3results about How to "Realize large-scale continuous production" 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 preparation method of low-cost high-purity crystalline cristobalite quartz sand, comprising the following steps: mixing a silicon source, high-purity alkali and deionized water in a proportion, and heating to prepare high-purity water glass; mixing the high-purity water glass with high-purity acid in a proportion, stirring to form a precipitate, sealing, standing and using the growth process of the gel to perform segregation and impurity removal, and then performing aging treatment; using deionized water to filter and rinse the precipitate, and drying to obtain amorphous high-purity silica gel powder; performing crystallization transformation and chlorination impurity removal on the amorphous high-purity silica gel powder; using deionized water and dilute acid to clean the cristobalite after crystallization and impurity removal, and drying to obtain high-purity crystalline cristobalite quartz sand. The purity of the quartz sand prepared by the preparation method can reach 5N-7N grade, the preparation cost is low, large-scale continuous production can be realized, the synthesized quartz sand is in a crystalline state, and the produced quartz glass product has lower bubble and flocculent content and better mechanical, heat-resistant and optical properties.

This invention belongs to the field of lithium-ion battery material preparation technology, and discloses a one-step method for preparing lithium bis(fluorosulfonyl)imide using ionic liquid catalysis and hydrogen fluoride. This method solves the problems of low catalytic efficiency, insufficient product purity, difficult separation, and high environmental impact in existing preparation routes. Using bis(fluorosulfonyl)imide and lithium fluoride as raw materials, anhydrous hydrogen fluoride as the fluorinating agent, and an imidazole-based ionic liquid as the catalyst, under an inert atmosphere, the reaction system is prepared, followed by an integrated fluorination-lithiation reaction and post-treatment purification steps to obtain high-purity lithium bis(fluorosulfonyl)imide. This invention achieves efficient reaction under mild conditions through the synergistic effect of a specific ionic liquid and hydrogen fluoride gas, solving the problems of harsh reaction conditions, low yield, and insufficient purity in existing processes. The product yield is ≥92%, and the purity is ≥99%. The process is simple, safe, and environmentally friendly, suitable for large-scale industrial production, and can be widely used in the preparation of lithium-ion battery electrolytes.