Octane (C₇H₁₆), raws li ib qho tseem ceeb ncaj ncaj-saw alkane xyaum cov khoom siv, ua si ib qho tseem ceeb ntawm lub luag haujlwm hauv ntau cov haujlwm. Kab lus no yuav qhia tau piav ntau ntxiv rau ntawm nws cov nqi muaj kev lag luam los ntawm ob qhov ntev: cov thev naus laus zis ntau lawm thiab cov ntawv thov teb.
I. Cov Tshuab Ntau Lawm
Cov txheej txheem tseem ceeb ntawm cov roj av distillation:
Raw khoom ua: Siv lub teeb naphthha feem nrog ib qho kub ntau ntawm 60-105 degree, thiab cov neeg Sulfur cov ntsiab lus yuav tsum tau tswj hwm ntawm<10 ppm.
Hydrogenation Refining: CO-Mo / al₂oous catalyst, cov kev tshwm sim ntawm 250-300 degree, Sulphur Tshem Tawm Tus Nqi> 99.5%
Molecular sab cib sib cais: 5A hom molecular sab cib sib xaiv xaiv adsorbs, kev ua haujlwm kub ntau ntawm {{1} degree
Cov kab mob fractionation: 100 theoretical daim hlau, Reflux piv 15: 1, uas ua rau cov khoom muaj kev coj dawb huv ntawm 99% lossis siab dua.
Cov txheej txheem tseem ceeb parameter sib piv:
| Txheej Txheem|Qhov kub (degree)|Siab (mpa)|Cov Txheej Txheem Tswj Xyuas|| ------|---------|----------|------------- |
| Hydrogenation|250-300|3-5|Sulphur ntsiab lus <0.5 ppm |
| Adsorption|180-220|0.5-1.0|Kev ua kev sib tw pataffin li qub> 95% |
| Distillation|80-120|0.05-0.1|Cov khoom lag luam kawg |
Ii. Daim ntawv thov tseem ceeb tseem ceeb
Cov Ntawv Thov:
Roj Hmab Kev Lag Luam: Ntuj Roj Hmab Diav thiab SBS Khoom Siv Hluav Taws Xob
Txheej Txheej Txheem: Offset Ink Hnyuab Kuab, UV Txheej Distuent
Hauv tu: semiconductor-qib (nrog kev coj dawb huv ntawm 99.9% lossis siab dua) tu tus neeg sawv cev
Tshuaj hloov pauv:
Catalytic kho dua tshiab: tsim cov xylene thiab lwm yam kws ua yeeb yam, nrog xaiv tau ntawm ntau dua 60%
Chav tawg: Ethylene tawm los 30%, Propylene 25%
Cov Qauv Txheem:
Octane tus nqi siv tshuaj (ron=0)
Kev muag khoom siv lub sijhawm calibration ntawm chromatographic
III. Kev tswj kom zoo thiab kev nyab xeeb
Cov Qauv Zoo:
Purity ntau dua los yog sib npaug rau 99%
Dej cov ntsiab lus tsawg dua los yog sib npaug rau 50 ppm
Cov ntsiab lus Sulfur tsawg dua lossis sib npaug rau 1 ppm
Cov ntxhiab hydrocarbons tsawg dua los yog sib npaug rau 0.1%
Cov Lus Qhia Kev Nyab Xeeb:
Flash point: -4 degree, cais raws li cov kua roj hnyav
Cov khoom siv rau kev tiv thaiv tawg yog qhov yuav tsum tau ua.
Cov concentration txwv hauv lub chaw ua haujlwm yog 400 PPM (lub sijhawm hnyav nruab nrab).
Qhov kev txhim kho kev txhim kho tam sim no qhia tau tias qhov kev thov rau high-purity n-heptane txuas ntxiv hauv cov khoom siv hluav taws xob thiab kev lag luam. Nyob rau tib lub sijhawm, daim ntawv thov ntawm adsorption tshiab kev sib cais thev naus laus zis yog tsav tsheb cia cov nqi ntau lawm. Cov neeg tsim khoom yuav tsum tsom rau kev txhim kho kev coj dawb huv thiab kev hloov pauv rau kev ua lag luam nruj me ntsis.
