nws khiav los ntawm cov txheej txheem tsim khoom ntawm yuav luag txhua qhov kev lag luam. Nws yog sodium hydroxide - feem ntau hu ua caustic soda, lye, los yog caustic alkali, nrog rau cov tshuaj formula NaOH.
Cov tshuaj no, feem ntau hu ua "universal alkali," txhawb peb lub neej niaj hnub no li cas? Cia wb mus saib ntxiv.
1. Los ntawm xab npum mus rau daim ntawv: Kev siv qub, feem ntau siv niaj hnub
Sodium hydroxide lub luag haujlwm tseem ceeb tshaj plaws yog lub luag haujlwm tseem ceeb hauv kev tsim cov xab npum. Cov rog thiab roj hnov mob nrog sodium hydroxide hauv saponification cov tshuaj tiv thaiv los tsim sodium fatty acid (lub ntsiab ntawm xab npum) thiab glycerol. Tib neeg tau siv cov tshuaj tiv thaiv no rau ntau txhiab xyoo, thiab nws tseem yog lub hauv paus ntawm kev lag luam xab npum niaj hnub no. Hauv kev tsim cov xab npum niaj hnub no, sodium hydroxide yog siv los ua cov xab npum tawv los ntawm kev ntxiv me ntsis roj lossis roj (2-3%) rau cov tshuaj alkali hauv lub nkoj saponification, tswj qhov kub thiab txias kom paub meej cov tshuaj tiv thaiv.
Tab sis xab npum tsuas yog qhov pib xwb. Kev lag luam ntawv siv txawm tias qhov ntau ntawm sodium hydroxide. Cov ntaub ntawv raw yog los ntawm ntoo lossis nyom, uas tsis tsuas yog cellulose xwb tab sis kuj muaj ntau ntawm lignin, cov pos hniav, thiab lwm yam tsis yog - cellulose Cheebtsam. Sodium hydroxide kua dissolves thiab cais cov tsis yog - cellulose Cheebtsam, tsim cellulose-raws li pulp. Txhua daim ntawv, hauv kev nkag siab, muaj sodium hydroxide koom nrog hauv nws cov txheej txheem "ua noj" thiab "bleaching".
Kev lag luam textile kuj nyob ntawm nws. Thaum cov ntaub paj rwb raug kho nrog cov tshuaj sodium hydroxide, cov waxes saum npoo, cov roj, thiab cov hmoov txhuv nplej siab raug tshem tawm, thaum cov ntaub mercerized luster yog txhim kho thiab dyeing yuav zoo ib yam - txheej txheem hu ua "mercerization." Kev tsim cov rayon, paj rwb, thiab lwm yam viscose fibers kuj yuav tsum tau soaking cellulose pulp nyob rau hauv sodium hydroxide tov los hloov nws mus rau hauv alkali cellulose, uas yog ces ua rau fibers.
2. Los ntawm Bauxite mus rau Aluminium Cov Khoom: Koj Lub Tsheb Caij Nyoog pib ntawm no
Yog tias xab npum thiab ntawv yog sodium hydroxide "ib thaj chaw ib txwm muaj," ces metallurgy yog qhov piv txwv ntawm nws "tsis pom kev txhawb nqa."
95% ntawm lub ntiaj teb cov tuam txhab txhuas siv cov txheej txheem hu ua "Bayer txheej txheem" kom rho tawm alumina los ntawm bauxite, thiab cov tub ntxhais ntawm cov txheej txheem Bayer yog yaj bauxite nrog concentrated sodium hydroxide tov. Tshwj xeeb, alumina nyob rau hauv bauxite yog hloov mus rau hauv soluble sodium aluminate nyob rau hauv qhov kev txiav txim ntawm sodium hydroxide, thaum impurities xws li hlau thiab titanium daim ntawv insoluble "liab av" uas yog lim tawm. Tom qab ntawd, los ntawm kev ua kom txias, dilution, thiab ntxiv cov noob muaju, aluminium hydroxide re-precipitates, thiab tom qab calcination, alumina tau txais, uas yog thaum kawg electrolyzed rau hauv metallic aluminium.
Lub tsheb lub cev hnyav, lub khob haus dej, lub qhov rais aluminium alloy qhov rai thav duab - lawv "tus kheej qub" tau dhau los ntawm kev sib cais thiab kev yug dua tshiab hauv cov tshuaj sodium hydroxide. Nyob rau hauv 2026, lub ntiaj teb no alumina smelting kev lag luam yuav tsum tau noj ib feem tseem ceeb ntawm tag nrho cov sodium hydroxide noj, txhawb kev lag luam txhuas saw muaj nqis ntau pua billions.
3. Los ntawm Dej Haus rau Khoom Noj: Qhov Tsis Pom Zoo "Tus Pabcuam Ua Haujlwm"
Sodium hydroxide plays lub luag haujlwm tseem ceeb hauv kev kho dej. Nws tuaj yeem kho pH, tshem tawm cov dej khib nyiab, tshem tawm cov impurities ntawm dej, thiab ua haujlwm nrog flocculants los txhim kho kev ua kom huv. Kev kho dej hauv nroog thiab kev tsim cov dej khib nyiab pov tseg ob qho tib si cia siab rau sodium hydroxide kom tswj tau cov dej zoo.
Hauv cov khoom noj khoom haus, zaub mov -qib sodium hydroxide raug tswj nruj raws li kev pabcuam ua haujlwm. Nws tuaj yeem siv rau hauv kev kho dej alkaline ntawm noodles thiab alkaline nplej dumplings, nrog rau hauv cov txiv hmab txiv ntoo citrus, txiv duaj, thiab lwm yam txiv hmab txiv ntoo, thiab ntxuav cov kaus poom thiab lub raj mis. Qhov kev ntxhib los mos ntawm qee cov khoom lag luam pasta thiab kev huv ntawm qee lub ntim dej haus ob qho tib si koom nrog zaub mov - qib sodium hydroxide. Tau kawg, tag nrho cov no yuav tsum tau ua raws li qhov txwv tau teev tseg los ntawm cov qauv hauv tebchaws - kev siv ntau dhau yog txhaum cai.
4. Los ntawm cov tshuaj mus rau lub zog tshiab: Daim ntawv qhia nthuav dav
Sodium hydroxide yog cov khoom siv raw rau kev lag luam tshuaj, siv los tsim borax, sodium cyanide, formic acid, oxalic acid, phenol, thiab ntau lwm yam tshuaj. Hauv kev lag luam tshuaj, nws yog ib qho tseem ceeb raw cov ntaub ntawv rau synthesizing aspirin, salicylic acid, thiab sulfonamide tshuaj. Hauv cov roj av refining, sodium hydroxide tov yog siv los ntxuav cov kua qaub los ntawm cov khoom siv roj av kom tau raws li cov qauv kev ua kom zoo.
Tshwj xeeb tshaj yog, sodium hydroxide daim ntawv thov daim ntawv qhia yog txuas mus rau lub zog tshiab. Kev tsim cov lithium roj teeb cathode cov khoom ua ntej thiab kev ntxuav ntawm cov iav photovoltaic ob leeg yuav tsum tau sodium hydroxide. Xyoo 2025, kev siv sodium hydroxide hauv lub zog tshiab- thaj chaw muaj feem cuam tshuam tau nce los ntawm 21%, dhau los ua ib qho ntawm cov ntawv thov loj tshaj plaws - ntu ntu. Nrog rau kev nthuav dav ntawm lub tsheb hluav taws xob thiab lub zog cia kev lag luam, cov tshuaj "qub" no tau txais txiaj ntsig tshiab.
5. A "Paradox": Indispensable, Tseem yuav tsum tau hwm
Sodium hydroxide hu ua "universal alkali" tsis yog vim nws siv ntau yam, tab sis kuj vim nws yog ib qho tseem ceeb "platform chemical" - nws tsis ncaj qha tsim cov khoom kawg nws tus kheej, tsis tau nws ua rau kev tsim cov khoom suav tsis tau.
Tab sis nws lwm sab yog qhov tseem ceeb sib npaug. Sodium hydroxide yog corrosive heev thiab tuaj yeem ua rau kub hnyiab rau ntawm daim tawv nqaij thiab qhov muag. Thaum cov khoom siv sodium hydroxide yaj hauv dej, nws tso tawm ntau cov cua sov, thiab cov txheej txheem ua haujlwm tsis raug tuaj yeem ua rau kub hnyiab thiab txaws. Thaum lub sij hawm cia, nws yuav tsum tau muab kaw kom tsis txhob ya raws, khaws cia kom deb ntawm cov kua qaub thiab hlau xws li txhuas thiab zinc, thiab yuav tsum tsis txhob siv iav stoppers (nws reacts nrog silicon dioxide nyob rau hauv iav, ua rau lub stopper lo).
Nws yog qhov kev sib koom ua ke ntawm "qhov tseem ceeb" thiab "yuav tsum tau hwm" uas txhais tau tias sodium hydroxide txoj hauj lwm hauv kev lag luam niaj hnub no. Nws ntsiag to txhawb cov saw hlau loj los ntawm cov khoom siv niaj hnub mus rau siab - kev tsim khoom kawg, tsis tau nws ib txwm raug kho nrog cov cai nruj nruj.
Los ntawm cov tshuaj tiv thaiv saponification nyob rau hauv xab npum mus rau lub dissolution ntawm bauxite; los ntawm kev ua noj ntawm daim ntawv mus rau purification ntawm dej; los ntawm kev ua cov nplej zom mus rau kev tsim cov roj teeb lithium - sodium hydroxide khiav los ntawm yuav luag txhua yam ntawm lub neej niaj hnub no. Nws tsis sawv hauv qhov tsom teeb, tsis tau nws sawv ntawm qhov chaw pib ntawm suav tsis txheeb kev lag luam chains. Qhov ntawd yog lub ntsiab lus tseeb ntawm "universal alkali": tsis yog tias nws tuaj yeem ua tau txhua yam, tab sis yog tias tsis muaj nws, lub neej niaj hnub no yuav ua tsis tau.
