Add time:07/24/2019 Source:sciencedirect.com
Potassium nitrate is supported on calcined hydrotalcite by a wet mixing method to produce strong basic sites. X-ray powder diffraction patterns reveal that dropping of potassium salt on calcined hydrotalcite promotes the recovery of the layer structure on rehydration. Potassium species are dispersed on the surface homogeneously up to a loading amount of about 10 wt.% KNO3. 1H MAS NMR results reveal that there are at least three kinds of OH groups on calcined hydrotalcite; strong basic groups, weak basic groups and bulk OH groups. Introduced potassium ions preferentially replace the protons of the weak basic OH groups first and then the protons of the strong basic OH groups. Pyrrole is used as a probe molecule for 1H MAS NMR observation to characterize basicity. The basicity of calcined hydrotalcite is comparable to that of KX zeolite. On the other hand, KNO3 modified hydrotalcite shows stronger basicity after calcination than the calcined hydrotalcite. It adsorbs pyrrole dissociatively.
We also recommend Trading Suppliers and Manufacturers of 1H-pyrrole, potassium salt (cas 16199-06-7). Pls Click Website Link as below: cas 16199-06-7 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