摘要:
The invention aims at providing, without using an expensive and rare material, platinum black which is effectively inhibited from being poisoned with CO, H2S, SO4, or HCHO and a method for fluorination of platinum black. The platinum black is characterized by fluorine adsorbed on the surface thereof. The method for fluorination of platinum black is characterized by allowing platinum black to stand in an inert gas/fluorine mixed gas atmosphere in a chamber under a reduced pressure to make fluorine adsorbed on the surface of the platinum black.
摘要:
To provide a cross-linked structure of a carbon material, which is excellent in mechanical strength such as tensile strength, and a method for producing the same. The cross-linked structure of a carbon material according to the present invention is a cross-linked structure of a carbon material, in which carbon materials such as carbon nanotube, graphite, fullerene, and carbon nanocoil are cross-linked with each other, characterized in that the carbon materials are cross-linked through a linking group derived from a nucleophilic compound having two or more nucleophilic groups in the molecule. Thereby, it is possible to provide a cross-linked structure of a carbon material, which is excellent in mechanical strength such as tensile strength.
摘要:
Provided is a method for purifying a difluorophosphate, in which a difluorophosphate is purified to a high purity. The method includes a method for purifying a difluorophosphate, comprising bringing hydrogen fluoride into contact with a difluorophosphate containing an impurity and subsequently heating and drying the difluorophosphate, or bringing the hydrogen fluoride into contact with the difluorophosphate containing the impurity while heating and drying the difluorophosphate containing the impurity, thereby removing the impurity.
摘要:
Provided is a fine-processing agent which, when fine-processing a laminated film stacked at least with a silicon dioxide film and a silicon nitride film, can selectively fine-process the silicon dioxide film. Also provided is a fine-processing method utilizing the fine-processing agent. The fine-processing agent is characterized by including: (a) 0.01-15.0 weight % hydrogen fluoride and/or 0.1 to 40.0 weight % ammonium fluoride, (b) water, and (c) 0.001-10.00 weight % water-soluble polymer selected from among a group consisting of acrylic acid, ammonium acrylate, acrylic acid ester, acrylamide, styrenesulfonic acid, ammonium styrenesulfonate, and styrenesulfonic acid ester.
摘要:
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 carrier gas.
摘要:
A process for phosphorus pentafluoride production by which high-purity phosphorus pentafluoride can be produced by a simple and economical procedure without the need of a large-scale purification apparatus or high-pressure apparatus and without generating a large amount of a by-product gas requiring a special discharge-gas treatment. The process for phosphorus pentafluoride production is characterized by introducing hydrogen fluoride and a hexafluorophosphate (MPF 6 ) into a vessel and reacting them according to the reaction shown by the scheme (1) to yield phosphorus pentafluoride. MPF 6 + uHF †’ PF 5 + MF r(HF) (Scheme 1) In the scheme, M is at least any one of Li, Na, K, Rb, Cs, NH 4 , and Ag; 0 ‰¤ r ‰¤ u; and the HF is used in an amount not smaller than the stoichiometric amount.