Method for producing carbodiimide compound

A method for producing a carbodiimide compound, comprising:

• a carbodiimide production step of reacting an aliphatic tertiary isocyanate compound (A) in the presence of an organic alkali metal compound (B) having Lewis basicity, and
• an adsorption and removal step of performing adsorption and removal of the organic alkali metal compound (B) having Lewis basicity, with an adsorbent (E), after the carbodiimide production step;
• and
• wherein the adsorbent (E) is at least one of a synthetic aluminum silicate-based adsorbent, synthetic magnesium silicate, an acidic cation-exchange resin, a basic anion-exchange resin, alumina, a silica gel-based adsorbent, a zeolite-based adsorbent, hydrotalcites, a magnesium oxide-aluminum oxide-based solid solution, aluminum hydroxide, magnesium oxide, and an aluminum hydroxide-sodium hydrogen carbonate coprecipitate (dawsonite).