quartz microwave denitration process vessel

Microwave-assisted sample preparation :: Anton Paar Wiki

Thanks to microwave-assisted sample preparation and its fast heating effect and instant on-and-off the run time compared to open-vessel techniques is significantly lower as a higher temperature correlates with a shorter digestion time. There are various systems available for microwave-assisted sample preparation.


Development of recycling processes for clean rejected …

Denitration process vessel: Three types of quartz process vessels (1 l each) namely dish shaped, wide neck and narrow neck beakers were taken for MicroWave Direct Denitration experiments. 3. Jaw crusher: The feed material was passed through the no-rebound hopper before entering the crushing chamber. The size reduction takes place in the wedge ...


10-20L Reactor Systems- Chemglass Life Sciences

20l process reactors, cylindrical, unjacketed, electric or air motor CG-1964 CG-1965 10L JACKETED 10L PROCESS REACTORS, CYLINDRICAL, JACKETED, ELECTRIC OR …


Nitrogen oxide removal by non-thermal plasma for marine ...

3.2 Experimental method The total gas flow is kept constant at 2 L min −1 with N 2 as carrier gas in all experiments. The concentrations of N 2, NO, CO 2, O 2, and NH 3 in the DBD reactor are adjusted by the mass flow controllers. The H 2 O is added in by bubbling method, and its concentration is controlled by the temperature of the water bath. Before each group of …


Microwave Assisted Acid Digestion for Elemental Analysis ...

4.1.24 Quartz injector, 2.0mm ID iCap Q/Qnova (Thermo, 1305640). 4.1.25 Balance 4.1.26 Microwave solvent extraction apparatus, MARS Xpress System (CEM Microwave Technology). 4.1.27 Microwave extractionTeflon vessels, 50 mL (Large size, CEM Microwave Technology). 4.1.28 Microwave extraction Teflon vessel plugs, MARS Xpress System (CEM


Reactor Technology - Instruments

Reactor Technology. Berghof Reactor Technology. Modern high-pressure-reactors have to be technically safe, reliable, flexible and easy to use. At Berghof quality, safety and flexibility are integrated already in the design concept. Incomparable protection against corrosion due to a combination of high quality PTFE and a unique sealing system.


US6806784B2 - Miniature frequency standard based on all ...

A microwave frequency standard is provided which allows for miniaturization down to length scales of order one micron, comprising a modulated light field originating from a laser that illuminates a collection of quantum absorbers contained in a micro-machined cell. The frequency standard of the present invention can be based on all-optical excitation techniques such as …


Microwave Reactor 1 - Biotage | UCSB Shared ...

Microwave irradiation is electromagnetic irradiation in the frequency range of 0.3 to 300 GHz. All domestic "kitchen" microwave ovens and all dedicated microwave reactors for chemical synthesis operate at a frequency of 2.45 GHz (which corresponds to wavelength of 12.24 cm) to avoid interference with telecommunication and cellular phone frequencies.


Use of Microwave Radiation for Denitration of Uranyl ...

12%A 500-mL quartz flask containing 250 mL of the UO 2 (NO 3) 2 solution was placed in the chamber of a Samsung MW73VR microwave oven (radiation frequency 2.45 GHz, magnetron power up to 800 W) onto a heat-protecting support made of a light fibrous ceramic composite. The flask was stoppered with a ground-in Teflon stopper with …


Microwave Digestion System - CEM Corporation

Microwave acid digestion is a technique to dissolve metals, bound within a sample matrix, into liquid. This is achieved by exposing a sample to a strong acid, in a closed vessel and raising the temperature and pressure through microwave irradiation. Both the speed of thermal decomposition of the sample, ... the process is even easier. 1 ...


MICROWAVE APPLICATIONS | Microwave Processing of …

Microwave sintering is of interest because of the extensive exploratory work accomplished and because of the broad range of ceramic materials that have been investigated. Microwave processing of ceramic powders is a relatively new area with promise of broad applications in synthesis and processing.


Converting a Microwave Oven into a Plasma Reactor: A Review

This paper reviews the use of domestic microwave ovens as plasma reactors for applications ranging from surface cleaning to pyrolysis and chemical synthesis. This review traces the developments from initial reports in the 1980s to today’s converted ovens that are used in proof-of-principle manufacture of carbon nanostructures and batch cleaning of ion implant …


CHINA NUCLEAR SCIENCE AND TECHNOLOGY REPORT

Microwave denitration can accomplish the denitration and the conversion pro-cess from uranyl nitrate to oxide in same vessel. In microwave denitration process, the ni-trate solution is concentrated, crystallized and then denitrated. The process operation is quite simple and uranium loss during denitration is very low. So the microwave denitration


CEM Microwave Technology – Lab Innovations UK

Unparalleled speed and efficiency. Synthesize 20mer's every 45 minutes. The Liberty PRIME™ peptide synthesizer is the most advanced platform available for microwave peptide synthesis. It features a revolutionary one-pot deprotection and coupling process allowing for a remarkable 2 minute cycle time with only 8.5mL waste per cycle (at 0.1 mmol).


Biotage Microwave Reaction Vials

Each Biotage microwave vial has been designed for safe and efficient heating within its specified volume range. Together, the four vial types provide full scalability within the volume range 0.2–20 mL. Methods that are run at a lower volume are directly transferrable across the entire volume range of 0.2–20 mL.


A Guide To Canada's Export Controls - Groups 3 to 7 and Index

3. In machines based on microwave accelerating cavities, the time duration of the beam pulse is the lesser of 1 μs or the duration of the bunched beam packet resulting from one microwave modulator pulse. 4. In machines based on microwave accelerating cavities, the peak beam current is the average current in the time duration of a bunched beam ...


US4563335A - Apparatus for continuously concentrating …

An apparatus for continuously concentrating and denitrating a radioactive nitrate solution by microwave includes a rotatably supported concentrating and denitrating vessel disposed within an oven into which microwave is applied through waveguides. The concentrating and denitrating vessel comprises a circular vessel body supported rotatably about its center and a plurality of …


Extraction of Water from Polar Lunar Permafrost with ...

Laboratory setup for the proof of principle experiments. The quartz vacuum vessel (A) rests in a regolith bed contained by a polyethylene container (D) inside a commercial microwave oven. A vacuum line attached to the quartz vessel (A) contains a cold trap (B) in line with the turbo-molecular vacuum pumping station (C).


US7700058B2 - Process for denitration of exhaust gas ...

A denitration process for removing nitrogen oxides contained in low-temperature exhaust gas at a high denitration rate; namely, a denitration process for reductively removing nitrogen oxides contained in an exhaust gas (x) containing nitrogen monoxide and sulfur dioxide. The process comprises a preliminary step 2 of partially oxidizing nitrogen monoxide in the exhaust gas to …


Microwave assisted extraction of phytochemicals an ...

procedure in microwave assisted extraction, while under atmospheric pressure an open extracting vessel is used as an alternative approach for microwave assisted extractions (Kaufmann and Christen 2002). There are four major components of both open cell and closed vessel systems: Whenever working with microwave assisted extraction, 1.


Microwave Digestion System: Multiwave 7000 :: Anton-Paar.com

Multiwave 7000 can be used with high (≥0.5 g) and low sample amounts (≤0.1 g) as well as high (≥50 mL) and low sample volumes (≤100 µL). Pressure-sealed glass, quartz, or PTFE-TFM vials as well as sealed quartz vessels (e.g. for osmium determination) enable the use of all common digestion acids. Additionally, sample stirring can be ...


Advanced Microwaves Reactors with SRC Technology - …

Reactions can be carried out directly in the 1L PTFE vessel, or in multiple vials. Vials are available in glass (disposable), quartz or PTFE, fitted with loose PTFE caps to ensure pressure equalization. Available rack configurations include 4, 5, 15 and 22 positions.


Source Apportionment of PM2.5 at Urban and Suburban Sites ...

A 2 cm × 2 cm portion of each quartz filter sample was cut into fragments using ceramic scissors and placed into a conical Teflon tube. Acid solutions (10 mL 65% HNO 3 and 5 mL 35% H 2 O 2) were added into the tube for digestion using a closed microwave digester (TOPEX; PreeKem Scientific Instruments Co., Ltd., China). After being completely ...


Treatment of substances - United Kindgom Atomic Energy ...

The process vessel may be made of a ceramic material and may be subjected to microwave radiation by being positioned inside a microwave cavity (oven). Since the heating by microwave radiation tends to be localised in the region of the process vessel (especially where thermal insulation is provided as hereinbefore mentioned) oven walls need not ...


Development of a Process for the Co-Conversion of Pu-U ...

Abstract. Along the line of a nonproliferation policy for nuclear materials, the development of a process for the co-conversion of Pu-U nitrate mixed solutions to mixed-oxide (MOX) powder has been carried out, and through the bench-scale experimental work performed at the Power Reactor and Nuclear Fuel Development Corporation, a new co-conversion …


Microwave Heating - an overview | ScienceDirect Topics

On the other hand, when choosing vessel material a lower value for tan δ is suitable to avoid absorption of microwaves by vessel walls (as can be seen for fused quartz in Table 2.3). In summary, it is important to point out that for microwave heating both properties ε ′ and ε ″ are a function of microwave frequency [36] .


Microwave Chemistry in Organic Synthesis (By A. Bacher ...

an uptake of heat during the microwave process. Thus, SiC vessels are often used in cases where the reaction mixture does not absorb the heat efficiently enough. Compound tan Quartz 6.0*10-5 Porcelain 1.1*10-3 Borosilicate glass 1.0*10-3 Plexiglass 5.7*10-3 Polystyrene 3.3*10-4 Teflon 1.5*10-4 SiC 0.02-1.05


Catalysts | Free Full-Text | Advanced Synthesis and ...

Vanadia/titania catalysts were synthesized by the equilibrium deposition filtration (EDF) method, which is a synthesis route that follows a molecular-level approach. The type of interfacial deposition as well as the interfacial speciation of the deposited oxo-V(V) species were determined by means of a model that takes into account experimental "proton-ion" curves and "adsorption …


Use of indigenous microwave system for dissolution and ...

12%The works related to high temperature processing were carried out with quartz vessel/tubes and alumina vessels. A microwave oven of 3,000 watts out put power was used for all the works and experiments. The microwave oven was modified suitably with a refluxing provision, where condensed acids were either poured back to the dissolution …


Advanced Microwaves Reactors with SRC Technology - Milestone

Reactions can be carried out directly in the 1L PTFE vessel, or in multiple vials. Vials are available in glass (disposable), quartz or PTFE, fitted with loose PTFE caps to ensure pressure equalization. Available rack configurations include 4, 5, 15 and 22 positions.


METHOD 3051A MICROWAVE ASSISTED ACID DIGESTION OF ...

5.3 This method requires microwave transparent and reagent resistant materials such as fluorocarbon polymers (examples are PFA or TFM) or quartz to contain acids and samples. For higher pressure capabilities the vessel may be contained within layers of different microwave transparent materials for strength, durability, and safety.


Microwave Digestion :: Anton-Paar.com

Superior trace elemental analysis begins with outstanding sample preparation. With over 40 years of experience Anton Paar strives to make microwave digestion easier and more convenient than ever before – thanks to sophisticated instrument and vessel concepts, state-of-the-art sensor technology, and the highest safety standards.