Synthetic Route Xaiv rau Photoinitiator
Lub synthesis ntawm photoinitiator (tshuaj lub npe: 1-hydroxycyclohexylphenyl ketone) feem ntau muaj peb txoj kev:
Benzoyl chloride txoj kev: Siv benzoyl chloride thiab cyclohexanol ua raw cov ntaub ntawv, esterification yog nqa tawm nyob rau hauv triethylamine catalysis, ua raws li los ntawm hydrolysis kom tau cov khoom, nrog ib tug conversion tus nqi ntawm kwv yees li 85%.
Benzic acid txoj kev: Benzoic acid ncaj qha mus rau lub cev qhuav dej condensation nrog cyclohexanol, yuav tsum tau kub (160 degree) thiab ib tug muaj zog acid catalyst, uas ua rau ntau byproducts.
Phosgene txoj kev: Cov tshuaj tiv thaiv mob me me tab sis koom nrog cov tshuaj phosgene uas muaj tshuaj lom heev, tam sim no txwv rau me me - ntsuas qhov ntsuas.
Txheej txheem Optimization rau Industrial Production
Loj -scale ntau lawm yuav tsum tsom mus rau peb yam tseem ceeb:
Kev tshuaj ntsuam xyuas Catalyst: Organotin Catalysts tuaj yeem txo cov tshuaj tiv thaiv kub rau 120 degree, txo cyclohexanol volatilization poob.
Kev xaiv cov kuab tshuaj: Ib qho toluene / dej ob-theem system txhim kho kev hloov pauv huab cua thiab ua kom cov txheej txheem tom ntej.
Tom qab- txhim kho kev txhim kho: Molecular distillation hloov cov tshuab nqus tsev distillation, ua tiav cov khoom purity ntau dua 99.2%.
Cov teeb meem thiab kev daws teeb meem: Cov teeb meem thiab kev daws teeb meem thaum tsim khoom:
Yellowing xim: Nitrogen purging tuaj yeem tiv thaiv oxidation sab; Ntxiv ib qho me me ntawm cov tshuaj antioxidant yuav tsim nyog.
Coking: Tswj lub reactor kub sib txawv nyob rau hauv ± 2℃tsis txhob overheating hauv zos.
Kev hloov pauv hloov pauv: tiag- lub sijhawm saib xyuas cov khoom siv raw cov dej noo (yuav tsum yog<0.1%); installation of an online moisture analyzer.
