The invention discloses a preparation method of a high-adsorption silicon dioxide used for a lutein carrier. The preparation method comprises the following steps: adding sodium silicate into a synthesizing kettle, introducing steam for temperature rise under the condition of stirring, adding water for carrying out a stirring reaction to obtain a reaction backing material A, and adding sulfuric acid into the obtained reaction backing material A to obtain a reaction fluid B; adding sulfuric acid and sodium silicate into the obtained reaction fluid B simultaneously for carrying out a synthetic reaction for a certain period of time, stopping adding sodium silicate, only adding sulfuric acid for carrying out post-acidification, and carrying out curing to obtain a dilute sizing agent D; and filtering, washing, sizing, drying and packaging the dilute sizing agent D to obtain the silicon dioxide microsphere used for the lutein carrier. Through accurate control for each craft, after the prepared and obtained high-adsorption silicon dioxide used for the lutein carrier is adsorbed with lutein, the silicon dioxide microsphere is high in adsorbability, dispersibility and mobility.

Preparation method of high-adsorption silicon dioxide used for lutein carrier

Provided is a preparation method for a high-adsorption silicon dioxide for a lutein carrier, comprising: adding sodium silicate into a synthesis kettle, introducing steam for temperature rise while stirring, adding water and stirring to carry out reaction to obtain a reaction backing material A, and adding sulfuric acid into the reaction backing material A for acidification until the pH of the solution is 85-105, so as to obtain a reaction fluid B; adding sulfuric acid and sodium silicate into the reaction fluid B simultaneously for a synthetic reaction to obtain a reaction fluid C; stopping adding sodium silicate into the reaction fluid C, only adding sulfuric acid, stopping adding acid after the pH reaches 35-40, and carrying out aging to obtain a dilute slurry D; filtering and washing the dilute slurry D to obtain a filter cake E, transferring the filter cake E to a pulping machine, adding a slurry viscosity reducer, and obtaining a slurry F; and drying and packaging to obtain a silicon dioxide microsphere product According to the method, by means of accurate control for each process, the obtained silicon dioxide for the lutein carrier, after adsorbing lutein, still has the advantages of strong adsorbability, and good dispersibility and mobility

Preparation method for high-adsorption silicon dioxide for lutein carrier

A precipitated silica characterised by the presence of specific acid sites on its surface and a process for its manufacture.

Caroline Fayolle

Papers

Precipitated silica and process for its manufacture