Kanto Denka Kogyo Co., Ltd.

Hayashibara Co., Ltd.

Go Takikawa

Osamu Omae

Shinsuke Katayama

Mutsuko Taniguchi

Tatsuya Ishihara

Kiyomi Aizawa

Disclosed is a method for producing phosphorus pentafluoride, including mixing and reacting phosphorus trichloride and chlorine with a large excess of anhydrous hydrogen fluoride liquid, thereby producing phosphorus pentafluoride, wherein heat of reaction generated through the production of phosphorus pentafluoride is removed with latent heat of evaporation of hydrogen fluoride. It is preferable that the anhydrous hydrogen fluoride liquid is circulated, and, in this state, phosphorus trichloride and chlorine are mixed with the anhydrous hydrogen fluoride liquid. Furthermore, it is also preferable that the anhydrous hydrogen fluoride liquid is circulated along a circulation path, or that the anhydrous hydrogen fluoride liquid is circulated through stirring in a reaction vessel.

Method for producing phosphorus pentafluoride

[Object] The present invention aims to provide an external dermal agent that tightens the skin, lifts up sagging skin, has no stickiness to the skin, and has a satisfactory compatibility with the skin, without giving any unfavorable feeling to users. [Means to Attain the Object] The present invention solves the above object by providing an external dermal agent characterized in that it contains pullulan and an alkaline-swelling polymer in a mass ratio of the pullulan to the alkaline-swelling polymer being 10 or more.

External dermal agent

In a method for gas-flow carrying a solid particle, the solid particle includes a solid substance generating a dissociation equilibrium reaction that dissociates at least one type of gas component, and the solid particle is carried by a gas flow containing the gas component. The average particle diameter of the solid particle is preferably 0.1-1.0 mm. The solid particle is preferably carried by the gas flow in the state of a suspended flow, a fluidized flow, or a plug flow. The solid particle preferably includes a solid substance to generate a dissociation equilibrium reaction that dissociates at least one gas component and at least one solid component, and the solid particle is preferably carried by the gas flow in a carrying pipe and the solid particle or the solid component that has adhered to the interior surface of the carrying pipe is removed by the gas flow.

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Okayama, Japan

Go Takikawa