Ukwenziwa kwealkyl polyglycoside butyl ethers

Ipropathi efunwa rhoqo yealkyl polyglycosides kukwandiswa kogwebu. Nangona kunjalo, kwizicelo ezininzi, eli nqaku lithathwa njengelibi. Ngoko ke, kukho umdla ekuphuhliseni i-alkyl polyglycoside derivatives edibanisa ukusebenza kakuhle kokucoca kunye nokuthambekela okuncinci kwi-foam. Ukuqwalasela le njongo, i-alkyl polyglycoside butyl ether yenziwe. Kuyaziwa kwiincwadi ukuba i-alkyl glycosides inokuthi ifakwe kwi-alkyl halides okanye i-dimethyl sulfate kwi-alkaline aqueous solutions.

Kwinqanaba loshishino, ukusabela kwisisombululo se-aqueous kuyinto engalunganga kuba iimveliso ezigxininisiweyo ezingenamanzi azikwazi ukufunyanwa ngaphandle kwamanyathelo ongezelelweyo okusebenza. Ngoko ke, inkqubo engenamanzi yaphuhliswa, echazwe kuMfanekiso 6. I-alkyl polyglycoside iqale ifakwe kwi-reactor kunye nokugqithisa kwe-butyl chloride kwaye ishushu kwi-80℃. Ukusabela kuqalwa ngokongezwa kwe-potassium hydroxide njenge-catalyst. Ekugqityweni kwempendulo, umxube wokuphendula awuthathi hlangothi, i-potassium chloride precipitate iyahluzwa kwaye i-butyl chloride engaphezulu iyachithwa. Imveliso yenziwe ngee-alkyl polyglycosides ezahlukeneyo kunye ne-alkyl polyglycoside butyl ethers. Ngokutsho kohlalutyo lweGC, umlinganiselo we-alkyl monoglycoside, i-alkyl mono-glycoside monobutyl ether kunye ne-alkyl monoglycoside polybutyl ether yi-1: 3: 1.5.

Indlela yokusabela kwi-etherification ye-C₁₂I-alkyl polyglycoside iboniswe kwi-Figure 7. Umxholo we-monoglycoside uyancipha ukusuka kwi-70% ukuya ngaphantsi kwe-20%. Ngexesha elifanayo, ixabiso le-monoether liphakama ukuya kuma-50%. Okukhona i-ether ye-monobutyl ikhoyo, kokukhona ii-ether ze-polybutyl zinokwakheka ukusuka apho. Kuphela emva kweeyure ze-24 kukho naluphi na ukwakheka okubalulekileyo kwe-polybutyl ethers. Njengoko kulindelwe, umxholo we-polyethers uyanda ngokunyuka kwexesha lokuphendula. Nangona kunjalo, ixabiso le-20% aligqithiswanga. Umndilili wedigri ye-etherification yi-1 ~ 3 butyl ngeyunithi yealkyl glycoside. Isiphumo sokusabela kukaC₁₂I-alkyl glycoside yayiyeyona ilungileyo. Kwimeko ye-N = 8 okanye i-16 i-alkyl polyglycoside butyl ether, iziphumo ziyancipha.

Kule mizekelo mithathu kuyacaca ukuba izinto eziphuma kwi-alkyl glycosides zifumaneka lula.