Add time:07/29/2019 Source:sciencedirect.com
This paper describes the production of pure and granular boric oxide by calcination of AMMONIUM PENTABORATE (cas 12007-89-5) octahydrate [(NH4)2O · 5B2O3 · 8H2O)]in a fluid bed calcinator (FBC). Such calcination is incomplete since agglomeration starts at 623 K, and to avoid agglomeration the boric oxide particles have been covered with a material with a higher melting point than boric oxide itself. In order to achieve this high melting cover, a mixture of ammonium pentaborate and alkali borate has been fed into the FBC. During calcination, the proper percentage of alkali borate has been determined by examining the behaviour of different samples. As the percentage of alkali borate increases, a more homogeneous cover is formed on the surface of particles. This allows the agglomeration temperature of the end-product to shift to 811 K. As a result, granular boric oxide of 99.55%–99.80% purity and containing 0.20%–0.35% Na2O has been produced.
We also recommend Trading Suppliers and Manufacturers of AMMONIUM PENTABORATE (cas 12007-89-5). Pls Click Website Link as below: cas 12007-89-5 suppliers
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View