Commercial alkyl glycosides must be removed as much as possible

2019-12-16 11:33:51

Alkyl glucoside, as a new non-ionic surfactant, has the advantages of low surface tension, fine foam, rich and stable, strong detergency and strong compatibility. The product is non-toxic, non irritating and biodegradable, so it can be widely used in detergents, detergents, cosmetics, food and medicine.

There are two methods for the synthesis of alkyl glycosides: one is a one-step method, including the reaction steps, neutralization steps and vacuum distillation steps of sugar and high-carbon fatty alcohol under the action of acid catalyst; the other is a two-step method, including the reaction steps of sugar and low-carbon fatty alcohol under the action of acid catalyst, the alcohol exchange reaction steps, neutralization steps, vacuum distillation or superheated water of high-carbon alcohol and the above reaction liquid Steam distillation for alcohol removal. No matter which method has a common problem, that is, color deterioration in the production process. The color deterioration is due to the presence of some unstable substances in the reaction solution of synthetic glycosides, which change color at 160 ℃ or higher in the process of alcohol removal by distillation. The commercial alkyl glycosides must remove the excess fatty alcohol as much as possible, which forms a pair of contradictions, that is, they should not only fully evaporate the excess fatty alcohol, but also raise the temperature. Therefore, how to reduce the alcohol content and keep a good color at the same time has become the focus of the alkyl glycoside manufacturers and heavy multi scientists.

We have found that the main causes of color deterioration are sugar and acid substances, which are strong polar substances. If these ingredients can be removed before high-temperature distillation and alcohol removal, then we can get fully colorless high-quality products.

The invention aims to provide a simple synthesis process for preparing light to colorless alkyl glycosides with color stability.

With the continuous improvement of people's living standards, dishwashing detergent has become an important product of household cleaning products. The requirements for tableware detergents are also changed from the original high foam, good foam stability in the presence of oil, excellent emulsifying capacity and washing up to consider the above requirements, and also consider the irritation and toxicity of tableware detergents to the skin. However, the low toxicity and irritation of alkyl glycoside make it one of the ideal raw materials for tableware detergent. Due to the characteristics of non rinsing and non marking of alkyl glycoside, it has a strong degreasing ability and a refreshing and comfortable sense of use when it is used in tableware detergent, bottle washing agent, etc.

Among the products of alkyl glycoside, alkyl glycoside is a non-ionic surfactant, which is especially effective for the removal of oily dirt. Alkyl glycosides have the following advantages when applied to laundry detergent: (1) it produces rich and delicate foam. Because of the existence of these delicate bubbles, the friction of clothing, especially fine clothing, such as wool and silk products in the washing machine, is reduced, which is conducive to fabric protection. ② suitable for cold water washing. ③ reduce the irritancy of the detergent. The detergent with alkyl glycoside can effectively remove dirt and oil, and has the properties of softness, antistatic and shrinkage resistance, and can be used normally in hard water.