CS229299B1 - Process for the production of non-caking fertilizers and salts - Google Patents

Abstract

According to the invention, salts of fatty acids with alkyl polypropylene polyamines are applied to the surface of these materials. These are applied in a concentration of 0.005 to 0.2 % by weight of the active substance either in the form of a melt, dispersion or solution. For this purpose, it is advantageous to use, for example, octadecyl propene diamine dispearate, the application of which significantly reduces the caking of industrial fertilizers.

Description

The invention relates to a process for producing non-caking industrial fertilizers and salts.

The agglomeration of industrial fertilizers and salts due to the adsorption of water on these materials complicates the handling and use of these materials considerably. This often leads to considerable economic losses, especially in agriculture. For these reasons, the non-caking treatment of fertilizers and salts is the subject of intensive research.

An overview of methods of non-caking treatment and the means used for this treatment is known, for example, from MS. No. 189,821, which discloses the use of stearylamine which is applied to the surface of treated materials in a concentration of 0.01 to 0.1 wt. Non-caking treatments where fatty amines are used in combination with various carriers such as kaolin or montmorillonite (U.S. Pat. Nos. 3,346,429 and 3,234,006) are often described in the literature. Said methods of non-caking treatment of fertilizers and salts are often used industrially. Their disadvantage is the cost of these treatments because, although these are relatively low concentrations of the active ingredients, their consumption is considerable with respect to the mass production of industrial fertilizers.

The above-mentioned drawbacks are eliminated by the process for producing non-caking industrial fertilizers and salts according to the invention, which comprises applying a melt, dispersion or solution of salts of natural or synthetic fatty acids containing 10 to 22 carbon atoms with aliphatic alkylpolypropylene polyamines of the formula

R NH (CH 2 CH 2 CH 2) _n NH 2 (I) optionally with technical mixtures of these polyamines, wherein R is a fatty alkyl derived from natural or synthetic fatty acids or mixtures thereof containing from 10 to 22 carbon atoms and n = 1-3; they are applied to the surface of the materials to be treated in an amount of 0.005 to 0.1% by weight, preferably 0.02 to 0.05%.

An advantage of said process for the production of non-caking granular fertilizers and salts is the fact that the fertilizers produced have a high caking resistance when using lower concentrations of the active substance than in the known production methods.

The process for producing non-caking industrial fertilizers and salts is further described in the following examples.

Example 1

500 g of granulated ammonium nitrate with limestone (nitrogen content 27.5%) was surface-treated by spraying a solution of 30% octadecyl propylenediamine distearate and 70% mineral oil in the amount of 0.5 grams (0.15 g distearate) which was heated before application at 60 ° C. The anti-caking effect was assessed by the degree of caking that decreased to 35% of the starting mass compared to the untreated fertilizer. Same-. This effect was achieved by applying octadecylamine in an amount of 0.25 g per 500 g of granulated ammonium nitrate with limestone.

Example 2

500 g of granular compound compound fertilizer was surface treated by spraying a solution of octadecyl propylenediamine distearate of the same composition and in the same amount as in Example 1. The sintering in this eventually decreased to 13% of the starting value.

Example 3

500 g of crystalline sodium chloride for technical purposes were surface treated by spraying a melt of octadecyltripropylenetetramine tetrastearate heated to 80 ° C in a rotary drum in an amount of 0.05% based; to the weight of NaCl. The result was a product which had a sintering rate of 50% compared to untreated sodium chloride.

Claims (1)

SUBJECT Process for the production of non-caking industrial fertilizers and salts, characterized in that a melt, dispersion or solution of salts of natural or synthetic fatty acids containing 10 to 22 carbon atoms with aliphatic alkyl polypropylenepolyamines of the general formula or technical mixtures of these polyamines is applied to the surface of granules or crystals. R is a fatty alkyl derived from natural or synthetic fatty acids or mixtures thereof containing from 10 to 22 carbon atoms and n = 1 to 3, these salts being applied to the surface of the treated materials in an amount of 0.005 to 0.2% by weight, preferably 0.02 to 0.05 wt.