Synthesis ntawm alkyl polyglycoside glycerol ethers

Kev sib xyaw ntawm alkyl polyglycoside glycerol ethers tau ua los ntawm peb txoj kev sib txawv (Daim duab 2, tsis yog cov sib xyaw alkyl polyglycoside, tsuas yog cov alkyl monoglycoside yog qhia raws li educt). Lub etherification ntawm alkyl polyglycoside nrog glycerol los ntawm txoj kev A ua tiav raws li cov kev mob tshwm sim. Lub nplhaib qhib ntawm epoxide los ntawm txoj kev B ib yam nkaus yuav tshwm sim nyob rau hauv muaj cov catalysts yooj yim. Lwm txoj hauv kev yog cov tshuaj tiv thaiv nrog glycerol carbonate los ntawm txoj kev C uas yog nrog los ntawm kev tshem tawm CO₂ thiab qhov twg Presumably pib ntawm epoxide raws li theem nrab.

Cov tshuaj tiv thaiv sib tov yog rhuab 200 ℃ nyob rau ib lub sij hawm ntawm 7 teev thaum lub sij hawm uas cov dej tsim yog tsis tu ncua distilled tawm mus rau displace lub equilibrium kom deb li deb li sai tau mus rau sab khoom. Raws li kev cia siab, alkyl polyglycoside di- thiab triglycerol ethers yog tsim ntxiv rau monoglycerol ether. Lwm cov tshuaj tiv thaiv theem nrab yog tus kheej-condensation ntawm glycerol los tsim oligoglycerols uas muaj peev xwm ua rau muaj kev cuam tshuam nrog alkyl polyglycoside tib yam li glycerol. Xws li cov ntsiab lus siab ntawm oligomers siab dua tuaj yeem xav tau tag nrho vim tias lawv ntxiv txhim kho hydrophilicity thiab yog li piv txwv li dej solubility ntawm cov khoom. Tom qab cov etherification, cov khoom yuav yaj nyob rau hauv dej thiab bleached raws li paub, piv txwv li nrog hydrogen peroxide.

Nyob rau hauv cov kev mob tshwm sim no, qib ntawm etherification ntawm cov khoom yog ywj siab ntawm alkyl saw ntev ntawm alkyl polyglycoside siv. Daim duab 3 qhia qhov feem pua ​​​​cov ntsiab lus ntawm mono-, di- thiab triglycerol ethers nyob rau hauv cov khoom crude sib tov rau plaub qhov sib txawv alkyl saw ntev. Reaction ntawm C₁₂ alkyl polyglycoside muab cov txiaj ntsig zoo. Raws li ib tug roj chromatogram, mono-, di- thiab triglycerol ethers yog tsim nyob rau hauv ib tug ratio ntawm kwv yees li 3: 2: 1. Tag nrho cov ntsiab lus ntawm glycerol ethers yog nyob ib ncig ntawm 35%.