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مقاله تحقیق پروژه دانش آموزی و دانشجوییHA Zeolite as a Recyclable Catalyst for the Green Synthesis of Aryl naphthoxazinone Derivatives
HA Zeolite as a Recyclable Catalyst for the Green Synthesis of Aryl naphthoxazinone Derivatives
An efficient green procedure for the preparation of aryl naphthoxazinones, applying a three-component one-pot condensation reaction of 2-naphthol, aromatic aldehyde and urea in the presence of HA zeolite under heating conditions in dimethyl sulfoxide has been developed. The present procedure offers several advantages such as short reaction time, simple workup and moderate to high yields, recovery and reusability of the catalyst. ...
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The effect of Application of Polypropylene and Zeolite in Correction of Strength Parameters of Silty Sand
The effect of Application of Polypropylene and Zeolite in Correction of Strength Parameters of Silty Sand
Achievement to conditions with more economic efficiency has been of the main objectives of construction projects, so that reinforcement of bed soil in these projects can be effective in obtaining of those objective. In order to realize those objectives, wide studies have been conducted which resulted in very various methods of improvement (physical, mechanical, and chemical). In this way, due to efficacy and special capabilities of mechanical methods, using of Polypropylene fibers have drawn ...
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Interaction Effect of Usage of Polypropylene Fiber and Zeolite on Strength Parameters of Silty Sand
Interaction Effect of Usage of Polypropylene Fiber and Zeolite on Strength Parameters of Silty Sand
Due to the increasing cost of high quality materials needed for different geotechnical projects, engineers try to improve the physical properties of local soils through- out different methods and techniques. This paper investigates interaction effect of usage of polypropylene fiber and zeolite on strength parameters of silty sand. Accordingly, usage of an additive material besides fiber, raises an issue about synergistic interaction effect on soil strength. Usage of fiber or zeolite lonely is ...
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