Preparation method of alkyl glycoside of asymmetric Gemini structure
An alkyl glycoside, asymmetric technology, applied in the field of preparation of asymmetric Gemini structure alkyl glycosides, can solve the problems of heavy environmental pollution, difficult rinsing, and the modification of alkyl glycosides can not significantly improve the surface properties, etc., to achieve safe and reliable process , Good product quality and low production cost
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example 1
[0017] First weigh 60g of tapioca starch, add it to 100mL of ethylene glycol, stir at 300r / min for 15min, slowly add 5mL of sulfuric acid solution with a mass concentration of 98%, continue stirring for 30min, add 80g of n-dodecyl alcohol, and add 1.6g of p-toluenesulfonic acid , heated to 115°C, reacted for 4h, cooled to 75°C, stood still for 2h, adjusted the pH to 8 with a mass fraction of 1% sodium hydroxide solution, and distilled under reduced pressure to obtain starch-based dodecyl glucoside for later use; then weighed Take 80g of hexadecyldimethyl tertiary amine hydrochloride, add it to 80mL of absolute ethanol, stir at 300r / min for 15min, add 10mL of epichlorohydrin dropwise at 0.5mL / min to the mixture, and keep the temperature at 25°C Under a water bath, react for 3 hours, distill under reduced pressure to 30% of the volume of the original solution, and filter with suction to obtain a white needle-like solid; then weigh 50 g of the starch-based dodecyl glucoside prepar...
example 2
[0020] First weigh 70g of tapioca starch, add it to 110mL of ethylene glycol, stir at 350r / min for 18min, slowly add 7mL of sulfuric acid solution with a mass concentration of 98%, continue stirring for 35min, add 90g of n-dodecyl alcohol, add 1.8g of p-toluenesulfonic acid , heated to 118°C, reacted for 4.5h, cooled to 78°C, stood still for 2.5h, adjusted the pH to 8.5 with a mass fraction of 1% sodium hydroxide solution, and distilled under reduced pressure to obtain starch-based dodecyl glucoside for later use; Then weigh 85g of hexadecyl dimethyl tertiary amine hydrochloride, add it into 90mL of absolute ethanol, stir at 350r / min for 18min, add 11mL of epichlorohydrin dropwise to the mixed solution at 0.5mL / min, at 25 ~30°C constant temperature water bath, react for 3.5h, distill under reduced pressure to 35% of the volume of the original solution, and filter with suction to obtain a white needle-like solid; then weigh 55g of the starch-based dodecyl glucoside prepared by t...
example 3
[0023]First weigh 80g of tapioca starch, add it to 120mL of ethylene glycol, stir at 400r / min for 20min, slowly add 8mL of sulfuric acid solution with a mass concentration of 98%, continue stirring for 40min, add 100g of n-dodecyl alcohol, and add 2.0g of p-toluenesulfonic acid , heated to 120°C, reacted for 5h, cooled to 80°C, stood still for 3h, adjusted the pH to 9 with a mass fraction of 1% sodium hydroxide solution, and distilled under reduced pressure to obtain starch-based dodecyl glucoside for later use; then weighed Take 90g of hexadecyldimethyl tertiary amine hydrochloride, add it to 100mL of absolute ethanol, stir at 400r / min for 20min, add 12mL of epichlorohydrin dropwise at 0.5mL / min into the mixture, and keep the temperature at 30°C Under a water bath, react for 4 hours, distill under reduced pressure to 40% of the volume of the original solution, and filter with suction to obtain a white needle-like solid; then weigh 60 g of the starch-based dodecyl glucoside pre...
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