Cov khoom lag luam
Sodium Metabisulfite (Tshuaj Mis Mis Na₂s₂o₅) yog hmoov dawb dawb nrog cov khoom muaj zog txo thiab muaj ntxhiab tsw. Nws tsuas yog txo hwj chim, antioxidant thiab tshuaj dawb tov los ntawm tso cov sulfur dioxide (so₂). Nyob rau hauv kev lag luam khoom noj khoom haus, nws yog dav siv rau kev khaws cia thiab cov txiv hmab txiv ntoo tshiab, kua txiv, inhiberming txoj kev loj hlob ntawm cov kab mob me thiab tiv thaiv browning. Nws yog siv los ua tus neeg saib xyuas tshuaj dawb hauv cov khoom qub starch thiab cov khoom qab zib los txhim kho xim. Ib qho ntxiv, nws tseem yog thov rau hauv cov tshuaj antioxidation, dej kho cov tshuaj lom thiab cov tshuaj lom neeg txo qis. Txawm hais tias nws txoj haujlwm ntau yam, nws siv yuav tsum ua raws cov qauv kev nyab xeeb. Cov neeg mob ntau dhau heev yuav ua rau cov neeg mob hawb pob) lossis rhuav tshem cov khoom noj khoom haus. Cov kev cai nyob rau ntau lub tebchaws muaj txwv rau cov neeg sawv ntawm cov sulfur
Kev piav txog
Cov Lus Qhia Yooj Yim
| Hom | Chaw ua uas tsis tau haus | Tus nqi / lus piav qhia | Hais lus |
|---|---|---|---|
| Cov ntaub ntawv yooj yim | Tshuaj lom neeg npe | Sodium Metabisulfite | - |
| Tshuaj Cov Qauv | Na augs₂o₅ | Muaj ob sodium ions thiab ib pab pawg disulfite (s₂o₅²⁻) | |
| Tus lej | 7681-57-4 | - | |
| Molecular hnyav | 190.10 g / mol | - | |
| Txheej Txheem Txheej Txheem Txheej Txheem | Cov Txheej Txheem Txheej Txheem ntawm Sodium Metabisulfite | Muaj li ntawm ob pab pawg txuas los ntawm cov neeg Sulphur-Sulphur Bond |
Cov Khoom Siv Lub Cev
| Hom | Chaw ua uas tsis tau haus | Tus nqi / lus piav qhia | Hais lus |
|---|---|---|---|
| Kev tshwm sim | Xim & Daim Ntawv | Dawb lossis me ntsis daj crystalline hmoov | Yooj yim oxidized thiab discolored thaum raug cua |
| Tus ntxhiab | - | Cov pungent sulgent sulfur dioxide (so₂) tsw | Ntau pom zoo nyob rau hauv cov chaw noo |
| So | Dej Solubility (20 degree) | 54 G / 100 ml dej | Aqueous kev daws yog acidic (ph 4-5) |
| Lwm yam ntawm cov tshuaj solubility | Me ntsis soluble hauv ethanol, insoluble hauv ether | - | |
| Ceev | Cov Nrig Nrig | 1.48 g / cm³ | - |
| Melting taw tes | - | 150 Qib (decomposes) | Tso tawm so₂ thiab nakso₃ thaum kev txiav txim siab |
| Ruaj khov | Hygroscopicity | HANGROSCOPIC HEEV, COV KHW LIM | Tso tawm ntxiv thaum decomposed hauv huab cua noo |
Tshuaj Tshuaj Muaj Zog
| Hom | Chaw ua uas tsis tau haus | Tus nqi / lus piav qhia | Hais lus |
|---|---|---|---|
| PHEEJ YEEM | Qhov Zoo Tshaj Plaws Ph | Acidic rau nruab nrab (PH 3-7) | Zoo nyob rau hauv ib puag ncig alkaline muaj zog |
| Kev xav tau | Ib qho tseem ceeb | Reacts siv zog nrog muaj cov muaj zog oxidizers (piv txwv li, clr,, h₂o₂), tso tawm | Zam kev sib cuag nrog oxidants thiab acids |
| Kev txiav txim siab | Thermal Decomposition | Produces SO₂ and Na₂SO₃ at high temperatures (>150 Qeb) | - |
Daim ntawv thov tseem ceeb tseem ceeb
Daim ntawv thov tsis
| Hom | Chaw ua uas tsis tau haus | Tus nqi / lus piav qhia | Hais lus |
|---|---|---|---|
| Kev Lag Luam Khoom Noj | Qhov siab tshaj plaws qis dua txwv (raws li so₂) | - Cov txiv hmab txiv ntoo qhuav: tsawg dua lossis sib npaug rau 0. 1 g / kg (Tuam Tshoj GB 2760) - cawv: tsawg dua lossis sib npaug nrog 250 mg / l (tus qauv thoob ntiaj teb) |
Yuav tsum tau sau npe tias yog "muaj cov sulfur dioxide" |
| Raug txais qib kev siv | - Khaws cia: {{0. {{{}} 1% -0.1% - Tshuaj dawb: {{0. 1% - 0. 5% |
Soaking sij hawm: 10-30 feeb rau cov txiv hmab txiv ntoo qhuav | |
| Chaw ua tshuaj paus | Antioxidant hauv kev txhaj tshuaj | 0.01%–0.05% | Yuav tsum ua raws li Suav Pharmacopoia Purity ntau dua los yog sib npaug rau 95% |
| Kev Kho Mob Dej | Dechlorination Dosage Piv | CLT: NAss₂o₅ ≈ 1: 0. 56 (los ntawm huab hwm coj) | Cov tshuaj tiv thaiv: CLT + NAss₂o₅ + h₂o → 2hcl + nakso₄ + hatso₃ |
| Tshuaj txo qis | Zas xim txo cov tshuaj | 1% -5% (los ntawm tag nrho cov txheej txheem huab hwm coj) | Feem ntau ua kom sov li 80-100 degree |
Kev Lag Luam Khoom Noj
Hauv kev lag luam khoom noj khoom haus, muaj cov cai nruj yuav tsum muaj rau cov ntsiab lus ntawm sodium metabisulfite. Cov kev xav tau feem ntau yog tsawg ({0}}}}}. 1%) lossis siab% rau 0.5%). Ntawm qhov ntau ntau, nws yog feem ntau siv rau kev khaws cia thiab cov hom phiaj ntawm cov tshuaj tiv thaiv kab mob siab, nws feem ntau yog siv rau cov khoom hmoov kom huv. Nws cov txheej txheem tsuas yog suav nrog kev sib ntxiv nrog, so noj / fumigation, thiab txau / zaj duab xis tshem tawm. Nyob rau hauv cov nqe lus ntawm daim ntawv thov, nws yog tsuas yog siv los ua tshuaj tiv thaiv thiab antioxidant (E223), ua tau zoo inhibiting txoj kev loj hlob ntawm cov kab mob me me (pwm, poov xab) thiab txuas lub txee txee. Nws kuj tseem siv tau los ua cov tshuaj dawb thiab feem ntau yog siv rau kev kho kom muaj piam thaj dawb thiab cov vermicelli thiab vermicelli). Cov xwm txheej tseem ceeb yog hauv cawv txiv hmab thiab txiv hmab txiv ntoo qhuav. Nws tuaj yeem pab ua kom zoo caw inhibit cov kab mob uas tsis muaj lwm yam, tiv thaiv nws cov kua qab, thiab pab cov txiv qhuav tiv thaiv pwm.
Tshuaj thiab Tshuaj pleev ib ce
Nyob rau hauv cov liaj teb ntawm cov tshuaj thiab cov tshuaj pleev ib ce, sodium metabisulfite yuav tsum muaj kev nyab xeeb ntau tshaj plaws vim tias cov tshuaj tsis zoo ({}}}}}}}}. 01% rau 0.1%). Nws cov txheej txheem cuam tshuam nws rau hauv ib puag ncig tsis muaj zog lossis siv nws ua ke nrog lwm cov stabilizers (xws li Edta). Ntawm chav kawm, ntxiv rau ua yeeb yam raws li antioxidant hauv cov tshuaj, nws kuj tuaj yeem siv rau cov tshuaj tua kab mob lossis cov tshuaj pleev ib ce.
Tshuaj lom neeg engineering thiab kev kho dej
Nyob rau hauv cov tshuaj lom neeg thiab muaj cov khoom lag luam, cov ntsiab lus xav tau rau sodium pyrosulfite tsis yog li nruj. Nws yog feem ntau hauv cov kev muaj zog siab (xws li 1% rau 10%) thiab tsuas yog siv los ua tus neeg sawv cev txo. Nws tuaj yeem koom haum zas synthesis, roj hmab vulcanization txiav thiab lwm yam kev tawm tsam. Cov txheej txheem yog los ntawm kev tiv thaiv kub. Piv txwv li, qhov kev lag luam Dow, nws yuav tsum tau ua kom sov rau ib qho kub thiab txias, xws li (80 mus rau 100 degree), los txhawb kev cuam tshuam ntau. Nws kuj tseem tuaj yeem ntxiv rau hauv cov batches. Raws li cov tshuaj tiv thaiv kev nce qib, nws tuaj yeem ntxiv rau ntau zaus los tswj cov tshuaj tiv thaiv kab mob.
Cov ntsiab lus xav tau ntawm sodium pyrosulfite hauv kev kho dej yog dynamically hloov raws li cov kab ke ntawm CLT: NAss₂o₅ ≈ 1: 0.56 thaum lub cev. Cov txheej txheem nyob nruab nrab ntawm cov kev siv tshuaj txhuam hniav txuas ntxiv thiab tuaj yeem tswj hwm cov nqi pov tseg hauv lub sijhawm ntawm lub sijhawm ntawm lub ntsuas hluav taws xob lossis hloov cov th. Cov tshuaj tiv thaiv xav tau yuav tsum tau nqa tawm hauv qab nruab nrab lossis tsis muaj zog acidic tej yam kev mob (pH 5-7) txhawm rau txhim kho cov kev ua kom zoo
Kev sib piv nrog lwm cov Sulfites
| Ntiag tug | Sodium Metabisulfite (NAss₂o₅) | Sodium sulfite (nausof) | Sodium Bisulfite (Naho₃) |
|---|---|---|---|
| So₂ cov ntsiab lus | Siab (67.4%) | Tsawg (50.8%) | Nruab Nrab (61.2%) |
| PHEEJ YEEM | Acidic rau nruab nrab | Nruab nrab rau alkaline | Tso acidic |
| Cov ntawv thov MAIN | Tshuaj Kho Khoom Noj Kom Nyab Xeeb, Kho Dej | Textile Dyeing, Ntawv tshuaj dawb | Cov Khoom Noj Khoom Haus Khaws Tseg (Cov Sij Hawm Cov Sij Hawm luv) |
Kev Nyab Xeeb thiab Toxicology
| Hom | Chaw ua uas tsis tau haus | Tus nqi / lus piav qhia | Hais lus |
|---|---|---|---|
| Cov ntaub ntawv lom | Mob siab rau qhov ncauj (LD₅₀, nas) | 820 mg / kg | Moderately lom |
| Kev Txwv Tsis Pub | Chaw Ua Haujlwm Huab Cua (OSHA) | So of concentration tsawg dua lossis sib npaug rau 5 ppm (8-} teev twa) | Siv lub ntsej muag roj hauv cov chaw muaj kev lag luam |
| Kev Noj Qab Haus Huv Kev Noj Qab Haus Huv | Cov phom sij loj | - ua rau lub qhov muag tsis sib xws, tawv nqaij, thiab ua pa - Tej zaum yuav ua rau muaj kev fab tshuaj ua xua hauv asthmatics |
Yaug tam sim ntawd nrog dej yog tias tiv tauj |
Kev Cia
| Hom | Chaw ua uas tsis tau haus | Tus nqi / lus piav qhia | Hais lus |
|---|---|---|---|
| Chaw ntim khoom | - | Khaws rau hauv qhov txias, qhuav, kaw cov xwm txheej, deb ntawm oxidants thiab acids | Pom zoo: txias dua los yog sib npaug rau 25 degree, rh tsawg dua lossis sib npaug rau 60% |
Epilogue
Daim ntawv thov ntawm Sodium Metabisulfite yuav tsum tau hloov kho tau yooj yim thiab cov txheej txheem raws li kev lag luam xav tau hauv ntau daim teb kom sib npaug thiab kev nyab xeeb. Piv txwv li, qhov sib txawv ntawm cov qis-concervation khaws cia hauv cov zaub mov thiab kev xav tau zoo ntawm kev lag luam "kev nyab xeeb ua ntej" thiab "ua thawj zaug ua ntej". Yog koj muaj lus nug, koj tuaj yeem sab Eastar. Peb tuaj yeem piav qhia lawv rau koj. Nyob rau tib lub sijhawm, peb xav qhia peb lub tuam txhab rau koj thaum kawg ntawm zaj duab xis. Eastar tau mob siab rau kev lag luam tshuaj tau ntau tshaj 20 xyoo thiab tau npaj txhij cov saw hlau nrog R & D, cov lus nug, Logistics thiab export. Peb tau cog lus los muab cov khoom lag luam zoo thiab cov kev pabcuam zoo. Peb siv zog ua ib qho khoom siv tsis zoo nrog cov cawv thoob ntiaj teb. Yog tias koj muaj kev xav tau, thov hu rau peb thiab peb yuav teb rau koj cov kev xav tau sai li sai tau.
