Lub hauv paus rau phau ntawv
Pentane muaj cuaj isomers, ntawm cov n-pentane [CH3 (CH2) yog yuav luag tsis muaj pa yeeb yaj kiab, thiab chlor 1 {. 0% mus rau 6 {{}}}}}}} nws oction tus lej yog teev ntawm xoom. Cov sib xyaw ua ke ntawm ntau yam sib txawv nrog * Isopentane (uas yog tus lej Ocalane yog teeb tsa ntawm 100) yog siv ua qauv rau kev txiav txim siab lub octane naj npawb roj.
Daim ntawv thov
N-heptane yog cov khoom siv tsis yog-puag ncig, tshuaj tua kab, roj hmab, thiab siv hluav taws xob, thiab siv hluav taws xob, thiab siv hluav taws xob, thiab siv hluav taws xob Cov qauv tshuaj los ntawm kev tsim tawm, thiab tseem siv hauv kev lag luam Organic rau hauv Suav teb yuav nce ntxiv thawm xyoo, tshwj xeeb ntawm cov tshuaj lom neeg, thiab cov khoom siv hluav taws xob ntau ntxiv rau kev ua lag luam zoo nkauj li xyoo
Lub hom phiaj
N-heptane feem ntau yog siv los ua tus qauv rau octural tus nqi kev txiav txim siab, thiab rau cov kuab tshuaj olocic thiab roj hmab qhuav roj hmab thiab roj hmab}} nws tseem siv rau Kev tsim tshuaj kom huv si thiab raws li cov kuab tshuaj rau kev ntxuav cov xim tsev, cov kua roj vanish. Kev siv cov roj av, nrog cov khoom siv tsis tshua muaj siab dawb.
Kev npaj
(1) Tsa cov khoom siv raw n-heptane nrog kev ua yeeb yam ntawm cov kab ntawv tshaj tawm yog: ntev} 2}}}}}}}}}} Cov organic kuab kev ntws mus rau hauv kem los ntawm lub ntiajteb txawj nqus, nrog cov roj ntsha li ntawm cov organic thiab adsorb cov organic thiab tawm ntawm cov organic fydurities, thiab tshem tawm thawj zaug effluent (txog 200 rau 500 milliliters). Vim tias thaum pib, lub impurities nyob rau hauv Silica Gel yuav raug coj tawm, txoj effluent yuav tsum raug kuaj.
(2) ntws tus tsim nyog n-heptane effluent rau hauv diaomite adsorption seem yog tib yam li cov kab ke ntawm cov kab ke xws li carbonyl sib txuas thiab cais lawv los ntawm organic Hnyav {{4} Tus nqi txaus yog 50 mL rau 80}}}}}} Qhov txiaj ntsig pom tau tias kev siv ntawm ob Adsorbents yog qhov zoo dua. Tom qab ob-theem Adsorption, cov ntsiab lus ntawm N-Hephane yog ntau dua lossis sib npaug ntawm 99% {14} {14}
(3) qhuav lub n-heptane effluent los ntawm kauj ruam (2) los ntawm cov kab kom qhuav yog 0, {}}}}}}}}}}}}}}}}}} 05%, thiab yog tias nws yog qhov loj dua 0.05%, nws yog suav hais tias tus neeg sawv cev ziab yog noo nrog dej, thiab tus neeg sawv cev ziab yuav tsum tau hloov ua ntej ziab. Tom qab ziab nrog cov tshuaj pleev anhydrous calhium chloride lossis calcium hydride, cov ntsiab lus noo noo txog 0.01% rau 0.05%.
(4) Ncuav cov dej qhuav rau hauv cov tshuaj tiv thaiv cov tshuaj tiv thaiv cua, tswj qhov kub thiab txias rau 118℃yog 98℃rau 99 degree; Tus Reflux piv yog 10: 5 rau {8.}15. Thaum kawg, tau cov khoom chromatographic n-heptane khoom; Raws li cov txheej txheem txiav txim siab, distill kom tshem tawm cov force-distillate, thiab npaj cov n-heptane tau los ntawm cov txheej txheem distillation rau txhua tus ua kom tiav {}}
(5) After passing the quality inspection, the finished product is filtered through a 0.45 μm microporous filter membrane, filled into bottles, and stored under nitrogen protection.
