Acetic acid thiab glacial acetic acid yog tib yam tshuaj - CH₃COOH, CAS 64-19-7 - monobasic organic acid thiab cov ntsiab lus ntawm vinegar. Lawv sib koom ua ke chemistry (cov pawg carboxyl −COOH). Qhov txawv yog qhov concentration thiab lub cev lub cev, thiab nws tseem ceeb rau kev tuav, kev siv thiab kev nyab xeeb.
1. Vim li cas "Glacial"? - Lub Freezing Point
Glacial acetic acid yog qhov tseem ceeb tsis muaj dej acetic acid, feem ntau ntau dua lossis sib npaug li 99.5% ntshiab. Nws yog kua nyob rau hauv chav tsev kub; nws solidifies rau hauv dej khov-zoo li crystalline loj tsuas yog thaum txias hauv qab nws qhov chaw khov ntawm 16.6℃. Qhov ntawd crystalline, dej khov-zoo li zoo li qhov kub thiab txias yog lub hauv paus ntawm lub npe "glacial". Nyob rau hauv ib chav txias, glacial acetic acid yuav solidify nyob rau hauv nws lub thawv thiab yuav tsum tau maj mam warmed (tsis txhob qhib lub nplaim taws) ua ntej siv. Thawj daim ntawv thov tias glacial acetic acid yog cov khoom ntawm chav tsev kub tsis raug - chav tsev kub ib txwm zoo tshaj 16.6℃.
2. Kev Cuam Tshuam Thiab Lub Xeev Sib piv
| Parameter | Glacial acetic acid | Acetic acid (kev daws) |
|---|---|---|
| Nco ntsoov | Ntau dua lossis sib npaug li 99.5% (anhydrous) | 3% (khoom noj khoom haus vinegar) txog li ~ 30% lossis ntau dua (kev siv tshuab) |
| Lub xeev ntawm 20 degree | Kua (khov ntawm 16.6 degree) | Ua kua (kwv yees qis dua 0℃rau dilute daws) |
| Cov ntxhiab tsw / acidity | Pungent, nquag acidic | Vinegar-zoo li, me me mus rau nruab nrab |
| Corrosivity | Muaj zog corrosive - kub hnyiab ntawm daim tawv nqaij, qhov muag thiab pa | Me me ntawm cov zaub mov concentration; corrosive ntawm high technical concentrations |
3. Commercial Specification (Industrial Qib Glacial Acetic Acid)
| Yam khoom | Specification |
|---|---|
| Qhov tshwm sim | Tsis muaj xim, pob tshab kua, tsis muaj teeb meem tshem tawm |
| Assay (as CH₃COOH) | Ntau dua lossis sib npaug li 99.5% |
| Cov ntsiab lus dej | Tsawg dua lossis sib npaug li 0.3% |
| Xim (APHA) | Tsawg dua los yog sib npaug li 10 |
| Formic acid | Tsawg dua lossis sib npaug li 0.05% |
| Hlau (Fe) | Tsawg dua lossis sib npaug li 1 ppm |
| Ntim | 25kg / 200kg nruas, IBC tote, lossis ISO tank rau ntau |
4. Daim ntawv thov sib cais
Glacial acetic acid yog cov khoom siv tshuaj lom neeg: nws hloov mus rau hauv vinyl acetate monomer (rau polyvinyl acetate thiab polyvinyl cawv), acetic anhydride, acetate esters (solvents), cellulose acetate thiab purified terephthalic -acid intermediates, thiab yog siv nyob rau hauv tshuaj thiab tshuaj synthesis.Saib peb cov khoom lag luam glacial acetic acid rau cov qib thiab ntim khoom.
Dilute acetic acid pab zaub mov thiab siv tsev neeg: vinegar (3-5%) rau kev ua noj thiab khaws cia, ntxuav thiab tshem tawm cov kev daws teeb meem, thiab cov kev daws teeb meem me me hauv textile thiab yees duab ua.
5. Kev Nyab Xeeb - Kev Ceeb Toom Thaum Kub Kub Dilution
Diluting glacial acetic acid tso tawm cov cua kub tseem ceeb. Ib txwm ntxiv cov kua qaub rau hauv dej maj mam thaum nplawm - tsis txhob thim rov qab - thiab siv cov khoom tiv thaiv corrosion ({3}} iav, stainless hlau, lossis cov yas tsim nyog). Tuav glacial acetic acid nrog tsom iav, tshuaj lom neeg- hnab looj tes tiv taus thiab ua pa txaus; nws cov vapor yog mob heev rau qhov muag thiab ua pa, thiab cov kua ua rau tawv nqaij kub hnyiab heev.Xa mus rau glacial acetic acid SDS kom ua tiav kev tuav thiab raug- txwv cov ntaub ntawv.
6. Cia
Khaws glacial acetic acid nyob rau hauv lub thawv kaw nruj nreem kom deb ntawm oxidizers, muaj zog alkalis thiab qhov chaw ntawm tshav kub. Nyob rau hauv cov huab cua txias, cia siab tias yuav solidification hauv qab 16.6℃thiab sov ntim nyob rau hauv ib tug tswj hwm ua ntej siv. Sau kom meej meej thiab khaws cia cais ntawm cov khoom noj.
Cov lus nug nquag
Puas yog Glacial Acetic Acid zoo ib yam li Vinegar?
Tsis yog, txawm hais tias lawv muaj feem cuam tshuam txog tshuaj. Vinegar yog ib qho kev daws teeb meem ntawm acetic acid, feem ntau 3-5% concentration, thaum glacial acetic acid yog ze li ntawm ntshiab (Ntau dua los yog sib npaug rau 99.5%) thiab deb dhau corrosive thiab concentrated rau zaub mov siv yam tsis muaj qhov tseem ceeb dilution.
Vim li cas Glacial Acetic Acid khov?
Glacial acetic acid muaj qhov txias txias ntawm 16.6℃vim muaj zog hydrogen bonding ntawm molecules nyob ze - ntshiab, tsis muaj dej. Hauv qab no qhov kub thiab txias nws solidifies rau hauv dej khov -zoo li crystalline pawg, uas yog lub hauv paus chiv keeb ntawm lub npe "glacial."
Puas yog Glacial Acetic Acid txaus ntshai?
Yog lawm. Nws muaj zog corrosive thiab tuaj yeem ua rau tawv nqaij hnyav thiab qhov muag kub hnyiab, thiab nws cov vapor ua rau khaus khaus ua pa. Nws yuav tsum tau looj tsom iav dub, tshuaj lom neeg- hnab looj tes tiv thaiv thiab ua kom muaj cua txaus thaum tuav, thiab yuav tsum tau ntxiv rau dej - tsis txhob rov qab - thaum diluting.
Dab tsi Concentration yog Glacial Acetic Acid?
Glacial acetic acid feem ntau yog ntau dua los yog sib npaug rau 99.5% ntshiab, qhov tseem ceeb tsis muaj dej acetic acid, qhov txawv ntawm cov tshuaj dilute xws li zaub mov- qib vinegar (3-5%) los yog cov txheej txheem - qib acetic acid daws (txog li 30%).
Xav tau glacial acetic acid rau koj cov khoom? Hu rau peb pab neeg technical rau qibspecifications, COA, thiab bulk pricing.
