Teb ceev
Yog lawm, cyclohexanone tsis hloov pauv - tab sis tsuas yog nruab nrab xwb.Nws raug cais raws li kev lag luam hnyav hnyav, txhais tau tias nws evaporates ntawm chav tsev kub tab sis qeeb qeeb dua nrawm dua -evaporating cov kuab tshuaj xws li acetone lossis MEK.
Cov lej tseem ceeb piav qhia vim li cas:
- Boiling point:155.6℃- ntau dua acetone (56 degree)
- Vapor siab:kwv yees li 5.2 mmHg ntawm 25℃- kwv yees li 30-40 npaug qis dua acetone lub vapor siab
- Flash point:kwv yees li 44℃(kaw khob) - cais nws raws li ib tug combustible kua es ib tug heev flammable.
Vim tias qhov nruab nrab evaporation tus nqi,Cyclohexanoneyog dav siv nyob rau hauv daim ntawv thov uas yuav tsum tau tswj kom qhuav thiab tsim zaj duab xis es tsis instant flash -tawm. Qhov no suav nrogxim thiab txheej formulations, nylon (caprolactam thiab adipic acid) ntau lawm, resin thiab polymer manufacturing, thiab nplaum tshuab, qhov twg cov kuab tshuaj qeeb qeeb txhim kho qhov chaw tiav, adhesion, thiab kev tswj cov txheej txheem.
Rau cov neeg yuav khoom thiab cov neeg tsim khoom, "nruab nrab tsis hloov pauv" txhais ncaj qha rau hauv kev txiav txim siab: tus qauv ventilated cia es tsis yog lub tub yees cia, txheem flammable -kev faib khoom ua kua, thiab kwv yees kom qhuav / kho qhov rais hauv ntau lawm.
"Volatile" txhais li cas?
Hauv chemistry,volatilitypiav qhia txog qhov yooj yim npaum li cas cov kua hloov mus rau hauv vapor ntawm qhov ntsuas kub. Nws yog ib qho cuab yeej ntawm lub cev nkaus xwb uas khi tau yooj yim npaum li cas cov molecules khiav tawm cov kua saum npoo rau saum huab cua.
Nws yog ib qho tseem ceeb kom cais cov volatility ntawm ob lub zog nws feem ntau tsis meej pem nrog:
- Volatility tsis yog flammability.Cov kua tuaj yeem evaporate sai sai yam tsis muaj qhov tshwj xeeb yog flammable (los yog vice versa). Flammability nyob ntawm flash point thiab vapor flammability txwv, tsis yog evaporation tus nqi ib leeg.
- Volatility tsis yog toxicity.Cov tshuaj evaporates sai npaum li cas hais tsis muaj dab tsi ncaj qha txog qhov ua rau nws ua pa txaus ntshai npaum li cas. Ib qho qeeb - cov kua evaporating tseem tuaj yeem xav tau kev tiv thaiv ua pa, thiab ceev - evaporating ib qho yuav tsawg heev - muaj feem cuam tshuam rau qhov raug luv luv.
Volatility es tsis txhob teb cov lus nug nqaim, cov tswv yim:Cov kua dej no yuav xaus rau hauv huab cua ntau npaum li cas, thiab ceev npaum li cas?Cov cuab yeej ib leeg no ua rau muaj kev txiav txim siab txog qhov cua, lub thawv tsim, lub sij hawm ziab, thiab VOC (volatile organic compound) qhia - uas yog vim li cas nws tseem ceeb heev hauv kev yuav khoom thiab cov txheej txheem tsim.
Vim li cas Cyclhexanone thiaj suav hais tias tsis muaj zog?
Cyclohexanone zaum hauv nruab nrab ntawm qhov hnyav volatility spectrum, thiab ob lub cev lub cev piav qhia vim li cas.
Kub taw tes (155.6 degree).Boiling point yog qhov tseeb tshaj plaws ib qho kev kwv yees ntawm cov txheeb ze volatility ntawm cov kuab tshuaj zoo sib xws: qhov siab dua qhov boiling point, yuav tsum muaj zog ntau dua los hloov cov kua rau vapor, thiab qeeb evaporation tshwm sim ntawm chav tsev kub. Ntawm 155.6 degree, cyclohexanone lub boiling point yog ze li peb npaug ntawm acetone (56 degree) thiab yuav luag ob npaug ntawm toluene (111 degree).
Vapor siab (~ 5.2 mmHg ntawm 25 degree).Vapor siab ntsuas yuav ua li cas cov kua "them" molecules rau hauv cov huab cua ib puag ncig ntawm qhov kub thiab txias. Acetone lub vapor siab ntawm tib qhov kub yog nyob ib ncig ntawm 180–230 mmHg - ntau dua 30 npaug ntau dua. Cyclohexanone qhov sib piv qis vapor siab txhais tau tias tsawg dua cov molecules khiav tawm mus rau hauv huab cua ib chav tsev ntawm lub sijhawm, yog li qhov nchuav los yog qhib lub thawv tso tawm vapor maj mam es tsis txhob tawg sai.
Muab tso ua ke, ob qho khoom no piav qhia txog tus cwj pwm coj tus cwj pwm thiab cov neeg yuav khoom tau soj ntsuam: cyclohexanone evaporates qeeb qeeb dua li cov kuab tshuaj sai, tab sis nws tsis zaum hauv qeb "tsis muaj kev hloov pauv" uas nyob hauv siab - boiling glycols lossis plasticizers. Qhov chaw nruab nrab ntawd yog qhov tseeb vim li cas nws tau piav raws limoderately volatile.
cyclohexanone lub cev muaj zog
| Khoom | Tus nqi |
|---|---|
| Qhov tshwm sim | Tsis muaj xim rau daj ntseg- cov kua roj daj daj |
| tsw | Peppermint/acetone-zoo li |
| Molecular Luj | 98,14 g / mol |
| Boiling Point | 155.6 hli |
| Melting Point | -47 degree |
| Flash Point | ~ 44℃(kaw khob) |
| Vapor Siab | ~ 5.2 mmHg ntawm 25 degree |
| Qhov ntom | 0.947 g / mL ntawm 25 degree |
| Autoignition Kub | ~ 420 degree |
Cyclhexanone vs. Lwm cov kuab tshuaj
| Solvent | Boiling Point | kwv tij Volatility | Kev siv yam |
|---|---|---|---|
| Acetone | 56 degree | Siab heev | Ntxuav, ceev - cov txheej txheej qhuav |
| MEK (Methyl Ethyl Ketone) | 80 degree | Siab | Xim, nplaum |
| Ethyl Acetate | 77 degree | Siab | Printing inks, ntsia thawv khoom |
| Toluene | 111 degree | Nruab nrab-siab | Coatings, roj hmab cement |
| Cyclhexanone | 155.6 hli | Nruab nrab | Resins, nylon, coatings |
Cov qauv zoo ib yam: raws li qhov kub kub nce, evaporation qeeb thiab vapor siab poob. Cyclohexanone txoj hauj lwm - zoo tshaj qhov "ceev" cov kuab tshuaj tab sis hauv qab tiag tiag qis-volatility compounds zoo li glycol ethers - yog raws nraim qhov ua rau nws muaj txiaj ntsig qhov twg cov formulators xav tau sijhawm ua haujlwm, zaj duab xis -lub sijhawm ua haujlwm, lossis tswj kom qhuav, es tsis yog evaporation sai.
Vim li cas Volatility Matters hauv Industrial Purchasing
Rau kev yuav khoom thiab pab pawg kws tshaj lij, qhov hnyav qhov tsis hloov pauv tsis yog ib tus lej kuaj xwb - nws ncaj qha cov nqi, kev ua raws, thiab kev txiav txim siab txheej txheem:
- Cov cai cia khoom:Lub teeb nyem nyob ib ncig ntawm 44℃txhais tau hais tias cyclohexanone xav tau txias, zoo - tso cua tawm kom deb ntawm qhov hluav taws kub, tab sis tsis yog qhov tshwj xeeb hauv cov tub yees cia uas tsis tshua muaj hluav taws xob, qis -flash-point solvents xav tau.
- Shipping classification:Nws lub teeb nyem thiab vapor siab muab tso rau hauv cov qauv flammable - cov khoom thauj cov kua, uas cuam tshuam rau kev ntim khoom, daim ntawv lo, thiab cov khoom xa tuaj rau ob qho tib si hauv tsev thiab xa tawm.
- VOC kev txiav txim siab:Vim tias nws evaporates thiab ua rau muaj qhov tsis zoo ntawm cov organic compound emissions, kev siv cyclohexanone yog raws li VOC qhia thiab tswj cov kev cai hauv ntau qhov chaw txiav txim - ib qho tseem ceeb cov neeg yuav khoom yuav tsum lees paub tawm tsam cov cai hauv cheeb tsam.
- Txheej txheem kev ua haujlwm:Qhov nruab nrab volatility muab cov qauv qhib ntau lub sij hawm thaum daim ntawv thov (coatings, resin processing) ua ntej cov kuab tshuaj flashes tawm, txhim kho leveling, adhesion, thiab tiav zoo.
- Qhuav ceev:Cov evaporation qeeb dua txhais tau tias ntev dua ziab / kho lub voj voog piv nrog cov kuab tshuaj sai - kev lag luam -tawm kev npaj tsim khoom yuav tsum suav rau hauv kev teem sijhawm dhau los.
- Kev raug neeg ua haujlwm:Tsawg vapor siab feem ntau txhais tau hais tias qis dua ambient vapor concentration nyob rau hauv tib yam kev mob, tab sis raug txwv (xws li OSHA PELs) tseem siv tau thiab yuav tsum tau qhia qhov cua tsim.
Txoj Cai Kev Nyab Xeeb thiab Kev Cia Khoom
Kev tuav cyclohexanone muaj kev nyab xeeb ua raws li cov qauv kev ua haujlwm hnyav, qhia los ntawm OSHA thiab CDC / NIOSH cov lus qhia:
- Cov Khoom Siv Tiv Thaiv Tus Kheej (PPE):Tshuaj lom neeg- hnab looj tes tiv taus, looj tsom iav dub lossis daim npog ntsej muag, thiab cov khaub ncaws tiv thaiv raug pom zoo kom tiv thaiv daim tawv nqaij thiab qhov muag, uas tuaj yeem ua rau khaus.
- Qhov cua:Siv cov pa tso pa hauv zos lossis ua haujlwm hauv qhov zoo- qhov chaw cua kom ua kom cov pa pa tawm hauv qab qis dua qhov txwv tsis pub ua haujlwm.
- Cia kub:Khaws rau hauv qhov chaw txias, qhuav kom deb ntawm qhov chaw sov thiab tshav ntuj ncaj qha, kaw nruj nreem, corrosion-cov thawv uas tiv taus (feem ntau yog hlau lossis HDPE).
- Kev tiv thaiv hluav taws:Vim tias nws cov ntsiab lus flash cais nws raws li cov kua hluav taws xob / nplaim hluav taws xob, khaws nws kom deb ntawm cov nplaim taws, cov hluav taws xob, thiab cov khoom siv hluav taws xob zoo li qub, thiab khaws nws cais los ntawm cov muaj zog oxidizers.
- Spill response:Muaj cov khoom nchuav nrog cov khoom siv tsis zoo, ua kom lub qhov chaw kom tawg mus rau cov vapors, thiab tsis txhob muaj qhov hluav taws kub thaum ntxuav; pov tseg cov khoom pov tseg raws li kev nyab xeeb hauv zos - cov cai pov tseg.
Yuav Ua Li Cas Nruab Nrab Volatility Pab Tau Cov Ntawv Thov Kev Lag Luam
Cyclohexanone qhov tshwj xeeb volatility profile tsis yog qhov xwm txheej - nws yog ib qho laj thawj tseem ceeb uas cov compound raug xaiv sai dua - lossis qeeb dua -evaporating lwm txoj hauv kev lag luam:
- Xim thiab coatings:Nruab nrab evaporation muab cov xim zaj duab xis lub sij hawm mus rau theem thiab ntws ua ntej cov kuab tshuaj flashes tawm, txo cov defects xws li txiv kab ntxwv tev thiab txhim kho gloss thiab adhesion.
- Nylon ntau lawm:Raws li qhov tseem ceeb nruab nrab thiab cov txheej txheem hnyav hauv caprolactam thiab adipic acid manufacturing (precursors rau nylon 6 thiab nylon 6,6), nws tus cwj pwm ua kua ruaj khov ntawm cov txheej txheem kub txhawb kev tswj cov tshuaj tiv thaiv thiab kev sib cais.
- Adhesives:Tus nqi qis dua evaporation ncua sijhawm qhib / ua haujlwm, muab cov nplaum nplaum rau lub qhov rais ntev dua rau daim ntawv thov thiab kev sib txuas ua ntej cov kuab tshuaj tag nrho evaporates.
- Tshuaj tua kab thiab agrochemical formulations:Cyclohexanone's solvency power ua ke nrog cov tsis muaj zog nruab nrab pab cov khoom xyaw nquag nyob hauv cov tshuaj thaum lub sij hawm cia thaum tseem tso cai rau cov cab kuj hnyav kom evaporate kom tsim nyog tom qab thov.
FAQ
Puas yog cyclohexanone tsis hloov pauv?
Tsis yog. Cyclhexanone tsis hloov pauv. Nws qhov kub kub (155.6 degree) thiab vapor siab (~ 5.2 mmHg ntawm 25 degree) yog ob qho tib si deb ntawm cov siab -volatility solvents xws li acetone.
Puas yog cyclohexanone flammable?
Yog lawm, nws raug cais raws li cov kua hluav taws xob / hluav taws xob, nrog lub teeb nyem ntawm kwv yees li 44℃(kaw khob). Nws yuav tsum tau khaws cia kom deb ntawm tshav kub, sparks, thiab qhib nplaim taws.
Puas yog cyclohexanone evaporate sai?
Tsis nrawm piv rau cov kuab tshuaj sai sai. Nws evaporates ntawm chav tsev kub tab sis ntawm tus nqi qeeb dua li acetone, MEK, lossis ethyl acetate, vim nws qhov kub siab dua thiab qis dua vapor siab.
Puas yog cyclohexanone suav tias yog VOC?
Yog lawm, cyclohexanone feem ntau yog cais raws li cov organic sib xyaw ua ke thiab ua raws li VOC emission cov cai hauv ntau thaj tsam. Cov neeg yuav khoom yuav tsum lees paub cov kev cai tshwj xeeb nrog rau cov cai hauv cheeb tsam ib puag ncig.
Cyclohexanone puas tuaj yeem khaws cia hauv chav sov?
Yog lawm. Nrog lub melting point ntawm -47℃thiab lub boiling point ntawm 155.6 degree, nws tseem ruaj khov raws li ib tug kua nyob rau hauv ib txwm kub ambient kub, muab nws khaws cia nyob rau hauv ib tug txias, ventilated cheeb tsam deb ntawm ignition qhov chaw.
Yuav ua li cas cyclohexanone piv nrog acetone?
CyclhexanoneNws yog tsis tshua muaj volatile tshaj acetone. Nws cov ntsiab lus kub yog ze li peb npaug acetone's, thiab nws cov pa siab yog kwv yees li 30-40 npaug qis, txhais tau tias nws evaporates qeeb qeeb thiab muab sijhawm ua haujlwm ntev dua hauv cov qauv.
Yuav tsum thauj cyclohexanone li cas?
Vim nws lub ntsiab lus tseem ceeb, cyclohexanone raug xa mus ua cov kua hluav taws xob / hluav taws xob hluav taws xob raws li cov qauv tsim kev puas tsuaj - cov ntaub ntawv kev cai (piv txwv li UN 1915), xav tau cov ntawv sau tsim nyog, ntim khoom, thiab cov neeg nqa khoom ua raws rau kev thauj mus los hauv tebchaws thiab thoob ntiaj teb.