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779 results about "Compounds of fluorine" patented technology

Fluorine forms a great variety of chemical compounds, within which it always adopts an oxidation state of −1. With other atoms, fluorine forms either polar covalent bonds or ionic bonds. Most frequently, covalent bonds involving fluorine atoms are single bonds, although at least two examples of a higher order bond exist. Fluoride may act as a bridging ligand between two metals in some complex molecules. Molecules containing fluorine may also exhibit hydrogen bonding (a weaker bridging link to certain nonmetals). Fluorine's chemistry includes inorganic compounds formed with hydrogen, metals, nonmetals, and even noble gases; as well as a diverse set of organic compounds. For many elements (but not all) the highest known oxidation state can be achieved in a fluoride. For some elements this is achieved exclusively in a fluoride, for others exclusively in an oxide; and for still others (elements in certain groups) the highest oxidation states of oxides and fluorides are always equal.

Plasma reactor apparatus with multiple gas injection zones having time-changing separate configurable gas compositions for each zone

A plasma reactor for processing a workpiece such as a semiconductor wafer has a housing defining a process chamber, a workpiece support configured to support a workpiece within the chamber during processing and comprising a plasma bias power electrode. The reactor further includes plural gas sources containing different gas species, plural process gas inlets and an array of valves capable of coupling any of said plural gas sources to any of said plural process gas inlets. The reactor also includes a controller governing said array of valves and is programmed to change the flow rates of gases through said inlets over time. A ceiling plasma source power electrode of the reactor has plural gas injection zones coupled to the respective process gas inlets. In a preferred embodiment, the plural gas sources comprise supplies containing, respectively, fluorocarbon or fluorohydrocarbon species with respectively different ratios of carbon and fluorine chemistries. They further include an oxygen or nitrogen supply and a diluent gas supply. The controller is programmed to produce flow of different process gas species or mixtures thereof through different ones of said plural gas injection zones. The controller is further programmed to change over time the species content of the gases flowing through different ones of said plural gas injection zones.
Owner:APPLIED MATERIALS INC

Environment-friendly separation and recovery method of fluorine in fluorine-containing waste liquid

The invention discloses an environment-friendly separation and recovery method of fluorine in a fluorine-containing waste liquid. According to the invention, a magnesium-containing compound is added into the fluorine-containing waste liquid as a precipitation agent, such that fluorine in the waste liquid is selectively precipitated; filtering is carried out, and fluorine-removed liquid and magnesium fluoride precipitate are obtained; the fluorine-removed liquid is used in waste water recycling; the magnesium fluoride precipitate is decomposed with sulfuric acid, such that a series of compounds of fluorine are obtained; decomposition residue is subjected to a dissolution-crystallization treatment, such that magnesium sulfate crystals are obtained; the obtained magnesium sulfate crystals are returned and recycled in the fluorine selective precipitation process; the crystallization mother liquor of magnesium sulfate is returned to the dissolution-crystallization process or the magnesium fluoride precipitation decomposition process. The method has the advantages of simple process, simple operation, low production cost, and good fluorine-removing effect. With the method, fluorine resource utilization is realized. The method also has the advantages of no fluorine-containing waste production and no three-waste emission.
Owner:CENT SOUTH UNIV

Halogen-flame retardant and application thereof

The invention belongs to the field of flame retardant technology and provides a halogen-frame retardant. The halogen-flame retardant comprises a first component and a second component. The first component is composed of a main flame retardant and an auxiliary flame retardant. The main flame retardant is selected from a brominated flame retardant and a chlorinated flame retardant; and the auxiliaryflame retardant is a fluorine compound. The second component is a flame-retardant synergistic compound, selected from metal oxides of the group IIIA, IVA, VA metals in the periodic table of the elements or salt thereof, transition metal oxide, a silicon-based flame retardant, a phosphorus-based flame retardant and a nitrogen-based flame retardant. The invention also provides a resin composite material, an elastomer composite material and a relative formed body containing the halogen-frame retardant, a coating medium and related part or structural body, and an impregnated material. The invention has the following beneficial effects: the technical bias that fluoride cannot effectively perform the flame-retardant effectiveness and then cannot be used or is hard to be used as a flame retardant is corrected; the actual usage of the brominated flame retardant and / or the chlorinated flame retardant is reduced, and then the production difficulty of the flame retardant and the environmental pollution are reduced, and the color matching and cost control difficulty is reduced.
Owner:BENSONG ENG PLASTICS HANGZHOU
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