Abstract: A method for producing an aqueous dispersion of a fluorine-containing elastomer, which includes polymerizing a fluorine-containing monomer in the presence of an aqueous medium and a fluorine-containing compound (A), wherein the fluorine-containing elastomer contains a methylene group in a main chain, the fluorine-containing compound (A) is a compound represented by general formula (A): CXiXk?CXjRa—(CZ1Z2)k—Y3??(A) wherein Xi, Xj, and Xk are the same or different and are F, Cl, H, or CF3; Y3 is a hydrophilic group; Ra is a linking group; Z1 and Z2 are the same or different and are H, F, or CF3; and k is 0 or 1; provided that at least one of Xi, Xk, Xj, Ra, Z1, and Z2 includes F; and the number of carbon atoms in a portion excluding the hydrophilic group is 6 or less, and the fluorine-containing compound (A) is fed after polymerization is initiated.

Abstract: Provided is a vehicle seat that can absorb energy with a link while maintaining engagement of gears in a lifting device. One embodiment of the present disclosure is the vehicle seat including a seat cushion, a cushion frame supporting the seat cushion, and the lifting device configured to raise and lower at least a portion of the seat cushion. The lifting device includes a pinion gear held by the cushion frame, a sector gear engaged with the pinion gear, and the link to which the sector gear is fixed and which is rotatably coupled to the cushion frame. The link is made of a material with a lower yield stress than a material forming the sector gear.

Abstract: Disclosed is a method for producing a fluoroalkanesulfonic acid including (1) the step of reacting concentrated sulfuric acid and/or fuming sulfuric acid with a fluoroalkanesulfonate to cause an acid decomposition, thereby obtaining a reaction mixture containing the fluoroalkanesulfonic acid and a sulfur component; and (2) the step of adding an oxidizing agent to the reaction mixture obtained by the above step and then conducting a distillation, thereby obtaining the fluoroalkanesulfonic acid from the reaction mixture. It is possible by this method to efficiently reduce the sulfur component, thereby industrially advantageously obtaining fluoroalkanesulfonic acid of high purity.

Abstract: A fluorine gas generating device comprises an electrolytic tank that generates at an anode side a main-product containing as a main component fluorine gas and at a cathode side a by-product gas containing as a main component hydrogen gas by subjecting, in an electrolytic bath, hydrogen fluoride in a molten salt containing therein hydrogen fluoride to an electrolysis; a hydrogen fluoride supply source that stores therein hydrogen fluoride that is to be fed to the electrolytic tank to fill up hydrogen fluoride; a hydrogen fluoride supply passage through which hydrogen fluoride flows from the hydrogen fluoride supply source to the electrolytic tank; and a vaporizer that is connected to the hydrogen fluoride supply passage to vaporize hydrogen fluoride supplied from the hydrogen fluoride supply source.

Abstract: Disclosed is a method for producing a fluoroalkanesulfonic acid including (1) the step of reacting concentrated sulfuric acid and/or fuming sulfuric acid with a fluoroalkanesulfonate to cause an acid decomposition, thereby obtaining a reaction mixture containing the fluoroalkanesulfonic acid and a sulfur component; and (2) the step of adding an oxidizing agent to the reaction mixture obtained by the above step and then conducting a distillation, thereby obtaining the fluoroalkanesulfonic acid from the reaction mixture. It is possible by this method to efficiently reduce the sulfur component, thereby industrially advantageously obtaining fluoroalkanesulfonic acid of high purity.

Abstract: A production process of a trialkylphosphine according to the present invention includes: a first step of forming a trialkylphosphine by reaction of an organic metal compound and an organic phosphorous compound in an ether solvent having a difference in boiling point with the trialkylphosphine formed such that the difference in boiling point is in a range of 0° C. to 20° C.; a second step of obtaining a silver complex by absorption of a gas phase of the first step into an aqueous solution of AgI and KI; a third step of heating the silver complex obtained in the second step, in a metallic reaction vessel, at a temperature of 170° C. to 350° C. in a reduced pressure atmosphere of 1.333×10?7 MPa to 6.133×10?2 MPa; and a fourth step of cooling a gas product of the third step at a very low temperature range of ?196° C. to ?50° C. to trap the trialkylphosphine.