Method for synthesizing alkyl glycoside 0810 from dextrose monohydrate

Abstract

The invention discloses a method for synthesizing alkyl glycoside 0810 from dextrose monohydrate. The method comprises the following steps: taking p-toluenesulfonic acid as a catalyst, reacting dextrose monohydrate and excessive fatty alcohol to produce alkyl glycoside, neutralizing, dealcoholizing, bleaching and the like, thereby obtaining 50% of APG. Compareed with the prior art, the method disclosed by the invention has the advantages that anhydrous dextrose is replaced with the dextrose monohydrate, and the production cost is effectively reduced. The process disclosed by the invention hasthe advantages of being simple, convenient to operate, high in yield and capable of avoiding environmental pollution; and the prepared alkyl glycoside 0810 has excellent broad spectrum antibacterial activity, and the product is obvious in thickening effect, easy to dilute and capable of avoiding a gel phenomenon, and can serve as a main raw material in daily chemicals such as liquid shampoo, shower gel, facial cleansers, laundry detergents, liquid soap, dish washing liquid, vegetable and fruit cleaning agents and the like.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a method for synthesizing alkyl glycoside 0810 from glucose monohydrate. Background technique [0002] Alkyl glycosides, referred to as APG, have excellent ecological and toxicological properties, excellent physical and chemical properties, and good compatibility. It has low surface tension, strong detergency, rich and fine foam, and can be compounded with any type of surfactant It has obvious synergistic effect, and is non-toxic, harmless, non-irritating, and its biodegradability is better than any other type of surfactants. functional surfactant. [0003] The existing process of synthesizing alkyl glycosides with glucose and fatty alcohols as raw materials under acid-catalyzed conditions involves condensation reaction of granular glucose and fatty alcohols, followed by neutralization, distillation, decolorization and bleaching to obtain alkyl glycoside products, but com...

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Problems solved by technology

[0003] The existing process of synthesizing alkyl glycosides with glucose and fatty alcohols as raw materials under acid-catalyzed conditions involves condensation reaction of granular glucose and fatty alcohols, followed by neutralization, distillation, decolorization and bleaching to obtain alkyl glycoside products, but commonly used, The reaction speed of granular glucose and fatty alcohol condensation reaction is slow and the reaction time is long, and glucose is also easy to agglomerate, making it difficult to completely react glucose; dehydration condensation between glucose and dehydration of glucose itself is easy to occur, making alkyl glycoside products The content of impurities is high, the color is dark, and it is difficult to remove impurities; glucose is a heat-sensitive substance, because the solid-liquid reaction rate is slow, it is necessary to increase the reaction rate during the reaction process, and a higher reaction temperature will lead to glucose polymerization. Block and other disadvantages

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