Ithini indlela ye-acetylene yokulungiselela i-anhydride ye-maleic evela kwi-1,4-butanediol?

Indlela ye-acetylene ye-1,4-ukulungiswa kwe-butanediol ye-anhydride ye-maleic.

Okokuqala, i-acetylene isabela kwi-formaldehyde xa kukho i-Cu-Bi catalyst kwi-98kPa kunye ne-80-95°C ukuvelisa i-1,4-butynediol. Emva koko, i-1,4-butynediol ifakwa kwi-hydrogen kwi-1,4-butenediol phantsi kwe-catalysis ye-skeletal nickel kwi-1.372-2.06MPa kunye ne-50-60°C. Okulandelayo, i-catalytic hydrogenation engaphezulu (13.7-20.6MPa, 120-140°C) yenziwa nge-Ni-Cu-Mn/Al₂O₃ ukwenza i-1,4-butanediol. Emva kokususa ii-ion zesinyithi nge-ion exchange resin, i-1,4-butanediol ecocekileyo ifunyanwa ngokuhlanjululwa kunye nokuhlanjululwa.

Kutheni ukhetha iMaleic Anhydride? Yisiseko seeresini zepolyester ezingagcwaliyo eziphezulu, kwaye ivula iikhemikhali ezahlukeneyo ezisezantsi (i-BDO, i-THF, njl.njl.). Sithumelele umyalezo ngoku ukuze uhlole izisombululo ze-MA ezenzelwe ishishini lakho!