摘要:
A micro vial assembly for performing microwave-assisted chemical reactions on small reaction mixture volumes is disclosed, wherein a reaction vessel (10) is sealed through a diaphragm (30) that is capped over an open end of the reaction vessel. The reaction vessel mouths in an end plane of a sleeve (20) surrounding the reaction vessel, the diaphragm being clamped for sealing the open end of the vessel by means of a cap (40) which is secured to the sleeve. The sleeve provides a radial extension of the reaction vessel in order to bridge the radial distance between a wall of the reaction vessel and other components in a system for performing microwave-assisted chemical reactions.
摘要:
Continuous flow heating system and a method of performing chemical reactions in a process fluid carried out in the system. The system includes fluid transporting and containing means (2) and a number of sections (4, 10, 16) adapted to control the temperature of the process fluid according to a predetermined temperature profile. The system comprises at least one heat-up section (4) provided with a microwave heating means and at least one constant temperature section (10 provided with a heating means, adapted to hold the temperature of the process fluid passing through it at a substantially constant temperature T C .
摘要:
The present invention relates to a microwave applicator for heating loads being a waveguide transition between the rectangular TE 10 and TE 20 modes comprising a TE 10 mode section and a TE 20 mode section. The location of the load (4) being inside said TE 20 mode section and with its major axis perpendicularly to the major propagation direction of the TE 20 mode, close to a shorting wall (3) of said TE 20 mode section and also close to the centreline of said propagation direction.
摘要:
A seal mechanism, apparatus and method are suggested for confining a chemical reaction in a reaction vessel (1) that is accessible through a self-sealing diaphragm (5). A movable plunger (7) is reversibly operable between a retracted position where the diaphragm is accessible for injection and/or extraction of reagents, and an operational position wherein the plunger is controlled to apply an external pressure in direct contact with the self-sealing diaphragm.
摘要:
Microwave heating device intended for heating load(s) and comprising a cylinder-shaped cavity (2) enclosed by a periphery wall, said cavity is provided with a microwave feeding means (10). The heating device comprises a dielectric wall structure (8) arranged inside said cavity between said periphery wall and said load(s), wherein said microwave feeding means is arranged to generate a microwave field being an arch surface hybrid mode having TE and TM type properties inside said cavity in order to heat the load(s).
摘要:
Microwave heating apparatus comprising a dielectric microwave applicator provided with a microwave coupling means adapted to feed microwave energy to the applicator. The applicator is provided with a load chamber 8 extending coaxially with regard to the centre axis of the applicator from an upper end to a predetermined distance from a lower end of the applicator, said load chamber is adapted to receive a load to be heated. The dielectric applicator comprises two sections, an upper section 4 provided with the load chamber and a lower section 6 for impedance matching between the coupling means and upper section. In a preferred embodiment the lower section has an increasing crosssectional area from the coupling means to the intersection to the upper section.
摘要:
A method of performing a one-pot organic reaction including carbon monoxide as reactant without the use of an external CO gas source is described wherein a reaction mixture containing a solid or liquid CO releasing compound, a non-metal substrate and a metal catalyst is exposed to an energy source to release carbon monoxide from the CO releasing compound and wherein carbon atoms of the released carbon monoxide form a bond with the non-metal substrate compound. A method of preparing chemical libraries and a kit for organic reactions are also described.
摘要:
Novel solid supported intermediate products of the general formula I coupled to a solid polymeric support through one or both of the R&supl; groups or through the R4 group which are suitable for synthesis of heterocyclic compounds are disclosed. Methods for preparing such intermediate products are also disclosed and also the use of the intermediate products in simple and fast methods on solid phase for synthesis of heterocycles.
摘要:
This invention relates to a method and apparatus for performing microwave assisted chemical reactions, in particular for performing microwave assisted organic synthesis reactions under nearly ideal heating and cooling conditions. The method according to the present invention comprises, supplying substances for a chemical reaction into a reaction chamber, which is adapted to withstand high temperature and pressure, applying microwave heating to initiate the chemical reaction and reach a desired temperature, and cooling the reaction mixture to a desired lower temperature by using adiabatic cooling. The invention also relates to an apparatus for performing the method and use of the method and apparatus for performing organic synthesis reactions.
摘要:
Microwave heating system comprising a plurality of microwave applicators for heating loads arranged in said applicators, a control means, one microwave generator to generate microwave energy having a controllable frequency and power level, and a microwave switch arranged to connect said microwave generator to each of said applicators. Each microwave applicator is dedicated a heating time slot in a time frame, and that said time frame comprises time slots for applicators to be heated. During microwave heating, microwave energy is applied to the microwave applicators in its respective time slot, in consecutive time frames.