Furfuryl cawv ntau lawm technology

Peb lub tuam txhabkoom tes nrog East China University of Science thiab Technology, thiab thawj zaug txais yuav cov tshuaj tiv thaiv tas li nyob rau hauv lub hwj thiab Nruam distillation txheej txheem rau zus tau tej covFurfuryl cawv. Tag nrho pom cov tshuaj tiv thaiv ntawm qhov kub thiab txias tsis siv neeg cov chaw taws teeb tswj, ua kom zoo dua ruaj khov thiab cov nqi tsim khoom qis dua. Peb muaj cov khoom lag luam zoo rau cov khoom siv casting, thiab ua tau zoo hauv cov txheej txheem thiab cov khoom ntau yam. Cov khoom tshwj xeeb ua rau kev txiav txim kuj muaj raws li qhov kev thov los ntawm cov neeg siv khoom. Peb muaj cov kws tshaj lij pab pawg txaus siab rau lub koob npe nrov hauv kev lag luam rau kev tsim khoom, kev tshawb fawb thiab kev pabcuam, uas tuaj yeem daws koj cov teeb meem casting raws sijhawm.

Nyob rau hauv 1931, American chemist Adskins paub lub hydrogenation ntawm furfural rau furfuryl cawv thawj zaug nrog tooj liab chromic acid ua catalyst, thiab pom tias cov by-product yog cov khoom ntawm sib sib zog nqus hydrogenation ntawm furfuran nplhaib thiab aldehyde pab pawg neeg, thiab cov xaiv ntawm. cov khoom tuaj yeem txhim kho los ntawm kev hloov cov tshuaj tiv thaiv kub thiab cov tshuaj tiv thaiv catalytic. Raws li cov xwm txheej sib txawv, cov txheej txheem ntawm furfural hydrogenation rau furfuryl cawv tuaj yeem muab faib ua cov txheej txheem ua kua theem thiab roj theem, uas tuaj yeem muab faib ua txoj kev siab siab (9.8MPa) thiab txoj kev nruab nrab siab (5 ~ 8MPa).

kua theem hydrogenation

Ua kua theem hydrogenation yog tshem tawm cov catalyst nyob rau hauv furfural ntawm 180 ~ 210 ℃, nruab nrab siab los yog siab hydrogenation, cov cuab yeej yog ib tug khoob ntauwd reactor. Txhawm rau txo cov cua sov, qhov sib ntxiv ntawm furfural feem ntau tswj tau thiab lub sijhawm tshuaj tiv thaiv (ntau dua 1h) tau ntev. Vim yog cov khoom siv rov qab, cov tshuaj tiv thaiv hydrogenation tsis tuaj yeem nyob hauv cov kauj ruam ntawm furfuryl cawv, thiab tuaj yeem tsim cov khoom lag luam ntxiv xws li 22 methylfurfuran thiab tetrahydrofurfuran cawv, uas ua rau cov khoom siv raw khoom noj, thiab nyuaj rau rov qab cov khoom pov tseg, yooj yim rau kev siv. ua rau muaj kuab paug loj chromium. Tsis tas li ntawd, txoj kev ua kua theem yuav tsum tau ua nyob rau hauv lub siab, uas yuav tsum tau ntau dua cov khoom yuav tsum tau. Tam sim no, txoj kev no yog siv nyob rau hauv peb lub teb chaws. Cov tshuaj tiv thaiv siab yog qhov tsis txaus ntawm cov txheej txheem ua kua-theem. Txawm li cas los xij, kev tsim cov cawv furfuryl los ntawm cov kua-theem cov tshuaj tiv thaiv nyob rau hauv qis siab (1 ~ 1.3MPa) tau tshaj tawm hauv Suav teb, thiab tau txais txiaj ntsig siab.

Raws li ib qho ntawm cov khoom siv raw rau cov organic synthesis, nws tuaj yeem siv los tsim levulinic acid, furan resin nrog ntau yam khoom, furfuryl cawv-urea resin thiab phenolic resin. Qhov txias tsis kam ntawm cov yas ua los ntawm nws yog zoo dua li ntawm Butanol thiab Octanol esters. Nws kuj yog cov kuab tshuaj zoo rau furan resins, varnishes, thiab pigments, thiab foob pob hluav taws roj. Tsis tas li ntawd, nws kuj tseem siv rau hauv cov khoom siv hluavtaws, roj hmab, tshuaj tua kab thiab kev lag luam foundry.