摘要:
A process and an apparatus for manufacturing a fine powder of metals or ceramics are proposed in which a mixed gas of volatile metal compound and/or evaporated metal and a reaction gas is reacted in a discharged state while heating by laser beam.
摘要:
A plasma reactor system is described in which modularity is enhanced through automatic shutoff valves for gas lines, enabling components to be exchanged readily. Gas lines are routed through a connector at a predetermined location for all modules. The connector comprises a valve member for each line.
摘要:
A system and a method of nitrogen fixation is disclosed in which nitrogen and other gases such as oxygen are electrically activated and reacted on a catalyst-like material to provide a fixed nitrogen product in such a way that the reactant gases are first placed into an excited state by a single electrode electric discharge acting on a gas stream and then by means of the stream the reactants are contacted on the catalyst-like material on which they are then combined and the product compounds which are thereby formed are shielded by the same catalytic material from ultra violet radiation generated by the electric excitation, said shielding being to prevent subsequent disassociation of the product compounds, and the gas stream emerging on the downstream side of the catalyst carries the products to an absorption bed on which they are absorbed and concentrated and then reacted with a periodic flow of hydrogen to provide ammonia. In an alternate embodiment the products absorbed on the bed are first desorbed and then reacted with hydrogen.
摘要:
Method and apparatus for improved uniformity in an externally excited non-thermal chemical reaction process. In the inventive process, the reactant is externally activated for a time short compared with the time during which reactant depletion would otherwise occur. The reactant is then deactivated for a period of time comparable to the transit time across the workload. In this way improved uniformity is obtained by reducing the depletion of the reactant as it flows across the workload.
摘要:
A high temperature reactor is fitted with a plasma gun at an anode chamber and is provided with a graphite cathode. The reactor is cooled by means of pipes in the refractory lining of the reactor, and rests on essentially horizontal bearings. The charge to be melted e.g. oxides or oxide mixtures is fed from above at an angle .alpha. at most 90.degree. to the main axis of the reactor in the direction of the plasma stream, and the molten product is tapped off at an exit port which is also close to the entry port of the plasma stream so that the plasma stream covers and therefore heats the area around the exit port.
摘要:
A method of heating a gas, particularly a chemically reactant ionized gas, designed, in particular, for producing lower olefins and industrial hydrogen from hydrocarbon stock, wherein the gas is mixed with an intermediate heat carrier gas plasma jet and heated additionally with a rotary electric arc.
摘要:
Trifluoromethyl-substituted compounds are formed in a corona discharge or glow discharge plasma of trifluoromethyl radicals from an organic trifluoromethyl source. A substrate possessing easily replaceable ligands such as halogen or carbonyl, is initially contacted either in the plasma and within a short distance from a downstream visible edge of the plasma or outside of the visible portion of the plasma and within a short distance from the downstream visible edge, to effect a substitution of the halogen or carbonyl ligand on the substrate with a trifluoromethyl radical without substantial decomposition of the substrate.
摘要:
Allyl amine and chemically related compounds are polymerized as thin films in the presence of a plasma discharge. The monomer compound can be polymerized by itself or in the presence of an additive gas to promote polymerization and act as a carrier. The polymerized films thus produced show outstanding advantages when used as reverse osmosis membranes.
摘要:
In the process of carrying out high temperature, chemical reactions including reductins for producing elemental metal powders, especially refractory metals; chlorinations for producing halogens and for chemical synthesis in general using a plasma genertor, the reactant or reactants feed material is introduced into the reaction zone of the apparatus and the effluent from the reaction zone is directed into a quenching zone through a selectively variable passageway or orifice in a manner that permits in the reduction process separation of the desired reaction product from the effluent hot gas stream and the continuous collection of the reaction product in a collection zone wherein in some instances, the reaction product is of a selected characteristic, controlled by the maintenance of certain operational parameters, including a selected differential fluid pressure in the reaction and collection zone as well as reaction and collection zone temperatures. Apparatus for carrying out the high temperature chemical reactions is disclosed.
摘要:
Improvement in plasma generating apparatus in which the plasma-generating zone and downstream reaction zone are cooled by a cooling jacket surrounding the walls of the reaction vessel.