Sodium Hydrosulfite

Sodium hydrosulfite, tshuaj hu ua sodium bisulfite, ua haujlwm tseem ceeb, tseem ceeb txo tus neeg sawv cev hauv kev lag luam. Cov khoom no zoo nkaus li dawb mus rau greyish -dawb crystalline hmoov, unassuming nyob rau hauv tsos tsis tau harboring muaj zog tshuaj zog. Nws tus qauv txo qhov peev xwm nce mus txog kwv yees li -1.12V, tus yam ntxwv uas ua rau nws muaj peev xwm txo tau sai thiab muaj txiaj ntsig zoo. Nws cov txheej txheem tseem ceeb nyob hauv kev ntes cov pa oxygen los ntawm ib puag ncig sai thiab decomposing hauv cov tshuaj aqueous los tsim sodium bisulfite thaum tso tawm cov tshuaj "primordial hydrogen." Qhov no active hydrogen atom enables instantaneous teebmeem nyob rau hauv txo, bleaching, thiab decolorization txheej txheem, sai sai rhuav tshem chromophores los yog txo cov xim rau cov xim tsis muaj xim.

Tus nqi tseem ceeb ntawm sodium hydrosulfite nyob hauv nws tus nqi tshwj xeeb -kev ua tau zoo thiab kev ua haujlwm siab. Ntawm cov neeg ua haujlwm txo qis, nws muaj npe nrov rau nws cov tshuaj tiv thaiv sai, muaj zog txo lub zog, thiab tus nqi qis qis, ua rau nws qhov kev xaiv zoo tshaj plaws rau kev lag luam loj -. Txawm li cas los xij, qhov kev ua tau zoo no los nrog kev lag luam tawm -tawm: nws cov tshuaj muaj zog heev thiab tsis ruaj khov. Nws nthuav tawm qhov rhiab heev rau ya raws thiab huab cua. Thaum raug huab cua, cov hmoov ua tau sai sai absorbs noo noo, tsis tsuas yog clumping tab sis kuj tsim tshav kub thiab decomposing los ntawm cov tshuaj tiv thaiv nrog oxygen thiab dej. Qhov no ua rau muaj kev poob qis hauv cov khoom xyaw nquag thiab txawm tias muaj peev xwm ua rau muaj kev pheej hmoo thermal khiav. Yog li ntawd, nws qhov chaw cia khoom thiab kev thauj mus los yuav tsum nruj me ntsis raws li cov txheej txheem: nws yuav tsum tau muab ntim rau hauv cov pa oxygen-cov thawv cais (feem ntau ntim nrog nitrogen rau kev tiv thaiv), khaws cia rau hauv qhov txias txias, qhuav, zoo{10}}ventilated warehouses, khaws cia kom deb ntawm tshav kub thiab qhib nplaim taws, thiab hauv paus tiv thaiv los ntawm huab cua.

Hauv kev lag luam textile thiab dyeing kev lag luam ib txwm muaj thiab dav, sodium dithionite tuav lub luag haujlwm tseem ceeb, nws daim ntawv thov hla ntau cov txheej txheem tseem ceeb. Nyob rau hauv cov txheej txheem dyeing thiab luam ntawv ntawm kev txo cov dyes (xws li azo dyes), nws yog ib qho tseem ceeb ntawm "qhov tseem ceeb" - txo cov dej- txo cov dyes rau hauv cov dej soluble sodium ntsev ntawm cov xim tsis muaj xim, ua kom muaj fiber ntau adsorption, thiab tom qab ntawd rov ua kom lawv cov xim oxidation sai. Thaum dyeing defects tshwm sim, nws ua raws li "corrector." Raws li ib tug muaj zog decolorizer thiab bleaching neeg sawv cev, nws yog siv los kho dyeing defects nyob rau hauv cellulose fiber fabrics, re-dyeing reworked fabrics, thiab txawm pre- kho bleaching ntawm paj rwb ntaub. Nws zoo tshem cov xim ntawm cov ntaub tsis muaj kev puas tsuaj rau cov fibers. Tsis tas li ntawd, hauv cov khoom siv tshuaj fiber ntau-tshwj xeeb tshaj yog thaum tom qab- kho cov ntaub polyester-txo cov tshuaj ntxuav cov tshuaj formulated nrog sodium dithionite kom huv si tshem tawm "floating xim" tsim ntawm fiber ntau thaum lub sij hawm siab -kub dyeing thiab residual oligomers los ntawm cov txheej txheem alkali. Qhov no yog ib kauj ruam tseem ceeb rau kev txhim kho polyester ntaub colourfastness, ua tiav cov xim zoo nkauj, thiab muab lub ntsej muag zoo nkauj.

Nws daim ntawv thov txuas mus deb tshaj li textiles. Nyob rau hauv kev lag luam papermaking, nws ua hauj lwm raws li ib tug pulp bleaching neeg sawv cev, txhim kho pulp whiteness. Hauv kev lag luam khoom noj (yuav tsum tau ua zaub mov- qib specifications), nws ua haujlwm ua tus neeg ua haujlwm zoo rau decolorizing thiab purifying qab zib zoo li granulated qab zib. Hauv kev kho dej thev naus laus zis, nws muaj zog txo cov khoom tshem tawm cov pa oxygen los ntawm lub cev dej, tiv thaiv cov pa oxygen hauv cov tshuab xws li boilers. Txawm hais tias nyob rau hauv ib puag ncig kev tiv thaiv thiab cov peev txheej rov qab los, nws kho cov dej khib nyiab uas muaj cov hlau hnyav xws li chromium, txo cov tshuaj lom hexavalent chromium kom tsis muaj tshuaj lom trivalent chromium rau yav tom ntej los nag thiab tshem tawm.

Hauv cov ntsiab lus, sodium dithionite yog cov tshuaj classic uas sib xyaw ua haujlwm siab, tus nqi -kev ua tau zoo, thiab kev ua haujlwm tshwj xeeb. Nws daim ntawv thov keeb kwm dav dav nws tus kheej tau hais txog kev txhim kho kev lag luam niaj hnub, tshwj xeeb tshaj yog lub teeb textile sector. Thaum siv nws lub peev xwm loj heev, cov neeg siv yuav tsum muaj kev hwm tshaj plaws rau nws qhov kev tsis sib haum xeeb. Tsuas yog los ntawm cov txheej txheem khaws cia nruj me ntsis, cov txheej txheem ua haujlwm tau zoo, thiab cov phiaj xwm daws teeb meem thaum muaj xwm txheej ceev tuaj yeem siv lub zog tshuaj lom neeg muaj kev nyab xeeb kom tsis tu ncua xa tus nqi thoob plaws ntau yam kev lag luam.