Combination of Microwave Irradiation with Pressure Setup

Combination of Microwave Irradiation with Pressure Setup 

Milestone/MLS has developed special arrangements for microwave irradiation (2.45 GHz) which can work under high pressure and, if necessary, also under flow conditions. One example is a research project on remediation of organic- 

Another important application is microwave-assisted extraction of natural products in combination with subcritical and supercritical-fluid (carbon dioxide) extraction. This complex installation (Fig. 2.31) was designed, built, and tested at the 

Institute of Nonclassical Chemistry of the University of Leipzig [109-111]. Similar extractions [112] and apparatus [113] have been reported by Pare et al. 

Some years ago D. Stuerga designed a microwave reactor, called the RAMO (reac-teur autoclave microonde), which is not a commercial device. The microwave applicator and the reactor are original. The resonant frequency of the cavity can be controlled by varying the position of a plunger. The effective cavity power can be increased by three orders of magnitude. The autoclave is made of polymeric materials, which are microwave transparent, chemically inert, and sufficiently strong to accommodate the pressures induced. The reactants are placed in a Teflon flask inserted within a polyetherimide flask. A fiber-optic thermometry system, a pressure transducer, and a manometer enable simultaneous measurement of temperature and pressure within the reactor. The system is controlled by pressure. The reactor is shown in Fig. 2.32. 

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