Stella Chemifa Corporation

Stella Chemifa Kabushiki Kaisha

Stella Chemifa Coporation

Masahide Waki

Hirohisa Kikuyama

Kazuhiro Miyamoto

Kazutaka Hirano

Shinji Hashiguchi

Kenji Aoki

Hirofumi Yazaki

Toshirou Fukudome

Tatsuhiro Yabune

Yasutaka Tashiro

Hiroto Izumi

Masatsugu Kawawaki

Yuko Murakami

Tetsuo Nishida

Kazuyuki Tohji

Hideki Nakashima

Masayuki Miyashita

Tomohiko Satonaga

Kazuhiko Shogami

Rui Hasebe

Takanobu Kujime

Hitoshi Tsurumaru

Kanenori Ito

Keiichi Nii

Yoshinori Nakagawa

Kazuyuki Fujimoto

Tomoyuki Deguchi

Yoshinori Satoh

Toshihisa Sakurai

Daisuke Sakai

Disclosed is a process for producing a fluoride gas that can produces fluoride gases such as BF, SiF, GeF, PFor AsFat a reduced production cost in a simple manner. The process is characterized in that a compound containing an atom, which, together with a fluorine atom, can form a polyatomic ion, is added to a hydrogen fluoride solution to produce the polyatomic ion in a hydrogen fluoride solution and to evolve a fluoride gas comprising the fluorine atom and the atom that, together with the fluorine atom, can form a polyatomic ion.

Process for producing fluoride gas

An object of the invention is to provide a tetrafluoroborate producing method that allows high-yield, high-efficiency production of a tetrafluoroborate by a continuous process, a tetrafluoroborate-containing electrolyte, and an electrical storage device including such an electrolyte. The invention provides a method for producing a tetrafluoroborate, which includes: a first step including dissolving boron trifluoride gas in an organic solvent; a second step including adding, to the organic solvent, a fluoride (MF, wherein M represents a metal or NH, and 1&#x2266;n&#x2266;3) in an amount stoichiometrically equivalent to or less than the amount of the boron trifluoride so that a tetrafluoroborate solution is produced; and a third step including circulating the tetrafluoroborate solution through the first step so that the boron trifluoride gas is dissolved in the tetrafluoroborate solution instead of the organic solvent.

Method for producing tetrafluoroborate

An object is to provide a method of manufacturing a hexafluorophosphate, that can simply and easily manufacture an inexpensive and high-quality hexafluorophosphate while suppressing the manufacturing cost, an electrolytic solution containing a hexafluorophosphate, and an electricity storage device including the electrolytic solution. The present invention relates to a method of manufacturing a hexafluorophosphate, which comprises reacting at least a phosphorus compound with a fluoride represented by MF.r(HF) (wherein 0&#x2266;r&#x2266;6, 1&#x2266;s&#x2266;3, and M is at least one kind selected from the group consisting of Li, Na, K, Rb, Cs, NH, Ag, Mg, Ca, Ba, Zn, Cu, Pb, Al and Fe) to produce a hexafluorophosphate represented by the chemical formula M(PF).

Process for production hexafluorophosphates

An object the invention is to provide a phosphorus pentafluoride producing process wherein phosphorus pentafluoride is separated/extracted from a pentavalent phosphorus compound or a solution thereof, or a composition obtained by allowing the pentavalent phosphorus compound or the solution thereof to react with hydrogen fluoride, thereby producing phosphorus pentafluoride; and a phosphate hexafluoride producing process wherein the resultant phosphorus pentafluoride is used as raw material to produce a phosphate hexafluoride high in purity. The present invention relates to a process for producing phosphorus pentafluoride, wherein a carrier gas is brought into contact with either of the following one: a pentavalent phosphorus compound, a solution thereof, or a solution in which a composition obtained by allowing the pentavalent phosphorus compound or the solution thereof to react with hydrogen fluoride is dissolved, thereby a phosphorus pentafluoride is extracted into the career gas.

Processes for producing phosphorus pentafluoride and phosphate hexafluoride

A production method of high purity silver tetrafluoroborate, capable of producing silver tetrafluoroborate (AgBF) at purity higher than the conventional, without using an organic solvent. The production method of the present invention is characterized in that the method comprises the step of: reacting silver fluoride with boron trifluoride in the presence of anhydrous hydrofluoric acid. Boron trifluoride is delivered into a solution obtained by dissolving or suspending silver fluoride in an anhydrous hydrofluoric acid solution.

Production method of high purity silver tetrafluoroborate

A method of manufacturing phosphorus pentafluoride and hexafluorophosphate can suppress the manufacturing cost and also can manufacture high-quality phosphorus pentafluoride from an inexpensive and low-quality raw material. The raw material for the method can include at least a phosphorus atom and a fluorine atom. These are brought into contact with a carrier gas, and a phosphorus pentafluoride is extracted and separated into the carrier gas. A method of manufacturing hexafluorophosphate includes reacting fluoride with the resulting phosphorus pentafluoride according to the following chemical reaction scheme: sPF+AF&#x2192;A(PF), in which s is in the range of 1&#x2266;s&#x2266;3, and A is at least one of the following: Li, Na, K, Rb, Cs, NH, Ag, Mg, Ca, Ba, Zn, Cu, Pb, Al and Fe.

Processes for production of phosphorus pentafluoride and hexafluorophosphates

In the manufacturing method of hexafluorophosphate (MPF: M=Li, Na, K, Rb, Cs, NH, and Ag) of the present invention, at least a HPOFaqueous solution, a hydrofluoric acid aqueous solution, and MF.r (HF) are used as raw materials (wherein, r&#x2267;0, 0&#x2266;x&#x2266;3, 0&#x2266;y&#x2266;4, and 0&#x2266;z&#x2266;6). According to the above description, a manufacturing method of hexafluorophosphate can be provided which is capable of manufacturing hexafluorophosphate (GPF: G=Li, Na, K, Rb, Cs, NH, and Ag) at a low cost in which the raw materials can be easily obtained, the control of the reaction is possible, and the workability is excellent.

Manufacturing method of hexafluorophosphate

Provided is a process for purifying a fluorine compound capable of yielding a highly pure fluorine compound by removing at least oxygen from a fluorine compound containing an oxygen compound as an impurity. In a process according to the present invention for purifying a fluorine compound, the following is brought into contact with the fluorine compound, which contains an oxygen compound as an impurity, thereby removing at least oxygen: carbonyl fluoride in an amount of a 0.1-fold equivalent or more and a 100-fold equivalent or less of oxygen atoms in the fluorine compound.

Process for purifying a fluorine compound

An isotope enrichment method comprising the step of performing the isotope exchange between an aqueous solution containing at least two components each represented by the formula: HO&#x2014;HSiF6.nSiF(wherein n&#x2267;0) and a gas containing SiFto enrich a stable Si isotope.

Isotope enrichment method

A carbon nanotube aggregate and a method for forming a carbon nanotube aggregate are provided. The carbon nanotube aggregate can be formed by treating carbon nanotubes with fluorine gas and sintering the resulting fluorinated carbon nanotubes. A carbon nanotube aggregate can be formed which does not contain a binder or resin matrix.

Method for forming a carbon nanotube aggregate

A fine treatment agent according to the present invention is a fine treatment agent for the fine treatment of a multilayer film, including a tungsten film and a silicon oxide film comprising at least one from among hydrogen fluoride, nitric acid, ammonium fluoride and ammonium chloride. Thus, a fine treatment agent which makes fine treatment on a multilayer film, including a tungsten film and a silicon oxide film, possible by controlling the etching rate and a fine treatment method using the same can be provided.

Fine treatment agent and fine treatment method using same

Provided is a method for purifying a quaternary alkyl ammonium salt enabling the obtainment of a particulate quaternary alkyl ammonium salt having a low water content at a high yield which is suitably used as an electrolyte in an electrolytic solution. The method for the purification of a quaternary alkyl ammonium salt comprises dispersing a quaternary alkyl ammonium salt to be purified into an organic solvent to allow it to form a suspension there. The alkyl groups constituting the quaternary alkyl ammonium salt have 1 to 5 carbon atoms each. The quaternary alkyl ammonium salt to be purified is dispersed into the organic solvent to make a suspension, and then the particles are washed with an alcohol solvent.

Method of purifying quaternary alkyl ammonium salt and quaternary alkyl ammonium salt

An object of the present invention is to provide a method for purifying a highly pure niobium compound and/or tantalum compound, the method enabling the purification of a highly pure niobium compound and tantalum compound in a simplified manner at a low cost. The object is met by providing a method comprising adding an organic solvent to an aqueous solution containing a niobium compound and/or tantalum compound together with impurities, and then performing extraction via the solution. A niobium compound and/or tantalum compound dissolved in a solution is allowed to precipitate, and said aqueous solution is obtained by dissolving the precipitate in water.

Purification method for producing high purity niobium compound and/or tantalum compound

The present invention provides a method enabling the high purification of a niobium compound and/or tantalum compound in a simplified manner at a low cost. This is accomplished by providing a method enabling the high purification of a niobium compound and/or tantalum compound comprising the steps of preparing a solution containing niobium and/or tantalum, allowing a precipitate comprising niobium and/or tantalum to develop, separating the precipitate by filtration from the filtrate, converting the precipitate to a liquid melt or taking the filtrate, and separating a niobium compound from a tantalum compound or vice versa by utilizing the difference in solubility to the solvent between the niobium compound and the tantalum compound.

In order to provide a method for producing lithium hexafluorophosphate capable of producing lithium hexafluorophosphate of a higher purity than in the related art without the necessity for after-treatment for removal of impurities, a method is characterized by filtering lithium hexafluorophosphate coexisting with a solvent and then carrying out after-filtering drying in a gas atmosphere containing PF.

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Osaka, Japan

Masahide Waki