Qalabaynta Alkyl polyglycoside carbonates

Alkyl polyglycoside carbonates waxaa lagu diyaariyey transesterification of alkyl monoglycosides leh dietyl carbonate (Jaantus 4). Iyadoo loo eegayo danaha isku-dhafka buuxa ee fal-celiyeyaasha, waxay caddeeyeen inay faa'iido u leedahay in la isticmaalo kaarboonka diethyl ee xad-dhaafka ah si ay ugu adeegto labadaba sida qaybta transesterification iyo sida dareeraha. 2Mole-% of a 50% sodium hydroxide xal waxaa lagu daraa dropwise in isku dar ah oo walaaqaya agagaarka 120 ℃. Ka dib 3hours hoos reflux, isku darka falcelinta waxaa loo ogol yahay in ay qaboojiso ilaa 80 ℃ iyo dhexdhexaad 85% fosfooraska. Kaarboonaydh-ka diethyl ee xad-dhaafka ah ayaa lagu dami meel bannaan. Xaaladahan falcelinta, hal koox oo hydroxyl ah ayaa la doorbidayaa in la nadiifiyo. Saamiga ka soo haray ee alaabta ku jirta 1:2.5:1 (monoglycoside: Monocarbonate: Polycarbonate).

Ka sokow monokarbonate-ka, badeecooyinka leh beddelka heerka sare ayaa sidoo kale lagu sameeyay falcelintan. Heerka isku-darka karboonaytka waxa lagu xakamayn karaa maaraynta xirfadda leh ee falcelinta. Waayo, C₁₂ monoglycoside, qaybinta mono-, di- iyo tricarbonate ee 7:3:1 ayaa lagu helay xaaladaha falcelinta ee hadda lagu sifeeyay (Jaantuska 5). Haddii waqtiga falcelinta la kordhiyo ilaa 7saacadood iyo haddii 2 moles oo ethanol ah la nadiifiyo wakhtigaas, badeecada ugu weyn waa C₁₂ monoglycoside dicarbonate. Haddii la kordhiyo 10saacadood iyo 3 moles oo ethanol ah ayaa la nadiifiyaa, badeecada ugu weyn ee ugu dambeyntii la helay waa tricarbonate. Heerka isku-darka karbohaydraytka iyo markaa dheellitirka hydrophilic / lipophilic ee xarunta alkyl polyglycoside ayaa sidaas si ku habboon loogu hagaajin karaa isbeddelka wakhtiga falcelinta iyo mugga distillate.