Method for producing hydrocyanic acid and device for producing hydrocyanic acid

A method for producing hydrocyanic acid, comprising:

• obtaining hydrocyanic acid by a vapor phase contact ammoxidation reaction by supplying a raw material gas containing methanol in a fluidized bed reactor through a raw material gas disperser disposed in the fluidized bed reactor, and
• bringing the methanol into contact with ammonia and oxygen in the presence of a metal oxide catalyst,
• wherein the raw material gas disperser comprises a pipe disperser including:
• a header extending in a horizontal direction,
• a plurality of branch pipes attached to the header,
• a plurality of rectifier pipes attached to one of the plurality of branch pipes,
• one or more pores formed at at least one of the plurality of rectifier pipes configured to release the raw material gas into the fluidized bed reactor through the rectifier pipes, and
• a number of pores per unit cross-sectional area of the fluidized bed reactor is 10 to 45 pieces/m2.