CAS Tus lej p-Xylene yog dab tsi?
CAS tus naj npawb p-xylene yog 106-42-3. p-Xylene, tseem hu ua 1,4-dimethylbenzene, yog ib qho ntawm peb dimethylbenzene isomers nrog rau o-xylene thiab m-xylene. Nws yog ib qho aromatic hydrocarbon nrog cov mis mos molecular C8H10 thiab ib qho hnyav molecular txog 106.17. Lwm cov npe muaj xws li p-xylol thiab paraxylene. Cov khoom siv yog cov kua tsis muaj xim, flammable nrog cov yam ntxwv tsw qab, thiab nws yog ib qho tseem ceeb hauv lub tsev thaiv hauv kev lag luam petrochemical.
Lub cev muaj zog thiab kev txheeb xyuas qhov tseeb
Para-xylene yaj ntawm li 13 degrees Celsius thiab boils ntawm 138 degrees Celsius ntawm atmospheric siab. Nws qhov ceev yog kwv yees li 0.86 grams ib milliliter ntawm 20 degrees Celsius, uas txhais tau hais tias nws yog lighter tshaj dej. Nws yog xyaum insoluble hauv dej tab sis sib tov zoo nrog feem ntau cov organic solvents. Lub flash point ntawm p-xylene yog li ntawm 25 degrees Celsius, yog li cov kua tuaj yeem ignite yooj yim ntawm chav tsev kub thaum muaj qhov hluav taws kub. Cov khoom no txiav txim siab seb cov tshuaj yuav tsum tau khaws cia, thauj, thiab ua haujlwm li cas hauv cov chaw tsim khoom.
P-Xylene siv rau dab tsi?
Kev siv lub ntsiab ntawm p-xylene yog cov khoom noj khoom haus, los yog lub tsev thaiv, rau kev tsim lwm yam khoom siv tshuaj, tshwj xeeb tshaj yog terephthalic acid, purified terephthalic acid, thiab dimethyl terephthalate. Cov intermediates no tom qab ntawd hloov mus rau hauv polyethylene terephthalate, feem ntau hu ua PET, uas yog ib qho ntawm cov khoom siv polyester ntau tshaj plaws hauv ntiaj teb. PET yog siv los ua lub raj mis haus, ntim khoom noj, polyester fibers rau textiles, thiab ntim zaj duab xis. Tshaj li polyester ntau lawm, p-xylene kuj yog siv los ua cov kuab tshuaj hauv kev lag luam luam ntawv, roj hmab, thiab tawv.
Para-Xylene Ua li cas?
Para-xylene tau txais kev lag luam los ntawm kev sib xyaw xylene kwj uas yog tsim los ntawm kev hloov pauv catalytic ntawm naphtha. Peb xylene isomers thiab ethylbenzene yog sib cais los ntawm fractional distillation thiab tom qab ntawd los ntawm crystallization los yog xaiv adsorption siv molecular sieves, uas mloog zoo rau para isomer. Cov txheej txheem ntxiv xws li xylene isomerization thiab toluene disproportionation hloov dua siab tshiab isomers thiab toluene rau ntxiv p-xylene. Qhov kev sib xyaw ua ke ntawm kev sib cais thiab kev hloov pauv thev naus laus zis tso cai rau cov neeg tsim khoom kom ua tau raws li qhov xav tau purity siab ntawm polyester tus nqi saw.
Kev ruaj ntseg cia thiab tuav ntawm p-Xylene
Vim p-xylene yog nplaim taws thiab tuaj yeem tsim cov khoom sib xyaw nrog huab cua, qhov chaw cia yuav tsum txias, qhov cua zoo, thiab tsis muaj qhov hluav taws kub xws li qhib nplaim taws, taws, thiab qhov chaw kub. Cov thawv ntim khoom yuav tsum tau muab tso rau hauv av kom tsis txhob muaj hluav taws xob zoo li qub thaum hloov mus. Cov neeg ua haujlwm yuav tsum hnav cov khoom tiv thaiv tus kheej tsim nyog, suav nrog tshuaj lom neeg - hnab looj tes tiv thaiv thiab looj tsom iav, thiab yuav tsum tsis txhob ua pa tawm. Nyob rau hauv cov ntaub ntawv ntawm ib tug nchuav, lub cheeb tsam yuav tsum tau ventilated thiab cov kua absorbed nrog inert cov ntaub ntawv. Nco ntsoov sab laj nrog daim ntawv qhia kev nyab xeeb rau cov qib tshwj xeeb uas raug tswj xyuas thiab ua raws li cov cai hauv zos rau kev khaws cia thiab thauj.
Cov lus nug nquag
CAS tus lej p-xylene yog dab tsi?CAS tus lej p-xylene yog 106-42-3.
Puas yog p-xylene tib yam li xylene?Xylene yog sib xyaw ntawm peb isomers, thiab p-xylene yog para isomer, kuj hu ua 1,4-dimethylbenzene.
Vim li cas p-xylene tseem ceeb?Nws yog cov khoom noj tseem ceeb rau terephthalic acid thiab dimethyl terephthalate, uas yog siv los tsim PET polyester.
Puas yog p-xylene flammable?Yog lawm, p-xylene yog cov kua hluav taws xob uas muaj lub teeb nyem ze ntawm 25 degrees Celsius, yog li nws yuav tsum tau ceev kom deb ntawm qhov kub thiab qhov hluav taws kub.
Lwm lub npe ntawm p-xylene yog dab tsi?Nws tseem hu ua paraxylene, p-xylol, thiab 1,4-dimethylbenzene.
Puas yog p-xylene soluble hauv dej?Tsis yog, p-xylene yog xyaum tsis soluble hauv dej tab sis miscible nrog feem ntau cov organic solvents.