Abstract: A method of granulating of water soluble fertilizers which contain kieserite with a mass content of between 25 and 100% and which have primary particles within a very wide grain spectrum with a fraction of at least 20% under 0.09 mm, includes the steps of providing a granulating material including kieserite, applying to the granulated material moisturizing liquid, prior to or during applying the moisturing liquid adding to the granulating material soluble and/or somewhat collodial soluble substances from the class of mono-, di- and polysaccharide and/or their simple hydrophilic derivatives in solid form or in a solution in which they provide a main part, in a dose of between 0.1 and 5% dry mass relative to a dry weight of the fresh granulated material, forming the granules, and drying the granules after their formation to a residual moisture of 1 to 6% of kieserite mass contained in them.

Abstract: Crude potash salt is conditioned for separation into its components by means of an electrostatic field by grinding the salt to disintegration and contacting the ground salt with a conditioning agent, such as salicylic acid, which has been converted to the gaseous state, such that the conditioning agent draws up onto the surfaces of the salt crystals by absorption. The quantity of the conditioning agent employed is adjusted by varying the evaporation temperature and/or by varying the volume of heated air and/or inert gas, serving as a carrier material.

Abstract: A process for producing potassium magnesium phosphate from phosphoric acid, potassium chloride and magnesium oxide, carbonated or like alkaline magnesium compound, which comprises adding the magnesium compound to an aqueous solution of the phosphoric acid or the acidic soluble phosphate salt and an amount of potassium chloride in excess of that theoretically required, in an amount and at a rate such that the pH is maintained below 9 and a high ratio of potassium chloride to magnesium chloride is maintained in the reaction mixture, whereby the formation of tribasic magnesium phosphate is suppressed.