| abstract |
The invention discloses a method for directly preparing an alkyl glycoside surfactant by a cellulose one-pot method: mixing cellulose and aliphatic alcohol, adding deionized water and an acidic composite phase transfer catalyst in sequence, and the acidic composite phase transfer catalyst is: The mixture of hydrated dodecylphosphotungstic acid and dodecylbenzenesulfonic acid, the reaction is divided into two control stages, the reaction is cooled to below 80 ° C, filtered, the filtrate is collected, and sodium hydroxide solution is added to neutralize to a pH of 7. Until ~9, add a distillation dealcoholization device, evacuate until the residual pressure is less than 10 mmHg, heat up to 130-180 °C, and keep until the gas phase temperature is less than 40 °C to obtain the alkyl glycoside surfactant. The invention utilizes cellulose widely existing in nature to directly react with medium and long-chain fatty alcohol instead of glucose, and prepares the alkyl glycoside surfactant by one-pot method, thereby expanding the application range of cellulose, and the raw material cellulose used is widely existing in nature. |