Tetrachlorethylene thiab perchlorethylene yog tib yam tshuaj lom neeg. Tetrachlorethylene yog lub npe IUPAC lub npe, perchlorethylene yog lub npe lag luam ib txwm muaj, thiab cov ntawv luv PERC thiab PCE tau siv sib hloov pauv thoob plaws hauv kev lag luam. Lub npe hu ua tetrachloroethene kuj tseem siv hauv cov ntaub ntawv tshawb fawb. Lub compound tau sau npe nyob rau hauv CAS tus naj npawb 127-18-4 nrog cov mis molecular C2Cl4, thiab nws yog ib qho tseem ceeb tshaj plaws chlorinated cov kuab tshuaj nyob rau hauv kev lag luam siv, tshwj xeeb tshaj yog nyob rau hauv qhuav tu thiab industrial hlau degreasing.
Tib yam tshuaj, txawv npe
Ntau lub npe ntawm cov khoom no tuaj yeem cuam tshuam cov neeg yuav khoom thiab cov kws tshaj lij kev lag luam tshiab. Cov ntsiab lus hauv qab no tag nrho hais txog tib lub ntsiab lus:
Tetrachloroethylene, IUPAC -xav npe
Tetrachloroethene, lub npe systematic
Perchloroethylene, lub npe kev lag luam
Perchlorethylene, ib qho kev sau ntawv sib txawv
PERC thiab PCE, tus qauv luv luv
Thaum tus neeg muag khoom sau npe tetrachloroethylene, perchloroethylene, lossis PERC ntawm daim ntawv pov thawj ntawm kev tshuaj xyuas lossis daim ntawv pov thawj kev nyab xeeb, cov khoom siv zoo ib yam thiab nqa tib tus lej CAS 127-18-4.
Physical thiab Chemical Properties
Tetrachlorethylene yog cov xim tsis muaj xim, ntom, tsis muaj kuab lom nrog cov ntse, ether- zoo li tsw. Nws cov ntaub ntawv tseem ceeb ntawm lub cev yog:
CAS Nr .: 127-18-4
Cov mis mos molecular: C2Cl4
Molecular Luj: 165.83
Melting point: kwv yees li -22.4 ° C
Kub taw tes: kwv yees li 121 degrees Celsius
Qhov ceev: txog 1.62 g / mL ntawm 20 degrees Celsius
Vapor ceev: kwv yees li 5.83 npaug ntawm huab cua
Vapor siab: txog 1.9 kPa ntawm 20 degrees Celsius
Solubility hauv dej: tsawg heev, nyob rau hauv thaj tsam ntawm 0.02 g ib 100 mL
The high density and very low water solubility of PERC are important for both its industrial behavior and its environmental behavior, because released solvent tends to sink through soil and groundwater rather than dissipate.
Kev lag luam thiab kev lag luam
Ntxuav kom qhuav
PERC yog cov kuab tshuaj siv dav tshaj plaws hauv kev tu kom qhuav. Nws muaj zog solvency dissolves roj thiab roj yam tsis muaj kev puas tsuaj rau feem ntau fabrics, thiab nws tsis yog -flammable ua rau nws muaj kev ruaj ntseg nyob rau hauv lub tshuab ntxuav dua hydrocarbon solvents. Niaj hnub nimno kaw-loop qhuav tshuab ntxhua khaub ncaws rov qab thiab rov ua dua cov kuab tshuaj, txo ob qho emissions thiab cov nqi khiav lag luam.
Hlau Degreasing
Hauv kev lag luam automotive, aerospace, thiab metalworking industries, tetrachlorethylene yog siv los degrease hlau qhov chaw ua ntej machining, plating, painting, los yog sib dhos. Nws cov kuab tshuaj siab thiab lub sijhawm ziab sai ua rau nws zoo rau tshem tawm cov roj, waxes, thiab txiav cov kua dej los ntawm cov khoom precision.
Cov khoom siv thiab cov khoom tshwj xeeb
PERC tshwm nyob rau hauv ib qho kev txwv ntawm cov neeg siv khoom lag luam, suav nrog cov xim pleev xim, cov chaw tshem tawm, thiab qee cov khoom siv nplaum. Nws kuj yog siv los ua cov tshuaj tiv thaiv hnyav thiab ua ib qho kev rho tawm hauv kev tsim tshuaj.
Kev noj qab haus huv, kev nyab xeeb, thiab kev xav txog ib puag ncig
Vim tias PERC yog cov organic sib xyaw ua ke nrog cov teebmeem kev noj qab haus huv, kev tswj hwm nruj yuav tsum tau ua hauv chaw ua haujlwm thiab chaw tsim khoom:
Inhalation hazard: vapors tuaj yeem ua rau kiv taub hau, mob taub hau, thiab hauv nruab nrab lub paj hlwb kev nyuaj siab ntawm qhov siab, thiab ntev raug cuam tshuam nrog kev cuam tshuam ntawm neurological.
Kev faib tawm mob qog noj ntshav: tetrachlorethylene raug cais raws li qhov tshwm sim ntawm tib neeg cov kab mob carcinogen los ntawm ntau tus neeg saib xyuas kev noj qab haus huv, yog li yuav tsum raug txo kom tsawg.
Cov tawv nqaij thiab qhov muag sib cuag: cov kuab tshuaj tuaj yeem ua rau tawv nqaij thiab ua rau khaus ntawm kev sib cuag ncaj qha
Kev coj tus cwj pwm ib puag ncig: kev tso tawm tuaj yeem paug cov av thiab dej hauv av, thiab PERC yog ib qho kev tswj hwm cov pa phem hauv ntau lub tebchaws.
Engineering tswj: siv kaw tshuab, tso pa tawm hauv zos, vapor rov qab, thiab kev tswj kom zoo los tswj cov emissions
Kev tiv thaiv tus kheej: hnav tshuaj lom neeg- hnab looj tes tiv thaiv, tsom iav, thiab kev tiv thaiv ua pa kom tsim nyog qhov twg muaj vapor raug
Hauv kev teb rau cov kev txhawj xeeb no, kev lag luam tu qhuav hauv ntau thaj tsam tau hloov pauv mus rau lwm cov thev naus laus zis thiab txhim kho cov tshuab uas txo qis kev siv PERC thiab emissions, thaum cov hlau ntxuav kev lag luam nce kev ntsuas aqueous thiab lwm lub tshuab.
Kev khaws cia thiab kev txiav txim siab zoo rau cov neeg yuav khoom
Cov neeg siv khoom lag luam yuav tsum qhia cov qib, feem ntau qhuav- qib tu lossis qib kev lag luam, thiab thov kom muaj daim ntawv pov thawj ntawm kev tshuaj xyuas suav nrog tus nqi ntsuas, acidity, dej cov ntsiab lus, thiab tsis yog -volatile residue. PERC yuav tsum tau muab khaws cia rau hauv qhov chaw kaw, corrosion-cov thawv uas tiv taus kom deb ntawm cov oxidizers uas muaj zog, thiab cov kuab tshuaj pov tseg yuav tsum tau ua los ntawm cov kev pab cuam rov qab los yog pov tseg. Cov neeg muag khoom yuav tsum muab cov ntaub ntawv kev nyab xeeb tam sim no thiab, yog tias xav tau, cov ntaub ntawv txaus ntshai rau kev thauj mus los.
Cov lus nug nquag
Puas yog tetrachlorethylene tib yam li perchloroethylene?Yog lawm. Lawv yog ob lub npe rau tib yam tshuaj, C2Cl4, nrog rau CAS tus lej 127-18-4. PERC thiab PCE yog cov ntawv luv luv.
PERC siv rau dab tsi?PERC feem ntau yog siv los ua cov tshuaj ntxuav kom qhuav thiab ua cov hlau degreasing hnyav hauv kev lag luam tsheb thiab hlau, nrog rau kev siv me me hauv cov xim strippers thiab cov chaw tshem tawm.
CAS tus naj npawb ntawm tetrachloroethylene yog dab tsi?CAS npe ntawm tetrachlorethylene yog 127-18-4.
Puas yog tetrachlorethylene flammable?Tetrachlorethylene tsis yog flammable nyob rau hauv ib txwm tej yam kev mob, uas yog ib tug yog vim li cas nws yog siv nyob rau hauv qhuav tu. Txawm li cas los xij, nws tuaj yeem decompose ntawm qhov kub thiab txias thiab yuav tsum tau khaws cia kom deb ntawm qhov chaw kub thiab qhib nplaim taws.
Dab tsi yog kev phom sij rau kev noj qab haus huv ntawm perchloroethylene?Kev cuam tshuam rau PERC vapors tuaj yeem ua rau kiv taub hau, mob taub hau, thiab lub hauv nruab nrab lub paj hlwb cuam tshuam, thiab qhov ntev - raug cuam tshuam nrog kev pheej hmoo mob qog noj ntshav, yog li kev tso pa tawm thiab kev tiv thaiv raug yog qhov tseem ceeb.
Puas yog tetrachlorethylene soluble hauv dej?No. Its solubility in water is extremely low, around 0.02 g per 100 mL, and the dense solvent tends to sink below water, which is a key factor in soil and groundwater contamination risks.