Silicon dioxide is an inorganic substance with the chemical formula of SiO2. Silicon atoms and oxygen atoms are arranged in long-range order to form crystalline silicon dioxide, and short-range order or long-range disorder to form amorphous silicon dioxide.

Pure natural silica crystal is a hard, brittle, insoluble, colorless and transparent solid, which is often used in the manufacture of optical instruments.

Do you know the molecular structure of silica or silica gel 60 or silica gel column chromatography?

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· Preparation method of amorphous silica

The preparation of amorphous silica consists of five steps, namely, preparing two silica gel, granulating process, sintering process, cleaning process and drying process.

· Preparation method of crystalline silica

Raw materials containing silica (silicon source), water, structural directing agent, alkali or acid are mixed evenly according to a certain proportion, put into the pressure resistant reactor for sealing, and then raise the temperature to 100-220 ℃, keep the temperature constant for 5 hours to 10 days. After the reaction, the reactor is cooled rapidly, the reaction products are washed with water or dilute acid to pH 8-11, dried to obtain the raw powder, and the raw powder or the products formed by adding binder are in muffle furnace or tubular furnace Roasting activation.

We are a factory engaged in silica gel industry for more than ten years. Our main products are: silica gel 60A, TLC plate, C18 silica gel, C8 silica gel, also known as inverse silica gel.

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