![]() “ Fumed silica process” By MagentaGreen – Own work (CC BY-SA 3. The invention relates to a precipitated silica production process that includes a precipitation reaction between a silicate and an acid, in which the acid. “ Sio2 130m2 per gram under blue book 1600dpi” By Achim Hering – Own work (CC BY 3.0) via Commons WikimediaĢ. “ Fumed Silica.” An Overview | ScienceDirect Topics. The key difference between fumed silica and precipitated silica is that fumed silica is usually small in size whereas precipitated silica is usually larger in size. There are different forms of silica, such as fumed silica and precipitated silica. Summary – Fumed Silica vs Precipitated Silica The below infographic presents the differences between fumed silica and precipitated silica in tabular form for side by side comparison. The key difference between fumed silica and precipitated silica is that fumed silica is usually small in size, whereas precipitated silica is usually larger in size. Precipitated silica is a type of silica that is amorphous and appears as a white, powdery material. It consists of microscopic droplets of amorphous silica fused into branched chainlike 3D secondary particles that can get agglomerated into tertiary particles. What is the Difference Between Fumed Silica and Precipitated Silica?įumed silica is a type of silica produced in flame. There are different important applications such as using as a filler, softener, for cleaning, thickening, and polishing agents, for food processing, pharmaceutical productions, etc. The specific surface area ranges between 5-100 m2/g. When considering the properties of precipitated silica, they are porous, and the diameter ranges between 5-100 nm. We need to avoid the formation of a gel by stirring it at elevated temperatures. Moreover, we can carry out precipitation in acidic conditions. We need to add sulfuric acid and sodium silicate solutions simultaneously with agitation to water. Usually, precipitated silica production starts with the reaction of a neutral silicate solution with a mineral acid. Unlike pyrogenic silica, precipitated silica is not essentially microporous. Precipitated silica is produced by the controlled neutralization of dilute sodium silicate (waterglass) by either concentrated sulfuric, hydrochloric, or. However, precipitated silica has the greatest commercial significance. There are three major types of amorphous silica as pyrogenic silica, precipitated silica, and silica gel. This material is produced through precipitation from a solution consisting of silicate salts. The most common global producers of fumed silica are Evonik, Cabot Corporation, and Wacker Chemie. The method used for fumed silica production is flame pyrolysis of silicon tetrachloride or quartz sand that is vaporized in a 3000 Celsius degrees electric arc. Figure 02: The Production of Fumed Silica ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |