What are the main raw materials of alkyl glycosides?

2022-03-02 16:30:14

What are the main raw materials of alkyl glycosides? The main raw materials of alkyl glycosides are starch and its hydrolysates. Starch is a renewable natural resource with rich sources? Low cost. Alkyl glycosides are obtained by dehydration of starch hydrolysate glucose with aliphatic alcohols.

The synthesis methods of alkyl glycosides mainly include trans glycoside method, direct glycoside method, Koenigs Knorr reaction method, enzyme catalysis method and so on.

Glucose and aliphatic alcohol are directly dehydrated to produce alkyl glycosides under the catalysis of acid.



After acetylation of glucose, glycosidic bromide is generated in the presence of HBr HAC, and then reacts with fatty alcohol with Ag2O catalyst to generate alkyl glycosides.

1) Soil cleaning: the restoration effect is good.

Process flow: excavation of contaminated soil, cleaning and remediation of contaminated soil, solid-liquid separation of cleaned soil, treatment of residual materials and final soil treatment.   

2) Leaching remediation of oil contaminated soil: it belongs to in-situ remediation treatment and is applied to soil with good permeability, such as sandy soil.

Principle: use the hydrophobicity and solubilization of the leaching solution to transfer the oil pollutants in the soil to the liquid phase, and extract the liquid phase from the soil for other treatment, and then discharge or reuse.

3) Heating decomposition absorption repair: the cost is high, and there is the problem of soil backfilling after repair.

Principle: Based on the understanding of the characteristics of petroleum components, the contaminated soil is excavated and placed in a certain equipment for heating to a certain temperature, so that the petroleum components in the soil become gas and volatilize at different boiling points.  

4) Gas phase suction repair: applicable to the pollution of petroleum components with low boiling point such as gasoline; Unsaturated zone soil with good permeability and average value; However, the equipment is required to be advanced and expensive.   

Principle: strengthen the directional flow of soil air by extracting the gas phase in the unsaturated zone of the underground layer, so that the oil pollutants entrained in the flowing gas phase migrate to the ground, and collect them for further treatment.