Vim li cas rau daj ntawm cov hnab looj tes nitrile
Tsis ntev los no, cov neeg ua haujlwm hauv cov kev lag luam plua plav tau hu peb los nug txog cov khoom siv rau cov khoom siv nitrile: vim li cas rau lub hnab tawv nqaij ntawm nitric acid hnab hauv chav huv.
Peb paub hais tias acrylonitrile (AN) yog ib qho ntawm cov kabmob loj polymerization rau cov khoom ntawm cov khoom polymer xws li cov hnab looj tes nitrile. Qhov zoo ntawm acrylonitrile ncaj qha cuam tshuam cov kev ua tau zoo ntawm nws cov khoom tiav tom qab, ntawm cov ntsiab lus ntawm oxazole nyob rau hauv acrylonitrile yog qhov tseem. Lub ntsiab yog tias nws tsis tsuas cuam tshuam cov xim thiab kev ruaj ntseg ntawm acrylonitrile, tab sis kuj xim ntawm cov khoom polymer tom qab synthesis. Cov ntaub ntawv ntsuam xyuas tau pom tias oxazole cov ntsiab lus ntawm acrylonitrile ntau tshaj 75mg / kg yuav ua rau qee qhov tshuaj lom neeg ntawm acrylonitrile. Uas yog hais tias, yog hais tias cov ntsiab lus ntawm acrylonitrile oxazole nyob rau hauv lub hnab tsho tshaj li tus qauv, yellowing yuav tshwm sim. Ua ntej, muaj ib qho teeb meem nrog cov xim ntawm cov khoom tiav. Qhov ob, cov xim yuav hloov tom qab lub sijhawm khaws cia.
Yuav ua li cas los soj ntsuam cov ntsiab lus ntawm oxazole nyob rau hauv acrylonitrile thiab dab tsi yog txoj kev?
Cov feem ntau yog cov tshuaj lom neeg, spectroscopy thiab chromatography, tab sis qhov siv tau zoo tshaj plaws yog siv roj-spectrometry (GC-MS). Hauv kev sim no, cov kab capillary uas yog tsim rau kev ntsuam xyuas ntawm cov kab mob oxazole thiab lwm cov impurities hauv acrylonitrile kuaj, thiab cov oxazole tau txiav txim siab los ntawm cov pa roj carbon ntau spectrometry (GC-MS). Cov tshuaj siv tshuaj yog siv los kuaj xyuas cov naj npawb zoo. Qhov loj qhov tseem ceeb ntawm oxazole yog xam los ntawm tus qauv thiab quantified los ntawm cov txheej txheem. Cov txheej txheem yog siv rau kev txo cov ntsiab lus ntawm oxazole hauv acrylonitrile los ntawm hnab looj tes ua lag luam thiab petrochemical tuam txhab uas muag, thiab ua haujlwm tau zoo qhov teeb meem ntawm acrylonitrile polymerization khoom - nitrile thiab acrylic yellowing, thiab cov nyhuv yog txaus siab.
Cov qauv no yog siv rau txoj kev tshawb fawb ntawm qhov ua rau daj ntawm nitrile hauv domestic kev lag luam. Cov ntsiab lus oxazole raw khoom acrylonitrile yog siab, li 0.03% ~ 0.12%. Raws li cov ntaub ntawv soj ntsuam,
Tam sim no, peb lub tuam txhab tau hloov cov kab mob thiab cov txheej txheem ntawm cov tshuaj acrylonitrile. Tom qab qhov kev hloov kho, cov oxazole cov ntsiab lus hauv acrylonitrile yog txo kom tsawg tshaj li 0.007%, thiab cov chromaticity ntawm acrylonitrile txo ntawm 45 mus rau 48 ~ rau tsawg dua 20. Tom qab kev hloov kho acrylonitrile refined, Lub chromaticity ntawm acrylonitrile polymer acrylic fiber ntau los ntawm 0.24 ~ 0.27 rau 0.10 ~ 0.11, uas txaus siab daws qhov teeb meem zoo ntawm acrylic yellowing thiab tau txais txiaj ntsim zoo.
Hauv cov ntsiab lus, muaj ntau hom oxazole hauv cov khoom siv acrylonitrile rau cov hnab looj tes, thiab ntau dua cov ntsiab lus, ntau qhov kev ua tau zoo thiab cov xim ntawm qhov khoom zaum kawg yuav raug cuam tshuam. Yog li yuav ua li cas tswj cov ntsiab lus ntawm oxazole yog ib qho tseem ceeb heev.
Qhov saum toj no yog qhov muag daj ntawm cov hnab looj tes nitrile, Kuv vam tias yuav pab txhua tus!