Elba reaction

Elba reaction org chem The formation of anthracene derivatives by dehydration and cycllzation of diaryl ketone compounds which have a methyl group or methylene group heating to an elevated temperature is usually required. elbs re.ak shan ( ELDOR See electron electron double resonance. ( el,dor or e el de o ar ( electrical calorimeter analy chem Device to measure heat evolved (from fusion or vaporization, for example) measured quantities of heat are added electrically to the sample, and the temperature rise is noted. a lek tra kal kal a rlm ad ar)... 

Elba reaction, 25, 100, 101 Ester formation from acid halide and alcohol, 78... 

Reactions with persulfate and pyrosulfate. The persulfate (peroxy-dlsulfate Ion, S2O8 ) reaction, also known as the Elba persulfate oxidation, has been Important In synthesis of hydroxylated phenols. The method has occasionally been used for synthesis of 0-sulfate conjugates. For example, 4-hydroxy-2-nltrophenyl sulfate was obtained when 3-nltrophenolate was stirred with potassium peroxydlsulfate at room temperature for 2 days (91,). The persulfate reaction has been used for the sulfation of various phenols and aromatic amines however the yields are usually low to moderate (77 ). The sulfate group Is preferentially Introduced In the 4-posltlon of phenols and In the 2-posltlon of aromatic amines but If these positions are blocked substitution at the 2- and... 

Within the project ELBA (Elektro-Auto mit Brennstoffzellen-Antrieb = Electric Car with Fuel Cell Propulsion) at the Research Center lulich, the mobile application of fuel cells is currently being demonstrated. A Fiat Ducato van with electric drive and lead battery has been extended by a fuel cell system consisting of two PEFC with 2.5 kW power each, a hydrogen pressure bottle to store 4 Nm at 20 MPa, 12 air pressure bottles to store 24.4 Nm of air (O2) at 30 MPa, two venting systems for reaction heat removal with 750 Nm /h capacity. The fuel consumption is 4 Nm /h. In the first test phase, the two 2.5 kW fuel cells are utilized to charge the battery during operation. In the second phase, a more powerful fuel cell (30 - 40 kW) could replace the battery. A comprehensive safety and risk analysis for ELBA has been conducted which revealed no significant individual risk (lO /yr) [31]. 

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