Synthesis ntawm alkyl polyglycoside butyl ethers

Ib qho khoom uas nquag xav tau ntawm alkyl polyglycosides yog txhim kho foamability. Txawm li cas los xij, hauv ntau daim ntawv thov, qhov tshwj xeeb no tau suav tias yog qhov tsis zoo. Yog li ntawd, tseem muaj kev txaus siab rau kev tsim cov alkyl polyglycoside derivatives uas sib xyaw ua haujlwm zoo nrog tsuas yog me ntsis nyiam ua npuas ncauj. Xav txog lub hom phiaj no, alkyl polyglycoside butyl ether tau ua ke. Nws paub nyob rau hauv cov ntaub ntawv hais tias alkyl glycosides yuav capped nrog alkyl halides los yog dimethyl sulfate nyob rau hauv alkaline aqueous daws.

Ntawm kev lag luam, cov tshuaj tiv thaiv hauv cov tshuaj aqueous yog qhov tsis zoo vim tias cov khoom tsis muaj dej tsis muaj zog tuaj yeem tau txais yam tsis muaj kev ua haujlwm ntxiv. Yog li ntawd, cov txheej txheem dej tsis muaj dej tau tsim, uas tau teev tseg hauv daim duab 6. Lub alkyl polyglycoside yog thawj zaug nkag rau hauv lub reactor nrog ntau tshaj ntawm butyl chloride thiab rhuab mus rau 80 ℃. Cov tshuaj tiv thaiv yog pib los ntawm kev ntxiv ntawm potassium hydroxide ua tus catalyst. Thaum ua tiav cov tshuaj tiv thaiv, cov tshuaj tiv thaiv sib tov yog neutralized, cov poov tshuaj chloride precipitate yog lim tawm thiab tshaj butyl chloride distilled tawm. Cov khoom yog tsim los ntawm ntau yam alkyl polyglycosides thiab alkyl polyglycoside butyl ethers. Raws li GC tsom xam, qhov piv ntawm alkyl monoglycoside, alkyl mono-glycoside monobutyl ether thiab alkyl monoglycoside polybutyl ether yog 1: 3: 1.5.

Cov chav kawm ntawm cov tshuaj tiv thaiv rau etherification ntawm C₁₂alkyl polyglycoside yog qhia nyob rau hauv daim duab 7. Cov ntsiab lus monoglycoside txo los ntawm ib ncig ntawm 70% mus rau tsawg dua 20%. Nyob rau tib lub sijhawm, tus nqi rau monoether nce mus rau 50%. Qhov ntau monobutyl ether tam sim no, ntau polybutyl ethers tuaj yeem tsim los ntawm qhov ntawd. Tsuas yog tom qab 24 teev yog muaj ib qho tseem ceeb tsim ntawm polybutyl ethers. Raws li qhov xav tau, cov ntsiab lus ntawm polyethers nce ntxiv nrog rau lub sijhawm tshuaj tiv thaiv. Txawm li cas los xij, tus nqi ntawm 20% tsis tshaj. Qhov nruab nrab etherification degree yog 1 ~ 3 butyl ib chav tsev alkyl glycoside. Cov tshuaj tiv thaiv ntawm C₁₂alkyl glycoside yog qhov zoo tshaj plaws. Nyob rau hauv rooj plaub ntawm N = 8 los yog 16 alkyl polyglycoside butyl ether, cov txiaj ntsig tsis zoo.

Los ntawm peb cov piv txwv no nws yog tseeb hais tias derivatives ntawm alkyl glycosides yog nkag tau yooj yim.Qhov tshwj xeeb siv envisaged kuj nyob ntawm seb lub nto-kev ua ub no ntawm cov derivatives.