Question 1

Silice Micronizzata Proprietà

Accepted Answer

La Silice Micronizzata è una silice anidra e amorfa che viene ottenuta per idrolisi di SiCl4 in fiamma di idrogeno e ossigeno. Le particelle di SiO2 collidono fra loro in piccoli agglomerati ramificati, le cui catene collassano durante la fase di raffreddamento per formare poi le particelle tridimensionali definitive, con un'area superficiale che varia

Question 2

How is precipitated silica manufactured?

Accepted Answer

Precipitated silica is produced by the controlled neutralization of dilute sodium silicate (waterglass) by either concentrated sulfuric, hydrochloric, or carbonic acids. The raw materials are those required for the silicate: sand, soda ash, caustic soda, and water.

Question 3

Which type of silica gel is best?

Accepted Answer

Blue indicating silica gel contains cobalt chloride and has been banned by the EU. On the other hand, orange silica gel is non-toxic and is widely used in the EU. It works best at room temperature and has a variety of applications where visual control of moisture is necessary.

Question 4

Which country is the largest producer of silica?

Accepted Answer

China is the world's largest silicon producer, with a production volume estimated at six million metric tons in 2021. The second largest producer of this metalloid in the world is Russia, which produced 580,000 metric tons in the same year.

Question 5

What is the difference between hydrated silica and precipitated silica?

Accepted Answer

Precipitated Silica, an amorphous form of silicon dioxide, is white powdery material produced by precipitation of solution containing silicate salts. Hydrated silica is a form of silicon dioxide which has some amount of water.

Question 6

Is silica used in HPLC?

Accepted Answer

Silica is a versatile material with many scientific applications, and serves as the basis for most columns used for reverse phase and normal phase high performance liquid chromatography (HPLC).

Question 7

What are the disadvantages of silica gel?

Accepted Answer

Silica gel is non-toxic but it is a choking hazard for young children. However, in some rare instances, manufacturers coat silica gel in cobalt chloride, a toxic compound. Eating cobalt chloride-coated silica gel will likely cause nausea and vomiting.

Micronized silica production plant

silica water refinery

سلام