| abstract |
In the preparation of fertilizers containing calcium carbonate and ammonium nitrate, calcium carbonate, which has been obtained in the reaction of calcium nitrate with ammonia and carbon dioxide or ammonium carbonate in aqueous solutions, is introduced into ammonium nitrate melts. Calcium carbonate is used which contains ammonium nitrate and water, with the proviso that the sum of the ammonium nitrate and water contents does not exceed 25% by weight, the water content 4 to 11% by weight and the ammonium nitrate content at least 1% by weight. is. |