It is used as an ingredient in the production of grass jelly, a food consumed in Chinese and Southeast Asian cuisines. German gingerbread recipes often use potassium carbonate as a baking agent.
Potassium carbonate is being used as the electrolyte in many cold fusion experiments.
Potassium carbonate is sometimes used as a buffering agent in the production of mead or wine.
Aqueous potassium carbonate is used in the fertilizer industry for removal of carbon dioxide from the ammonia production synthesis gas coming from the steam reformer