Why is heat evolved or absorbed in a chemical reaction ? View Solution In the presence of a catalyst, the rate of a reaction grows to the extent of105times at298K. Hence, the catalyst must have loweredEaby Exams IIT JEE NEET UP Board ...
In a continuous process for reacting an organic compound with hydroperoxide in the presence of a catalyst, the reaction is carried out in a reactor assembly comprising at least two reactors connected in parallel.Ulrich MullerJoaquim TelesNorbert Rieber...
I. Du Pont De Nemours And Company Reaction with hydrogen in the presence of a catalyst of rheniumUS5068473 * Oct 17, 1990 Nov 26, 1991 E. I. Du Pont De Nemours And Company Reaction with hydrogen in the presence of a catalyst of rhenium...
aThe conversion,or cracking,predominantly takes place in the vapour phase in the presence of a catalyst .This catalyst ,which is available as pellets or as a powder,has the ability to enhance the rate of cracking reactiona and selectively to promote certain types of reactions. 转换或者崩裂,在...
a你拨打的电话正在通话中, You dial the telephone is conversing on the telephone, [translate] athe reaction occurs between a dissolved gas and a liquid-phase reactant in the presence of a solid catalyst. 反应发生在被溶化的气体和液体阶段的反应剂之间在一种坚实催化剂面前。 [translate] ...
mercaptans, thioethers (benzene compounds)oxirane derivativesThe rate of the addition reaction of (I) to oxirane (II) is shown to increase with the radius of the alkali metal cation of the catalyst.doi:10.1002/chin.198833088CHLEBICKI, J.CICHACZ, Z.ChemInform...
Ethylene homologation reaction in the presence of metathesis on MoOx/SiO2 catalyst: Selectively promoted by adding copper Ethylene homologation reaction in the presence of metathesis on MoO x /SiO 2 catalyst: Selectively promoted by adding copperdoi:10.1016/S0166-9834(00)... Takashi,Suzuki,and,.....
We report evidence for the effect of very low magnetic fields on a biological reaction. The presence of magnetite particles (with permanent magnetic moment of 1 emu/g) in the assay had a 30-fold increase on the rate of reaction of horseradish peroxidase. The activity of this enzyme was eval...
aIn addition, the properties of biodiesel produced were found to be comparable with those produced from conventional methanol-based reaction but suffers from long reaction time (5 h) and the presence of catalyst necessitates tedious separation and purification procedures. 另外,导致的biodiesel物产被发现...
This invention relates to processes for converting oxygenates to olefins that include a step of pretreating catalyst, which comprises molecular sieve and one or more active metal oxides of one or more metals, with a hydrocarbon composition to provide an integrated hydrocarbon co-catalyst within the ...