CS234221B1 - Suspension fertilizer with slow nitrogen - Google Patents

Abstract

The invention relates to a suspension or fertilizer with slow nitrogen absorption, containing hexamethylenetetramine, urea, water, possibly ammonium nitrate, an inorganic potassium salt and a stabilizing additive.

Description

1,234,221

BACKGROUND OF THE INVENTION The present invention relates to a suspension fertilizer comprising slow nitrogen transfer.

In plant nutrition, nitrogen has a pivotal position as a constituent element of each protein as well as an irreplaceable macronutrient in chlorophyll formation. According to the form, the nitrogen is present in the fertilizer, the nitrogenous fertilizers are divided into na-ammonia, nitrate and amide.

Nitrogen-containing fertilizers or nitrogen-containing fertilizers have a special position between nitrogen fertilizers. Part of its total amount in free resorbable form, where the source of slowly resorbable nitrogen is, for example, nitrogen lime, furthermore urea-aldehyde condensates such as urea condensates with formaldehyde, crotonylidene urea, butene- (2). -aldehyde condensate, isobutylidone-urea, saline guanylurea, glycoluryl, triuret, oxamide, hexamethylenetetramine, and others, providing sufficient nitrogen under the entire vegetation period, without additional fertilization, reducing leaching nitrogen losses and increasing crop yields. Of these types of slow-spreading fertilizers, urea-formaldehyde condensates are most widespread, which either recover separately or mixed with other fertilizers, in powder or granular form. When using these fertilizers, the uneven distribution of both the seed mixture itself and the application thereof, which is very difficult with the use of very low fertilizer grades characterized by high particle fineness, is difficult.

It has now been found that the above drawbacks can be avoided by the use of a nitrogen-slow suspension nitrogen fertilizer comprising from 30 to 60 parts by weight of hexamethylene tetramine, 15 to 45 parts by weight in 100 parts by weight. urea, ζ up to 50 wt.% 234,234,218 parts of ammonium nitrate, 8 to 35 parts by weight of water, S až up to 30 parts by weight of inorganic potassium salt and optionally stabilizing the additive ·

It has also been found that potassium chloride and / or potassium sulfate and / or potassium bicarbonate and / or potassium nitrate and / or potassium dihydrogen phosphate and / or potassium hydrogen phosphate and / or condensed potassium phosphates are preferred as the inorganic potassium salt. The advantage of the suspension fertilizer according to the invention is the fact that when applied! a much higher uniformity of nitrogen distribution per pod is achieved than in the application of solid fertilizers. A further advantage of the suspension nitrogen fertilizer is that, compared to the other types of clear liquid fertilizers, it contains a larger amount of nitrogen-containing nitrogen, with a particularly high proportion of nitrogen-resorbable nitrogen. A great advantage of the nitrogen suspension fertilizer according to the invention is that it contains nitrogen in the form of a tertiary amine in addition to ammoniacal and nitrate and / or amide nitrogen, which is used as a slow-acting amide. In addition, the suspension nitrogenous fertilizer containing hexa-methylenetetramine practically does not exhibit corrosion aggressiveness in any carbonaceous material used.

It is not necessary to stabilize this type of suspension fertilizer immediately after its preparation. However, if the application immediately after the suspension fertilizer preparation is possible, it is preferable and in the case of long-term storage, the necessary suspension fertilizer according to the invention to be stabilized, wherein a stabilizing agent based on a bentonite dispersion is preferred for the said seed. Another advantage of the fertilizer according to the invention is that it allows not only high-concentration nitrogen-phosphorous but also multi-component NPK liquid fertilizers to contain some nitrogen in a slow resorbable form in the presence of a suitable stabilizing agent. The following examples illustrate but are not limiting of the invention. Přikladl

The suspension fertilizer contains 35.0 parts by weight of hexamethylenetetramine, 27.4 parts by weight of ammonium nitrate, 3,234,221 21.2 parts by weight of urea and 16.4 parts by weight of the following parameters: - total nitrogen content - nitrogen content in the form - content nitrogen in form - nitrogen content in form - specific weight? q ^ q οθ - apparent viscosity 33,5% 9,7% 9,8% 14,0 o / 0 1296 kg.m 53,26 mPa ammonium nitrate ammonium tertiary amine Example For suspension fertilizer containing 47,6 parts by weight of hexamethylenetetramine, 16,5 parts by weight of ammonium nitrate, 12.7 parts by weight of urea, 9.8 parts by weight of water and 13.4 parts by weight of a stabilizing additive in the form of a 15% natrilated dispersion of bentonite from the site », qualitative parameters: - total nitrogen content 30.7% - nitrogen content in the form of ammonium nitrate 5.8% - nitrogen content in the form of amide 5.8% - nitrogen content in the form of tertiary amine 19.1% - 3 - specific gravity? 1258 kg.m - apparent viscosity 160.4 mPa.s - stability after 7 days of storage in the storage vessel resulted in a clarification of 22.4% by volume from the bottom of the vessel.

Claims (1)

BEFORE METHOD OF THE INVENTION 234 221 Sustained nitrogen-containing suspension fertilizer on a base of hexamethylenetetramine, urea and / or ammonium nitrate, characterized in that in 100 parts by weight it contains 30 to 60 parts by weight of hexamethylenetetramine 15 to 45 parts by weight of urea and / or 5 to 50 parts by weight of ammonium nitrate and or 5 to 30 parts by weight of inorganic potassium salt 8 to 35 parts by weight of water. and optionally a stabilizing additive.