Kaphatikizidwe ka Alkyl polyglycoside carbonates

Alkyl polyglycoside carbonates anakonzedwa ndi transesterification alkyl monoglycosides ndi diethyl carbonate (Chithunzi 4). Pofuna kusakaniza bwino kwa reactants, zakhala zopindulitsa kugwiritsa ntchito diethyl carbonate mopitirira muyeso kotero kuti imakhala ngati gawo la transesterification komanso monga zosungunulira. 2Mole-% ya 50% sodium hydroxide solution amawonjezedwa kusakaniza kusakaniza ndi kusonkhezera pafupifupi 120 ℃. Pambuyo pa 3hours pansi pa reflux, kusakaniza komwe kumaloledwa kumaloledwa kuziziritsa ku 80 ℃ ndi kuchepetsedwa ndi 85% phosphoric acid. Diethyl carbonate yochulukirapo imachotsedwa mu vacuo. Pansi pazimenezi, gulu limodzi la hydroxyl ndilofunika kukhala ndi esterified. Chiyerekezo cha educt yotsalira kwa zinthu mu 1:2.5:1 (monoglycoside: Monocarbonate:Polycarbonate).

Kupatula pa monocarbonate, zinthu zomwe zimakhala ndi m'malo mwapamwamba zimapangidwanso mwanjira iyi. Mlingo wa carbonate kuwonjezera akhoza kulamulidwa ndi luso kasamalidwe kachitidwe. Kwa C₁₂ monoglycoside, kagawidwe ka mono-,di- ndi tricarbonate wa 7:3:1 imapezeka pansi pa zomwe tafotokozazi (Chithunzi 5). Ngati nthawi yochitira iwonjezeka kufika ku 7hours ndipo ngati 2moles ya ethanol imachotsedwa panthawiyo, chinthu chachikulu ndi C.₁₂ monoglycoside dicarbonate. Ngati achulukitsidwa mpaka 10hours ndipo 3moles ya ethanol imachotsedwa, chinthu chachikulu chomwe chimapezedwa ndi tricarbonate. Mlingo wa carbonate kuwonjezera motero hydrophilic/lipophilic bwino alkyl polyglycoside pawiri atha kusinthidwa mosavuta ndi kusintha kwa nthawi anachita ndi voliyumu distillate.