CS234221B1 - Suspended fertilizer with gradually acting nitrogen - Google Patents

Abstract

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

Description

The present invention relates to a suspension fertilizer containing a slow absorption nitrogen.

In plant nutrition, nitrogen has a key position both as an essential building block of each protein and as an irreplaceable macro-nutrient in the formation of chlorophyll. Accordingly, in what form the nitrogen is present in the fertilizer, the nitrogen fertilizers are classified as ammoniacal, nitrate and amide.

Nitrogen-containing fertilizers and nitrogen-containing fertilizers have a special position among nitrogen fertilizers. Some of its total amount in slow resorbable form, with the source of slow resorbable nitrogen being, for example, nitrogen lime, lime are urea-aldehyde condensates such as urea-formaldehyde condensates, crotonylidene urea, butene- (2H) -aldehyde condensate, isobutylidene diurea, Saliva guanylurea, glycoluryl, triuret, oxamide, hexamethylenetetramine and others, providing sufficient nitrogen supply throughout the growing season, without the need for additional fertilization, reducing nitrogen losses due to leaching and increasing crop yields.

Of the aforementioned types of slow-acting fertilizers, urea-formaldehyde condensates are the most widespread, which are either solely or mixed with other fertilizers in powdered or granular form. The use of these fertilizers does not result in an even distribution both in the preparation of the fertilizer mixture itself and in its application, which is very difficult when using slow-acting fertilizers themselves, characterized by high particle fineness.

It has now been found that the above-mentioned shortcomings can be remedied by using a slurry nitrogen fertilizer with slow nitrogen, which consists in 100 parts by weight of 30 to 60 parts by weight of hexamethylenetetramine, 15 to 45 parts by weight of urea, up to 50 parts by weight.

234,221 parts by weight of ammonium nitrate, 8 to 35 parts by weight of water, S to 30 parts by weight of inorganic potassium salt, and optionally a stabilizing additive.

It has also been found that potassium chloride and / or potassium sulfate and / or potassium carbonate 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.

An advantage of the suspension fertilizer according to the invention is the fact that its application achieves a much higher uniformity of nitrogen distribution on the ground than with the application of solid fertilizers. A further advantage of the suspension nitrogen fertilizer is that it contains a larger amount of total nitrogen as compared to similar types of clear liquid fertilizers, in particular the proportion of slowly resorbable nitrogen increases. A great advantage of the suspension nitrogen fertilizer according to the invention is that, in addition to ammoniacal and nitrate and / or amide nitrogen, it also contains nitrogen in the form of a tertiary amine, which is used as a slow absorption nitrogen. Furthermore, the suspension nitrogen fertilizer containing hexamethylenetetramine practically does not exhibit corrosive aggressiveness to commonly used carbonaceous construction materials.

The application of this type of suspension fertilizer immediately after its preparation does not require stabilization. If, however, application is not possible immediately after the suspension fertilizer has been prepared, it is advantageous to stabilize the suspension fertilizer according to the invention in the case of prolonged storage, with the use of a stabilized additive based on a natrified bentonite dispersion.

A further advantage of the fertilizer according to the invention is that it makes it possible, in the presence of a suitable stabilizing agent, to produce not only high-concentration nitrogen phosphorous but also multi-component NPK liquid fertilizers containing a certain proportion of nitrogen in slowly resorbable form.

The following examples illustrate but do not limit the invention.

EXAMPLE

Suspension fertilizer containing 35.0 parts by weight of hexamethylenetetramine, 27.4 parts by weight of ammonium nitrate,

234 221

21.2 parts by weight of urea and 16.4 parts by weight of water showed the following parameters:

- total nitrogen content

- the nitrogen content of the mold

- the nitrogen content of the mold

- nitrogen content in the form

- specific gravity č ^ q οθ

- apparent viscosity

33.5 % 9.7 % 9.8 % 14.0 steed / 0 1296 kgm 53.26 mPa

ammonium nitrate amide 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% by weight bentonite natriated dispersion of localities »», “Jelšový potok has determined the following qualitative parameters:

- total nitrogen content 30,7%

- nitrogen content in the form of ammonium nitrate 5,8%

- nitrogen content in amidic form 5,8%

- nitrogen content in the form of tertiary amine 19,1% -3

- specific gravity dg ^ οθ 1258 kg.m apparent viscosity 160,4 mPa.s

- stability after 7 days of storage in the storage vessel becomes clear

22.4% vol. From bottom

Claims (1)

Slurry nitrogen fertilizer suspension based on 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.