Oxalic acidyog cov organic.Daim ntawv tshuaj yog H₂C₂O₄.Nws yog cov khoom lag luam metabolic ntawm cov kab mob.Nws yog ob qho tib si tsis muaj zog acid.Nws yog dav faib nyob rau hauv cov nroj tsuag, tsiaj, thiab fungal lub cev.Nws ua haujlwm ntau yam hauv cov kab mob sib txawv.Yog li ntawd, oxalic acid feem ntau suav hais tias yog ib qho antagonist rau kev nqus thiab siv cov ntxhia hauv cov ntsiab lus.Nws cov anhydride yog carbon trioxide.
Yam ntxwv:Cov ntawv tsis muaj xim monoclinic lossis prismatic siv lead ua los yog hmoov dawb, oxalic acid tsw los ntawm oxidation, oxalic acid saj los ntawm kev sib txuas.Sublimation ntawm 150 ~ 160 ℃.Nws tuaj yeem ua rau huab cua kub qhuav.1g yog soluble hauv 7mL dej, 2mL boiling dej, 2.5mL ethanol, 1.8mL boiling ethanol, 100mL ether, 5.5mL glycerin, thiab insoluble nyob rau hauv benzene, chloroform thiab roj av ether.0.1mol / L tov muaj pH ntawm 1.3.Tus txheeb ze ntom ntom (dej = 1) yog 1.653.Melting point 189.5 ℃.
Chemical Properties:Oxalic acid, tseem hu ua glycolic acid, yog dav pom nyob rau hauv cov zaub mov cog.Oxalic acid yog cov xim tsis muaj kob uas tsis muaj xim, soluble hauv dej ntau dua li cov kuab tshuaj organic xws li ether,
Oxalate muaj kev sib koom tes muaj zog thiab yog lwm hom hlau chelating tus neeg sawv cev hauv cov zaub mov cog.Thaum oxalic acid ua ke nrog qee cov alkaline ntiaj teb hlau ntsiab lus, nws solubility txo qis heev, xws li calcium oxalate yuav luag insoluble hauv dej.Yog li ntawd, muaj oxalic acid muaj txiaj ntsig zoo rau bioavailability ntawm cov zaub mov tseem ceeb;Thaum oxalic acid ua ke nrog qee cov hlau hloov pauv, cov soluble complexes yog tsim los ntawm kev sib koom tes ntawm oxalic acid, thiab lawv cov solubility tau nce ntau.
Oxalic acid pib sublimate ntawm 100 ℃, sai sublimated ntawm 125 ℃, thiab sublimated sublimated ntawm 157 ℃, thiab pib decompose.
Cov tshuaj tiv thaiv nrog alkali, tuaj yeem tsim esterification, acyl halogenation, amide cov tshuaj tiv thaiv.Kev txo qis kuj tuaj yeem tshwm sim, thiab cov tshuaj tiv thaiv decarboxylation tuaj yeem tshwm sim hauv qab cua sov.Anhydrous oxalic acid yog hygroscopic.Oxalic acid tsim cov dej-soluble complexes nrog ntau cov hlau.
Feem ntau oxalate:1, Sodium oxalate; 2, Potassium oxalate; 3, Calcium oxalate; 4, Ferrous oxalate;5, Antimony oxalate;6, ammonium hydrogen oxalate;7, Magnesium oxalate 8, Lithium oxalate.
Daim ntawv thov:
1. Complexing agent, masking agent, precipitating agent, txo tus neeg sawv cev.Nws yog siv rau kev txiav txim siab ntawm beryllium, calcium, chromium, kub, manganese, strontium, thorium thiab lwm yam hlau ions.Picocrystal tsom xam rau sodium thiab lwm yam khoom.Precipitate calcium, magnesium, thorium thiab tsawg ntiaj teb cov ntsiab lus.Txoj kev daws teeb meem rau calibration ntawm poov tshuaj permanganate thiab cerous sulfate daws.Tshuaj dawb.Dye pab.Nws kuj tseem tuaj yeem siv los tshem tawm cov xeb ntawm cov khaub ncaws hauv kev lag luam hauv tsev ua ntej txhuam cov phab ntsa sab nrauv, vim tias cov phab ntsa alkaline muaj zog yuav tsum xub txhuam oxalic acid alkali.
2. Kev lag luam kws tshuaj siv hauv kev tsim cov tshuaj aureomycin, oxytetracycline, streptomycin, borneol, vitamin B12, phenobarbital thiab lwm yam tshuaj.Kev lag luam luam ntawv thiab dyeing siv los ua xim pab, tshuaj dawb, kev kho mob nruab nrab.Plastics kev lag luam rau zus tau tej cov PVC, amino plastics, urea - formaldehyde plastics.
3. Siv los ua ib qho catalyst rau phenolic resin synthesis, cov tshuaj tiv thaiv catalytic yog me me, cov txheej txheem kuj ruaj khov, thiab lub sijhawm ntev yog qhov ntev.Cov tshuaj Acetone oxalate tuaj yeem ua rau cov tshuaj tiv thaiv kho ntawm epoxy resin thiab txo lub sijhawm kho.Kuj tseem siv los ua hluavtaws urea formaldehyde resin, melamine formaldehyde resin pH regulator.Nws tseem tuaj yeem muab ntxiv rau hauv polyvinyl formaldehyde dej-soluble nplaum los txhim kho qhov ziab nrawm thiab kev sib khi lub zog.Kuj tseem siv los ua urea formaldehyde resin curing tus neeg saib xyuas, hlau ion chelating tus neeg saib xyuas.Nws tuaj yeem siv los ua kom nrawm rau kev npaj cov hmoov txhuv nplej siab nrog KMnO4 oxidant kom nrawm oxidation tus nqi thiab txo lub sijhawm cov tshuaj tiv thaiv.
Raws li ib tug bleaching agent:
Oxalic acid feem ntau yog siv los txo tus neeg sawv cev thiab tshuaj dawb, siv hauv kev tsim cov tshuaj tua kab mob thiab borneol thiab lwm yam tshuaj, nrog rau kev ua kom tsis tshua muaj hlau hnyav, tshuaj tua kab mob, tshuaj tua kab mob, thiab lwm yam.
Oxalic acid kuj tseem siv tau rau hauv kev tsim cov cobalt-molybdenum-aluminium catalysts, ntxuav cov hlau thiab marbles, thiab bleaching ntawm textiles.
Siv rau hlau nto tu thiab kho, tsis tshua muaj lub ntiaj teb lub ntsiab extraction, textile printing thiab dyeing, tawv ua, catalyst npaj, thiab lwm yam.
Raws li tus neeg sawv cev txo qis:
Hauv kev lag luam organic synthesis feem ntau yog siv hauv kev tsim cov hydroquinone, pentaerythritol, cobalt oxalate, npib tsib xee oxalate, gallic acid thiab lwm yam khoom siv tshuaj.
Plastics kev lag luam rau zus tau tej cov PVC, amino plastics, urea - formaldehyde plastics, xim, thiab lwm yam.
Dye kev lag luam yog siv los tsim cov hauv paus ntsuab thiab lwm yam.
Kev lag luam luam ntawv thiab dyeing tuaj yeem hloov acetic acid, siv los ua cov xim xim xim pab, tshuaj dawb.
Kev lag luam kws tshuaj rau kev tsim khoom ntawm aureomycin, tetracycline, streptomycin, ephedrine.
Tsis tas li ntawd, oxalic acid kuj tuaj yeem siv rau hauv kev sib txuas ntawm ntau yam oxalate ester, oxalate thiab oxalamide cov khoom, thiab diethyl oxalate, sodium oxalate, calcium oxalate thiab lwm yam khoom yog cov khoom tsim tau tshaj plaws.
Txoj kev khaws cia:
1. Muab ntim rau hauv qhov chaw qhuav thiab txias.nruj me ntsis noo-pov thawj, dej-pov thawj thiab hnub-pov thawj.Cia kub yuav tsum tsis pub tshaj 40 ℃.
2. Khaws kom deb ntawm cov oxides thiab alkaline.Siv polypropylene woven hnab lined nrog hnab yas, 25kg / hnab.
Zuag qhia tag nrho, oxalic acid yog ntau yam tshuaj uas muaj ntau yam kev siv hauv ntau hom kev lag luam.Nws cov khoom ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev tu, kho kom zoo thiab tshuaj dawb, thiab nws muaj ntau yam kev siv hauv kev lag luam textile, vaj thiab metalworking industries.Txawm li cas los xij, yuav tsum tau ceev faj txog kev nyab xeeb thaum siv cov tshuaj no, vim tias nws muaj tshuaj lom thiab tuaj yeem tsim kev puas tsuaj yog tias tsis ua haujlwm zoo.
Post lub sij hawm: May-30-2023