Abstract: Provided are a method for producing hydrocyanic acid and a device for producing hydrocyanic acid, which can improve a yield of the hydrocyanic acid in a vapor phase contact ammoxidation reaction of methanol. The method for producing hydrocyanic acid includes a step of obtaining hydrocyanic acid by a vapor phase contact ammoxidation reaction by supplying a raw material gas including methanol in a fluidized bed reactor (1) through a raw material gas disperser (7) disposed in the fluidized bed reactor (1) and bringing the methanol into contact with ammonia and oxygen in the presence of a metal oxide catalyst, in which the raw material gas disperser (7) has one or more pores for releasing the raw material gas into the fluidized bed reactor (1), and the number of pores per unit cross-sectional area of the fluidized bed reactor (1) is 10 to 45 pieces/m2.

Abstract: A virtual space display system for a self-driving moving body displays a virtual space different from a real environment such that a passenger on the moving body can enjoy the virtual space without feeling strange for a motion. The system includes a display device, a surrounding situation detector, and a virtual space display unit. The surrounding situation detector obtains information specifying features that influence a path along which the moving body is to move, and specifies such an important feature among features located in the surrounding of the moving body that presence/absence of the important feature has an influence on the path of the moving body. The virtual space display unit converts the important feature into an object that is fit for the influence on the path of the moving body based on a predetermined rule, and causes the display device to display the virtual space including the converted object.

Abstract: Provided are an industrially advantageous method for separating and purifying isobutylene, the method enabling high-purity isobutylene to be efficiently obtained by a simple process, and a method for producing isobutylene. A method for separating and purifying isobutylene from a reaction gas containing the isobutylene and unreacted isobutanol, comprising: a step (1) of contacting the reaction gas containing the isobutylene and unreacted isobutanol with a first solvent to obtain a first gas containing the isobutylene and a recovered solution containing the unreacted isobutanol; a step (2) of contacting the first gas with a specific second solvent to allow the second solvent to absorb the isobutylene contained in the first gas to obtain an absorption solution containing the isobutylene; and a step (3) of distilling the absorption solution to obtain separated and purified isobutylene. A method for producing isobutylene using the separation and purification method.

Abstract: Provided are an industrially advantageous method for separating and purifying isobutylene, the method enabling high-purity isobutylene to be efficiently obtained by a simple process, and a method for producing isobutylene. A method for separating and purifying isobutylene from a reaction gas containing the isobutylene and unreacted isobutanol, comprising: a step (1) of contacting the reaction gas containing the isobutylene and unreacted isobutanol with a first solvent to obtain a first gas containing the isobutylene and a recovered solution containing the unreacted isobutanol; a step (2) of contacting the first gas with a specific second solvent to allow the second solvent to absorb the isobutylene contained in the first gas to obtain an absorption solution containing the isobutylene; and a step (3) of distilling the absorption solution to obtain separated and purified isobutylene. A method for producing isobutylene using the separation and purification method.

Abstract: A virtual space display system for a self-driving moving body displays a virtual space different from a real environment such that a passenger on the moving body can enjoy the virtual space without feeling strange for a motion. The system includes a display device, a surrounding situation detector, and a virtual space display unit. The surrounding situation detector obtains information specifying features that influence a path along which the moving body is to move, and specifies such an important feature among features located in the surrounding of the moving body that presence/absence of the important feature has an influence on the path of the moving body. The virtual space display unit converts the important feature into an object that is fit for the influence on the path of the moving body based on a predetermined rule, and causes the display device to display the virtual space including the converted object.