2results about How to "Achieve complete dissolution" patented technology

This invention, entitled "A Low-Loss β-Carotene Microcapsule and Its Preparation Method," belongs to the field of microcapsule preparation technology. The technical problem to be solved is that during high-temperature melting, particulate all-trans β-carotene transforms into a molecular state, but this process generates a large number of cis isomers and results in significant content loss. Furthermore, the particle size and dispersibility of the particulate β-carotene prepared by grinding are still unsatisfactory, leading to low bioavailability and poor application effects. The key point of this technical solution is to prepare high all-trans molecular β-carotene microcapsules through a specific combination of treatments. This reduces content loss and cis-trans isomerization during the transformation of β-carotene from particulate to molecular state, thereby significantly improving the bioavailability of β-carotene microcapsules. Moreover, the preparation process is simple, cost-controllable, and suitable for large-scale industrial production.

The application provides a synthesis process of hexamethyldisilazane. The synthesis process comprises the following steps: adding trimethylchlorosilane into liquid ammonia, then performing high-pressure stirring reaction to obtain a reaction liquid; performing layer separation, and performing rectification on the lower layer of the reaction liquid to obtain hexamethyldisilazane; performing pressure relief on the upper layer of the reaction liquid, and ammonia gas is generated after the liquid ammonia is vaporized, and ammonium chloride solid is precipitated; performing reduced-pressure drying on the ammonium chloride solid, desorbing the ammonia gas adsorbed on the ammonium chloride, and obtaining refined ammonium chloride. The reaction does not need to add any solvent, the reaction rate is adjusted by controlling the dropping speed of trimethylchlorosilane, and the generated by-product ammonium chloride is completely dissolved by controlling the addition amount of liquid ammonia, so that the mass and heat transfer effects of the reaction are ensured, the product conversion rate is improved, the reaction time is shortened, and the product is easy to separate. The method avoids the use of solvent, generates less waste liquid, is green and environmental protection, and is low in cost.