The nuclear magnetic shielding constant
has calculated for He-isoelectronic series (Z=2to10), Li-isoelectronic series (Z=3to5), Be and Li-1 by using RHF method and Data published by Andrew W.
This study is carried out to determine the possibility of using the Iraqi Bentonite raw material for bleaching the cottonseed oil and to study the effect of treatment with acid and caustic on the process of bleaching as well as the effect of the particle size, the degree of temperature and the time required for the process.The Iraqi local material was examined by X-ray diffraction (XRD) and infrared spectroscopy (IR) techniques, also chemical and mineral analysis were used to determine the clay characteristic.Two methods of adsorption were used the physical and
This study is carried out to investigate the possibility of using Iraqi clay; Duekhla kaolin as filler in the paper industry by reducing the percentage of iron oxide, titanium dioxide, and free silica. Duekhla Kaolin containe about 1.7% iron oxide, 1.2% titanium dioxide, 51.16% silicon dioxide, and 12% free silica. The existence of these oxides in kaolin is undesired in paper-making. The process started by washing Duekhla kaolin with (4N) HCl to remove all the soluble oxides which are not required in paper making.
