N-hexane ntau lawm txheej txheem
Feem ntau ntawm cov khoom siv txawv teb chaws hexane siv cov txheej txheem molecular sieve adsorption, xws li Richfielcd (Richfield) thiab Watson (Watson) hauv Tebchaws Meskas, siv rov tsim kho raffinate li raw khoom, los ntawm kev rov ua dua ob lossis ntau lub txaj rau adsorption. Nias desorption los tsim n-hexane.
Feem ntau domestic hexane manufacturers siv cov txheej txheem hydrogenation distillation, uas tau muab faib ua ob hom:

Ua ntej, hydrogenation ces rectification.

Kuj hu ua pre-hydrogenation, raw khoom yog rhuab los ntawm tshav kub pauv, ncav cuag qhov kub thiab txias, nkag mus rau hydrogenation reactor, desulfurization thiab dearomatization cov tshuaj tiv thaiv nyob rau hauv qhov kev txiav txim ntawm catalyst, hnyav roj thiab hydrogen sib tov nkag mus rau hauv lub tank sib cais. , hydrogen rov qab, hnyav roj rau hauv fractionation ntauwd Txiav rau hauv cov khoom tiav. Feem ntau hais lus, tom qab hydrogenation ntawm raw cov ntaub ntawv, nws tseem yog fractionated thiab txiav mus rau hauv n-hexane, thiab lwm yam ntau hom roj hnyav. Qhov zoo dua yog tias tag nrho cov khoom siv raw yog dearomatized thiab depleted, ua kom tag nrho cov khoom siv. Qhov tsis zoo yog tias kev nqis peev loj thiab cov khoom siv yog siab.

Thib ob, rectification ces hydrogenation.

Kuj tseem hu ua post-hydrogenation, nyob rau hauv cov ntaub ntawv ntawm n-hexane, cov khoom siv raw yog thawj zaug txiav rau hauv cov roj hexane ntawm 66-69 distillation ntau yam, purity ntawm crude hexane tau zoo heev, thiab txij li thaum pawg phenyl yog muaj nyob rau hauv n-hexane, lub hexane nyob rau hauv crude hexane Cov ntsiab lus kuj zoo heev nce, thiab ces raug rau hydrodebenzene desulfurization los tsim high quality n-hexane. Qhov zoo dua yog tias kev nqis peev me me thiab cov khoom siv me me. Qhov tsis zoo yog tias qhov tsis muaj dej tsis muaj dej tsis zoo siv.