Method for rapidly dissolving p-hydroxyacetophenone at low temperature

Abstract

The invention provides a method for rapidly dissolving p-hydroxyacetophenone at low temperature, relates to the field of chemical processes. The method comprises the following steps: heating water, and mixing the heated water with polyol at room temperature to obtain a polyol aqueous solution; and mixing p-hydroxyacetophenone with the polyol aqueous solution, and dissolving. According to the invention, the method is simple to operate and convenient to use; the dissolution temperature of p-hydroxyacetophenone can be reduced, dissolution can be completed at a low temperature, the dissolution time is short, and the dissolution efficiency can be remarkably improved; and the dissolving time is short, so that polyol and p-hydroxyacetophenone do not need to be in a high-temperature environment for a long time, and the problems of high-temperature volatilization, deterioration and the like are effectively avoided.

Description

technical field [0001] The invention relates to the field of chemical technology, in particular to a method for rapidly dissolving p-hydroxyacetophenone at low temperature. Background technique [0002] The natural source of p-hydroxyacetophenone is extracted from plants such as Polygonum cuspidatum and Baiwei, and it mainly plays a role in the field of medicine as a component of choleretic and blood lipid-lowering drugs. At the same time, p-hydroxyacetophenone also has certain antimicrobial effects. In recent years, many cosmetic manufacturers have added it as a raw material with antiseptic effect and achieved good results, expanding its application in the field of daily chemicals. However, p-hydroxyacetophenone needs to be added in a high amount when used alone, and its water solubility is about 1%. If you want to achieve a better dissolution effect, you need to dissolve it for a long time, which reduces the convenience of application. [0003] For example, the patent CN...

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Problems solved by technology

[0005] It can be seen from this that the following problems exist in the existing dissolving process: 1) In the existing process, the solvent needs to be continuously heated and stirred, and the whole operation process is relatively complicated, takes a long time and consumes a lot of energy ; 2) The volatilization of polyols increases at high temperatures, and if the high temperature continues, the ratio of polyols, water, and p-hydroxyacetophenone will be out of balance; 3) p-Hydroxyacetophenone is prone to Discoloration and deterioration will affect the subsequent process; 4) In the existing heating method, if the temperature is insufficient or the heating time is insufficient, insufficient dissolution is likely to occur. In this case, although the surface appears to be a clear and transparent solution state, but in In a temperature environment of 4°C or lower, it is easy to re-crystallize and precipitate, resulting in product instability; 5) If you want to lower the dissolution temperature, you need to add other additives to assist dissolution, which not only increases the difficulty of separation, but also reduces the product. the purity of

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