Method for preparing azo compound

A method for preparing azo compound, comprising:

• a first step for producing an Xb molecule by electrolyzing, in a reaction system, a first solution including a hydrazo compound and at least one type of MaXb;
• a second step for oxidizing the hydrazo compound with the generated Xb molecule to obtain a second solution including an azo compound, MaXb, and HX;
• a third step for discharging the second solution outside the reaction system, and separating therefrom a third solution including MaXb and HX to obtain a solid azo compound;
• and
• a fourth step for introducing the third solution and an additional hydrazo compound equivalent to the hydrazo compound into the reaction system, and electrolyzing a fourth solution including the additional hydrazo compound, MaXb, and HX to produce an Xb molecule,
• wherein the fourth step, the second step, and the third step are collectively defined as a single cycle, and the cycle is performed repeatedly, and
• wherein:
• the X is a halogen element;
• the M is at least one selected from the group consisting of hydrogen, Li, Na, K, Mg, Ca, Mn, Fe, Ni, Cu, Ag, Zn, Sn, Zr, and Ti, or at least one selected from the group consisting of a primary ammonium ion, a secondary ammonium ion, and a tertiary ammonium ion;
• the H is hydrogen;
• and
• a and b are each independently any one integer from 1 to 4.