106results about "Fluorine" patented technology

Plasma is generated using elemental hydrogen, a weak oxidizing agent, and a fluorine containing gas. An inert gas is introduced to the plasma downstream of the plasma source and upstream of a showerhead that directs gas mixture into the reaction chamber where the mixture reacts with the high-dose implant resist. The process removes both the crust and bulk resist layers at a high strip rate, and leaves the work piece surface substantially residue free with low silicon loss.

The present invention pertains to methods for removing unwanted material from a work piece. More specifically, the invention pertains to stripping photo-resist material and removing etch-related residues from a semiconductor wafer during semiconductor manufacturing. Methods involve implementing a hydrogen plasma operation with downstream mixing with an inert gas. The invention is effective at stripping photo-resist and removing residues from low-k dielectric material used in Damascene devices.

A step (1) of heating a fluoronickel compound to release a fluorine gas, a step (2) of allowing a fluorine gas to be occluded into a fluorinated compound, and a step (3) of heating the fluoronickel compound and reducing an inner pressure are conducted in a container, respectively, at least once, and thereafter a high-purity fluorine gas is obtained in the step (1). Also, a step (5) of heating a fluoronickel compound and reducing an inner pressure and a step (6) of allowing a fluorine gas reduced in a hydrogen fluoride content to be occluded into the fluoronickel compound are conducted in a container having a fluorinated layer formed on its surface, respectively, at least once, the step (5) is further conducted, and thereafter a fluorine gas containing impurity gases is contacted with the fluoronickel compound to fix and remove the fluorine gas, and the impurities are analyzed by gas chromatography.

A fluorine gas generator is provided with which the gases used and/or generated, in case of leakage thereof, can be prevented from mixing together as far as possible and, even in case of gas leakage into the outside of the generator system, the leakage gas can be treated safely and in which the maintenance, exchange and other operations are easy to carry out. The generator comprises a box-shaped body containing an electrolyzer for fluorine gas generation, and the box-shaped body is divided into two or more compartments, including a compartment containing the electrolyzer.

A method producing a volume of purified F₂ comprising removing HF from a F₂ feed and removing CF₄ from the F₂ feed, wherein a concentration of HF in the volume of purified F₂ is less than 1 ppm (v/v) and a concentration CF₄ in the volume of purified F₂ is less than 10 ppm (v/v).

A process, composition and apparatus for the removal of impurities from corrosive gases, particularly halogen-containing gases, down to about 100 ppb concentration are described. The critical component is zirconia (ZrO₂), which in a variety of physical forms is capable of dehydrating such gases. The zirconia can be in the form of a coating on a substrate, as a granular bulk material, or deposited within the pores of a porous body. The zirconia is retained in a simple container which is easily installed in a gas supply line, such as to a gas- or vapor-deposition manufacturing unit. The purification process can be operated for long periods of time in the presence of these gases. The invention provides final purification to gas streams intended for gas- or vapor-deposition formation of high purity electronic, prosthetic or similar products, and can be used in combination with a preliminary dehydration process or a solid particulate removal unit upstream.

In some aspects, an apparatus is provided for abating perfluorocarbons (PFCs) in a controlled decomposition oxidation (CDO) thermal reaction chamber. The apparatus includes (1) a cartridge insertable into the thermal reaction chamber having gas-permeable first and second ends and including a catalyst material; and (2) thermally-conductive fixtures positioned within the cartridge. Numerous other aspects are provided.

The invention relates to a method and device for preparing high-purity fluorine gas or high-purity fluorine-containing mixed gas and belongs to the technical field of fluorine chemicals. The method comprises the following steps: pressurizing fluorine gas made by electrolysis or fluorine-containing mixed gas blended by the fluorine gas made by electrolysis to positive pressure, filtering, and sequentially performing primary condensation and secondary condensation, wherein the temperature of the primary condensation is 60-100 DEG C below zero, and the temperature of the secondary condensation is 120-180 DEG C below zero. The purity of the fluorine gas product obtained by the method is 99.9% or higher, and the fluorine gas requirements for production in the existing electron industry and fine chemical engineering are met; the purity of the obtained fluorine-containing mixed gas is 99.9% or higher, and the production requirements of fluorine-containing special gases are met; and the quality of the fluorine gas product is wholly improved, the application market is expanded, the reject ratio of downstream finished products caused by low purity of the fluorine gas or fluorine-containing mixed gas in the production process is reduced, and the method has high economic values and wide application prospects.

A microscale solution for conducting [¹⁸F]fluoride phase transfer and subsequent radiosynthesis of 2-[¹⁸F]FDG that eliminates the azeotropic drying process. [¹⁸F]fluoride phase transfer is performed using an inexpensive disposable microchip. Additionally, each subsequent each step may be performed on the same single microchip.

In certain aspects, a system is provided for abating perfluorocarbons (PFCs) from a gaseous waste stream that includes (1) a wet scrubber adapted to scrub a gaseous waste stream and having an outlet adapted to discharge a scrubbed gaseous waste stream; and (2) a controlled decomposition oxidation (CDO) system. The CDO system includes a CDO thermal reaction chamber that includes (a) an inlet coupled to the outlet of the wet scrubber; (b) a catalyst bed adapted to abate PFCs within the CDO thermal reaction chamber; and (c) an outlet. Numerous other aspects are provided.

The invention discloses a recovery method of an aluminum electrolysis waste cathode carbon block. The method comprises the following steps: (1) crushing and screening waste cathode carbon blocks to obtain carbon particles, (2) mixing the carbon particles with a sulfuric acid solution to obtain slurry A, and then performing pressure leaching to obtain slurry B, (3) evaporating and concentrating theslurry B until the mass percent of water is lower than 8% to obtain slurry C, (4) adding concentrated sulfuric acid into the slurry C to obtain slurry D, roasting at 150-300 DEG C for 0.5-10 hours, and roasting at 300-600 DEG C for 0.5-8 hours to obtain roasted carbon, and (5) mixing and leaching the roasted carbon and a leaching agent, and filtering and washing to obtain purified carbon. In thetreatment process, high-temperature fluorine-containing flue gas and fluorine-containing wastewater are not generated, and fluorine, aluminum and carbon materials can be recycled, so that comprehensive recycling and cleaning treatment on the aluminum electrolysis waste cathode carbon block are realized.

A radioactive fluoride anion concentrating device capable of concentrating ¹⁸F⁻ ions speedily and efficiently. A flow cell (11) is composed of a metal plate electrode (21), an insulating sheet (23) and a carbon plate electrode (25) located so that the sides of electrodes may be opposed to each other with the insulating sheet (23) inserted between them. An example of the plate metal plate electrode (21) is obtained by forming a film of metallic material on an insulation plate, and an example of the insulating sheet (23) is a PDMS from which a groove being a channel (26) having a thickness of ≦500 μm is cut out. The thickness of the sheet is desirably about 100 μm. The upper and lower sides of the flow cell (11) are fixed by fixing jigs (27) and (29).

The present invention relates to a fire metallurgy method for converting the waste slot liner or other harmful material from the aluminum production industry to the glass clinker clew of amorphous fluorine-bearing sodium aluminosilicate and amorphous fluorine-bearing aluminum calcium silicate and converting to the high-carbon material and the device. The raw materials of waste slot liner, silicon dioxide or siliceous material and calcium oxide are added to the non-burner end of the counterflow rotary burner. The material is heated to destroy the cyanide, the salt fluoride is converted to calcium fluoride and forms a homogeneous liquid material. Then the carbon is physically separated from the material. Afterwards the material is glassed to generate the valuable glass clinker clew and high-carbon material.

A device and process for fluorine recovery from smoke after phosphorus absorption by hydration in KPA, wherein the device comprises a first-stage and second-stage fluorine absorption tower, which are both fluidised counter-current washing towers. The device according to the present invention has simple structure, low investment cost, high raw material utilization rate, and good fluorine recovery effects.

The invention provides a method for purifying fluorine gas, wherein the fluorine gas is obtained by electrolyzing fuse salt in an electrolyzer, and the fluorine gas to be purified, obtained through electrolysis, is introduced into a heat exchange device having the operation pressure being 0-0.5MPa and the internal temperature being minus 10 DEG C to minus 100 DEG C, and is then adsorbed by a fluoride. According to the method provided by the invention, the pressure of the heat exchange device and the pressure of an electrolytic bath are the same, so that the system is convenient to control; the equipment is simple in structure, and conventional heat exchanger and adsorption column can be used without increasing the reforming cost; and with the adoption of the method disclosed by the invention, the fluorine gas without HF can be obtained after fluorine preparation based on electrolysis, and HF can be recovered at the same time.

A process and an apparatus for treating exhaust gases, comprising an aeration stirring tank (5) employing an aqueous alkaline liquid, and, as a posterior stage, a gas-liquid contact device (7) and/or a packed column (11). The apparatus can remove at the posterior stage harmful gases that the aeration stirring tank fails to remove, for example, water-soluble organic compounds such as ethanol, halogenated silicon compounds such as SiCl₄, and halogen gases such as F₂ and Cl₂. The process and apparatus are particularly suitable for purifying exhaust gases discharged from a semiconductor production device.

The invention relates to a fluorine gas purifying filler and a preparation method and application thereof, the filler is a fluoride salt filler, and the fluoride salt is a mixture of one or more of sodium fluoride, potassium fluoride, calcium fluoride, magnesium fluoride, lithium fluoride. The filler is prepared from the fluoride salt and hydrofluoric acid with a concentration of no less than 5% by mixing, reaction, curing, molding, air-drying and roasting, the internal porosity of the filler is 40%-60%, has the characteristics of large porosity and strong skeleton, and has the characteristics of strong adsorption and good purification effect when used in fluorine gas purification, and the preparation method of the fluorine gas purifying filler is simple and easy to implement.

Combustion fuel stream supply systems for use with pressure swing adsorption (PSA) assemblies, and hydrogen-generation assemblies and/or fuel cell systems containing the same. The PSA assemblies are operated according to a PSA cycle to receive a mixed gas stream and, while producing a product hydrogen stream therefrom, intermittently discharge a byproduct stream. The byproduct stream, when available, may be delivered as a fuel stream to a heating assembly, which may heat the hydrogen-producing region that produces the mixed gas stream. A combustion fuel stream supply system selectively supplies an auxiliary fuel stream when a byproduct stream is not discharged or otherwise does not have a predetermined combustion fuel value sufficient, when combusted, to maintain the hydrogen-producing region within a desired temperature range. The one or more streams supplied to the heating assembly have a combined combustion fuel value at least as great as the predetermined threshold value.

The invention discloses a high-efficiency purifying device and a high-efficiency purifying process for fluorine. The high-efficiency purifying device for the fluorine comprises a feeding cabin, a spiral feeder, a fluorine pressurizing pump, a fluorine jet head, a conical reactor, filters and a spiral regenerative reactor, and is characterized in that after being pressurized,the fluorine is jetted to entrain a powder adsorbent through the jet head; the fluorine and the powder adsorbent form a gas/solid turbulent cluster; and the powder adsorbent adsorbs hydrogen fluoride entrained in the fluorine. A pure product is obtained after dust in purified fluorine is filtered through the filters. The adsorbent sinks to the bottom of the reactor, and enters the spiral regenerative reactor for heating and regenerating through an airtight material cabin. The hydrogen fluoride is desorbed from the adsorbent, is attracted through an external negative pressure device, is filtered and gathered through a plurality of gas branch pipe filters, and flows out from the spiral regenerative reactor. The regenerated adsorbent is transmitted through an external device and is returned to the material cabin for recycling. The high-efficiency purifying device and the high-efficiency purifying process for the fluorine realize high-efficiency purifying of industrial fluorine, and have the advantages of reliable process, stable product quality and the like.

A fluorine gas manufacturing plant wherein F₂ is manufactured by the electrolysis of KF/HF compositions. The plant comprises skid modules for: HF storage, the electrolytic cells, storage and purification of the manufactured F₂ raw gas, for fluorine gas delivery including a single buffer tank or multiple storage units, scrubbers to provide purified waste gas, for providing cooling water circuits, analysis, electrical rectifiers, an electrical sub-station with transformers and emergency supply, and for utilities including a control room with laboratory and a rest room for the personnel. The advantage of the skids is that they can be separately manufactured in workshops, tested, transported to the facility and assembled there. A great advantage is the safety aspect, a reliable F₂ production for 24 hours and 7 days a week of high purity F₂.