Qhov sib txawv tseem ceeb ntawm O-xylene thiab P-xylene yog tias O-xylene muaj ob pawg methyl txuas rau lub nplhaib benzene ntawm qhov chaw uas nyob ib sab, qhov P-xylene muaj ob pawg methyl txuas rau lub nplhaib benzene ntawm qhov sib txawv. Cov haujlwm hloov pauv.
Y Xylene yog ib qho organic compound. Nws yog ib qho ntawm peb isomers ntawm dimethylbenzene. Nws muaj ob pawg methyl txuas rau lub nplhaib benzene ntawm ntau txoj haujlwm. Cov tshuaj formula ntawm xylene yog (CH
3)2C6H4 Peb lub isomers ntawm dimethylbenzene yog ortho-xylene, para-xylene thiab meta-xylene.
O-Xylene yog dab tsi?
o-Xylene yog ib qho isomer ntawm dimethylbenzene nyob rau hauv uas ob pawg methyl txuas mus rau lwm qhov chaw hloov chaw. Yog tias muaj ob qhov hloov pauv txuas rau ob qhov sib txuas ntawm carbon atoms ntawm benzene, peb hu qhov kev teeb tsa no "ortho" configuration. Yog li ntawd, lub npe O-xylene los ntawm lub npe "ortho-xylene". Qhov no yog ib txoj cai isomer ntawm para thiab meta configurations ntawm dimethylbenzene. O-xylene tshwm sim ua kua nyob rau hauv chav tsev kub. Nws yog cov kua uas tsis muaj xim uas yog oily me ntsis thiab flammable.
Daim duab 01: Cov qauv ntawm O-xylene
Peb tuaj yeem tsim O-xylene los ntawm cov roj av tawg. Qhov ntawd txhais tau tias, O-xylene yog cov khoom siv hluavtaws thiab nws qhov chaw yog roj av. Thiab, cov khoom siv ua kua no muaj txiaj ntsig zoo hauv kev tsim cov phthalic anhydride. Phthalic anhydride yog ib qho tseem ceeb ua ntej rau kev tsim ntau yam tshuaj xws li tshuaj.
YP-Xylene yog dab tsi?
P-Xylene yog ib qho isomer ntawm dimethylbenzene nyob rau hauv uas ob pawg methyl txuas mus rau cov haujlwm sib txawv. Yog tias muaj ob qhov hloov pauv txuas rau ob qhov sib txawv carbon atoms ntawm benzene, peb hu qhov kev teeb tsa no "para" configuration. Yog li, lub npe P-xylene muab los ntawm lub npe "para-xylene". Tsis tas li ntawd, qhov no yog ib txoj cai isomer ntawm ortho thiab meta configurations ntawm dimethylbenzene. P-xylene tshwm sim raws li cov kua nyob rau hauv chav tsev kub thiab tsis muaj xim thiab flammable.
Daim duab 02: Cov qauv ntawm p-xylene
Peb tuaj yeem tsim P-xylene los ntawm kev hloov pauv cov roj av naphtha. Tom qab ntawd cov tsim p-xylene yog sib cais los ntawm cov txheej txheem ntawm distillation thiab crystallization. Ntawm lwm cov isomers ntawm p-xylene, nws muaj qhov siab tshaj plaws melting point. Thaum txiav txim siab yog daim ntawv thov, p-xylene yog ib qho tseem ceeb raws li cov khoom siv tshuaj, ua ib feem ntawm cov khoom siv polymer, thiab lwm yam.
Dab tsi yog qhov zoo sib xws ntawm O-Xylene thiab P-Xylene?
- Xylene yog cov organic compound uas muaj cov tshuaj formula (CH 3)2C6 H4.
- Ob leeg no yog cov kua tsis muaj xim thiab nplaim taws kub ntawm chav tsev.
Qhov txawv ntawm O-Xylene thiab P-Xylene yog dab tsi?
Qhov sib txawv tseem ceeb ntawm O-xylene thiab P-xylene yog tias O-xylene muaj ob pawg methyl txuas rau lub nplhaib benzene ntawm qhov chaw uas nyob ib sab, qhov P-xylene muaj ob pawg methyl txuas rau lub nplhaib benzene ntawm qhov sib txawv. Cov haujlwm hloov pauv.
Tsis tas li ntawd, p-xylene muaj lub siab melting point piv rau o-xylene. Nws yog vim hais tias pawg methyl nyob rau hauv p-xylene yog sib cais nyob rau hauv xws li ib txoj kev uas muaj tsawg strain nyob rau hauv lub molecule. Yog li ntawd, p-xylene molecules muaj qhov sib piv ntawm qhov muaj zog attraction ntawm lawv, uas ua rau nws nyuaj rau cais cov molecules ntawm ib leeg. Yog li, qhov no kuj yog qhov sib txawv ntawm O-xylene thiab P-xylene. Tsis tas li ntawd, lwm qhov sib txawv ntawm O-xylene thiab P-xylene yog tias o-xylene muaj methyl pawg ntawm 1 thiab 2 txoj haujlwm, thaum p-xylene muaj methyl pawg ntawm 1 thiab 4 txoj haujlwm. Thaum xav txog cov txheej txheem ntau lawm, peb tuaj yeem tsim o-xylene ntawm cov roj av tawg thaum peb tuaj yeem tsim p-xylene ntawm kev hloov pauv ntawm cov roj av.
Summary – O-Xylene vs P-Xylene
Xylene yog ib qho organic compound uas muaj cov tshuaj formula (CH 3)2C6 H4 Qhov sib txawv tseem ceeb ntawm O-xylene thiab P-xylene yog tias O-xylene muaj ob pawg methyl txuas rau lub nplhaib benzene ntawm qhov chaw sib txuas, qhov P-xylene muaj ob pawg methyl. txuas mus rau lub nplhaib benzene ntawm txoj haujlwm hloov pauv.
