Microwave assisted pyrolysis of urea supported on graphite under solvent-free conditions

Tetrahedron Letters

Volumn 42, Issue 22, 2001, Pages 3693-3695

  Chemat, Farid ^a   Poux, Martine ^b  

^a Grp Rech Sur Le Micro E   (France)

^b Ecl Natl Sup d'Ing Genie C   (France)

Author keywords

[No Author keywords available]

Indexed keywords

CYANURIC ACID; GRAPHITE; ORGANIC SOLVENT; UREA; WATER;

ARTICLE; CHEMICAL REACTION; HEATING; HIGH TEMPERATURE; MICROWAVE RADIATION; PHASE TRANSITION; PRESSURE; PYROLYSIS; REACTION ANALYSIS; REACTION TIME;

EID: 0035962987     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4039(01)00545-7     Document Type: Article

References (10)

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5. Garrigues B., Laporte C., Laurent R., Laporterie A., Dubac J. Leibigs Ann. 1996;739-741.
6. The microwave experiments were accomplished in Synthewave 402 microwave reactor supplied from Merck Eurolab and nowadays from CEM. This single mode cavity is optimised to have a good coupling to a variety of liquids and a homogeneous power distribution. The feeding magnetron operates at 2.45 GHz with a maximum power range of 300 W. The quartz reactor vessel, with a capacity of 10-150 ml, is fitted with a condenser and mixed by a quartz stirrer. The temperature is measured at the bottom of the reactor by an IR sensor and controlled by a feedback to microwave power regulation.
7. In a typical run, 20 g of urea with 5 g of graphite were introduced in the reactor and heated under stirring. The reactor was made of quartz. It was fitted with a thermocouple for temperature control. At the desired reaction time, the reactor was rapidly cooled down and the resulting mixture analysed by HPLC [Spectraphysics P1500-UV150] with a Hamilton PRP-1 column.
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10. Hajek M., Radoiu M.T. J. Mol. Catal. 160:2000;383-392.