The design of catalysts active for ammonia synthesis under mild conditions temperature and pressure is a new grail its production process based on green hydrogen intermittent renewable energy sources. Ru/LaScSi Ru/CeTiGe are investigated with an approach combining DFT calculations 15N/14N homomolecular exchange experiments. the most both catalysts. It has electride-like properties which enhance...

A novel catalytic synthesis of 3,3'-(arylmethylene)-bis-(4-hydroxy-2H-chromene-2-one) derivatives from a tandem condensation reaction of 4-hydroxycoumarin and aromatic aldehydes has been developed. The reaction occurs in water in the presence of Melamine trisulfonic acid as catalyst to give the corresponding products in good to high yields. This green approach has several advantages such as sho...

preparation of 2-chlorobenzonitrile, and benzonitrile are reported here from the corresponding 2-chlorobenzaldehyde and benzaldehyde by the reaction of ammonium hydroxide/vpo titania, vpo bulk (ammonium metavanadate) cucr catalyst/air system in methanol. all these catalysts showed better conversions with reasonable selectivity to aromatic. the results prove that bet surface area results show vp...

in ziegler-natta olefin polymerization, the pore architecture of catalysts plays a crucial role in catalyticperformances and polymer properties. while the type of preparation routes (such as chemical reaction andsolution precipitation) greatly affects the catalyst pore architecture as a result of different solidification mechanisms,the modification of the pore architecture within a given route ...

A green and efficient one pot, three component protocol for synthesis of naphthopyranopyrimidines by cyclocondensation of β-naphthol, aldehyde, and 6-amino-1,3-dimethyluracil using L-proline as a beneficial catalyst with high catalytic activity under solvent-free conditions at 100 °C is described. In this study, several types of aromatic aldehyde, containing electron-withdrawing groups as well ...

in this research we used heavy propylene tetramer (hpt) and a1c13 —bf3 (lewis acids) ascatalyst and ethanol, n-propanol and n-butanol as co-catalyst. using lewis acids as catalyst, thehpts form molecules with higher molecular weight. since the raw materials of the reaction are byproducts of other reactions, are not pure and contain various compounds with different m.w andalso different chemical...

This review compiles green synthetic methods intended for the synthesis of oxazole derivatives. Oxazoles are a class compounds with wide range biological activities. The application and activity oxazoles is highly dependent on their structure. Now-a-days, scientists have been performing High demands in often result production various hazardous chemical substances. So, to minimize toxic substanc...

• Green synthesis of zeolite based Cu-Co bimetallic catalysts for methanol production in slurry reactor. synergism over CO 2 hydrogenation to has not yet been reported the literature. Structure-activity relationship methanol. In this study, were synthesized by green deposition precipitation method. To investigate optimum metal-metal ratio, with different metal weight ratios evaluated The XRD an...

Chemistry has a key role to play in maintaining and improving our quality of life, such as in medicine, materials and electronics. However, it has also caused damage to human health and the natural environment. To make chemistry compatible with human health and the environ‐ ment, Anastas and Warner have proposed 12 principles of green chemistry, which help to explain what it means in practice [...