CS223076B1 - Liquid nitrogen fertilizers - Google Patents

Abstract

Liquid nitrogen fertilizer of solution type containing in 100 parts by weight of liquid fertilizer 5 to 40 parts by weight of hexamethylenetetramine, 5 to 60 parts by weight of ammonium nitrate and/or 5 to 50 parts by weight of urea and 35 to 90 parts by volume of water

Description

223076

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid nitrogenous fertilizer solution type containing nitrogen.

In plant nutrition, there is a key position in the heart, which is the basic structural element of any protein as well as irreplaceable in the production of chlorophyll. According to the form in which nitrogen is present in the fertilizer, nitrogenous fertilizers are divided into ammonium, nitrate and amide.

The most commonly used cheapest and most concentrated nitrogen fertilizer is liquid ammonia (82.2% N), which is also the starting material for the production of other types of nitrogen containing fertilizers such as lizards, ammonia, urea or multi-component fertilizers.

Liquid ammonia is a pressurized nitrogen fertilizer and, due to its high vapor pressure, its distribution and application is relatively difficult.

For direct fertilization, urea is used as a source of nitrogen or granular urea (46.6% N 1 alone, or as a component of granular fertilizers or nitrogen solutions such as nitrate ammonium ammonium and urea (ADAM); ammonium nitrate solution and urea (UAN, DAM) and the like. Aqueous solutions of nitric ammonium and urea produced under the trade name DAM-390 (UAN in the USA) indicate a relatively high content of nitrogen (350-430 kg N in m 3), low vapor density and low low salinity (0-18 ° C). ° C).

Ammonium nitrate (35% N), which is an essential component of granular diadammonium; ammonium-calcium and ammonium-magnesium (28-33% N), or nitrous solutions of the above-mentioned multi-component fertilizers, is the sought-after fertilizer, especially since it contains both basic nitrogen-ammonium and nitrate forms.

Fertilizers containing all or part of the nitrogen in the gradual resorbable form have a particular position among the nitrogen fertilizers, whereby the source of slowly resorbable nitrogen is, for example, nitrogenous lime, urea-aldehyde condensates such as urea-formaldehyde condensates; crotonylidene urea [butene- (2) -aldehyde condensate]; isobutylidene dime, further guanylurea; triuret; oxamide; hexamethylene tetramine and others providing sufficient nitrogen supply for the entire vegetation period.

It has now been found that non-pressurized, clear liquid nitrogenous fertilizers of solution type contain slowly absorbable nitrogen; prepared on the basis of an aqueous solution of hexamethylenetetramine, ammonium nitrate and / or urea.

The invention is based on the fact that 100 parts by weight of liquid fertilizer contain 5 to 40 parts by weight of hexamethylenetetramine, 5 to 60 parts by weight of ammonium nitrate and / or 5 to 50 parts by weight of urea and 35 to 50 parts by volume of water. An advantage of the liquid nitrogen fertilizer according to the invention is that the solutions are characterized by a high vapor pressure and a relatively high low temperature stability, with a weakly alkaline reaction. Another advantage of the liquid fertilizer according to the invention is that by adding hexamethylenetetramine, it is possible in the case of ammonium nitrate and urea solutions to increase the nitrogen level in the solution.

A great advantage of the liquid nitrogen fertilizer according to the invention is that it also contains nitrogen in the form of a tertiary amine, which acts as a slow acting nitrogen, in addition to nitrogen and nitrate and / or ammonium. In addition, the liquid nitrogen fertilizer containing hexamethylene tetramine practically does not exhibit corrosion aggressiveness to commonly used carbon-containing structural steels.

These examples illustrate, but do not limit, the subject matter of the invention. EXAMPLE 1 In chemical laboratory conditions, the following chemical and physical-chemical parameters are determined in clear liquid nitrogenous fertilizers containing 36.0 parts by weight of ammonium nitrate, 24.0 parts by weight of hexamethylenetetramine and 40.0 parts by weight of water. : - total nitrogen content - nitrogen in the form of ammonium nitrate - nitrogen in the form of tertiary amine - specific gravity d20st.c - pH2ost.c - temperature

22.2% N

12.61% N

9.59% N 1214.8 kgm ~ 37 9 - 17.4 ° C. Example 2

A solution containing 10.0 weight percent hexamethylenetetramine, 40.0 weight percent urea, and 50.0 weight percent water had the following chemical and physical-chemical properties: - total nitrogen content 22.7 θ / ο N - of which nitrogen in the form of 4.0% N tertiary amine - nitrogen in the form of ami - 18.7% N - specific gravity d20st.c - pH2ost.c - temperature of drawing 1125.8 kgm'9.0 -14.3 CC. Example 3

Liquid nitrogenous solution containing 25,0

Claims (1)

SUBJECT Liquid nitrogen fertilizer of solution type containing slow-acting nitrogen, characterized in that in 100 parts by weight of liquid fertilizer contains We claim: 5 to 40 parts by weight of hexamethylenetetramine, 5 to 60 parts by weight of ammonium nitrate; and / or 5 to 50 parts by weight of urea and 35 to 90 parts by volume of water.