SU1439093A1 - Method of producing liquid nitrogen-containing fertilizers with microelements - Google Patents

Abstract

The invention relates to methods for producing liquid nitrogen-containing fertilizers based on urea and ammonium nitrate (CAM) containing microelements. The method includes the introduction of a filtrate into CAS, papa t-ieHHoro by treating dust with cleaning filters (waste production of non-ferrous metals), with 10-25% aqueous ammonia solution at their mass ratio of 1: 10-20. The composition of the resulting fertilizer, carbamide 30.0- 36.4; nitrate a mono 40,0-43,3; the rest of the filtrate is water-ammonia, containing in the composition of ammoniate microelements, wt.%: zinc 0.04-0.13; copper 0.02-0.05; Nickel (0.04-0.15); 10-manganese (0.02-0.08). The total nitrogen content in the fertilizer is 26–36%. The crystallization temperature is minus 2 - minus 19 ° C5; stability is 3-4 months. 1 hp f-ly., (L

Description

The invention relates to the production of fertilizers, in particular, to the production of liquid nitrogen fertilizers based on urea and ammonium nitrate with microelements used for soil and foliar feeding of crop cultures.

The aim of the invention is to improve the quality of fertilizers for foliar feeding by improving their physicochemical and operational properties.

The method of obtaining liquid nitrogen-containing fertilizer with trace elements, including the introduction into the solution or suspension of liquid fertilizer f, for example, based on urea and ammonium nitrate, a trace element microfilter obtained by treating dust cleaning filters (POF) - production waste when processing non-ferrous metals 25 % water aq at a mass ratio of POF: aqueous ammonia 1: (20-10). When introducing the filtrate into the fertilizer based on urea and ammonium nitrate (CAM), the ratio of urea and ammonia villages is used It equals 3: 4., with a total nitrogen content of at least 26-36%. the filtrate can be added to each of the components in accordance with the subsequent addition of another co-component. The ratio of POF: ammonia, equal to 1: (10–20), ensures the greatest mutual solubility of the components of the liquid fertilizer base S and determines the highest content of total nitrogen for such systems without disturbing the stability of the system up to the crystallization temperature

Dust cleaning filters - production waste in the processing of non-ferrous metals. POP - highly dispersed powder (40-110) microns with a specific surface area of 70-75, X-ray spectral analysis showed that the composition of PEF includes elements, wt,%: 1SHNK 60-64; copper 6-9; iron 3-4,

potassium 255-3.0; 3-5 calcium, titanium, nickel, manganese 1-2 and others.

POF (5-10) mac. mixed with (90-95 mAh., 25% aqueous ammonia. Decant the solution from the precipitate, filter. The elements of g / l were detected by atomic absorption analysis of the filtrate: 1С1СНК 3; 5-552; copper 0.9- 2.1; nickel (2.5x10 -6.0x10), manganese

2, Oh 10.,. The filtrate is added to the main fertilizer.

Since the process of dissolving the components (ammonium nitrate, carbamide) proceeds with decreasing temperature (endothermic process), the mixture is heated to a temperature of 35-50 ° C to more quickly dissolve. Further temperature increase to 50-90 ° C is possible, but not practical from the point of view of economy energy consumption Heating above 90 ° C is unacceptable due to decomposition of the starting products.

Based on the efficiency and safety of work, the concentration of ammonia in water is 10-25%. A strongly diluted solution due to poor wettability of the liquid in water does not provide a noticeable transition of microelements into a soluble form, for example, in ammoniates like Me (NH)} ri (H, 0) D (OH), where Me is Zn, Cu, Ni, etc. . The use of 25% aqueous ammonia — a product of industrial production — is most expedient for economic reasons. The use of aqueous ammonia of higher concentration is possible, but not technological, as it requires appropriate precautions due to the volatility of ammonia. Treatment with aqueous ammonia can be carried out in several stages, providing a more complete extraction of the required trace elements.

The amount of POF for the preparation of suspensions in aqueous ammonia is 5–10% 5 ratio 1: (10–20). The preparation of suspensions of a lower concentration is impractical because of the preparation of solutions with a low concentration of trace elements, as can be judged by the weak blue color of copper amminates in solution. The use of pypy in an amount of more than 10% is inefficient, since the content of trace elements in the filtrate does not increase significantly. The amount of insoluble precipitate increases greatly, which makes filtration difficult.

Example 1. 5g of the filter cleaning filters are treated with 93 ml of aqueous amm5-1ac (25%) with mechanical agitation followed by decantation and filtration. The atomic absorption analysis showed that the concentration (titer) of microelements in the water-ammonia filtrate, the input of х 1x in the composition of complexes with am.miac, is.

31439093

g / MP Zn 3.5-10; Cu 9.1 x 10; warmed to dissolve.

Ni 2.5x10. The resulting liquid composition is a transparentK mixture of carbamide 30 g and ammonia, dark blue, stable

50 g of this saltpeter is added with 30 ml of this, with long-term storage, it has a dark ammonia-based filtrate. A mixture of crystal temperature.

heated to 35-50 С to completeAbsolute content of microelements

dissolving. The resulting liquid composition in the composition is: g: Zn 0, OA; zitsi transparent, painted in dark-blue 0.02; Ni 0.04 x 10; MP 0.02x10.

blue color, stable for long periods. The south of the jetty is purified by storage and has a temperature of incremental filters that are treated with 25% of crystals minus; 19 C. In compound aqueous ammonia 45 ml, during the mechani cation, the absolute content of microelectric mixing. After decanting agents that make up the complex, the sediment is re-treated with ammonia, g: Zn 0.11; 15 howl a portion of 25% ammonia water C 0.03; Ni 0.08 x 10. Mo fertilizer (45 ml) with mechanical stirring is used to bring in the bath, followed by filtration

soil, and foliar application through the mixture. In 1 sh water ammonia filtering the leaves of agricultural ystrata contains trace elements, g:

vein cultures. 20 Zn 5,2x10-5; Si 2.1x10-; Ni 0,006 x

PRI mme R 2. 10 g cleanse clean - x10 e, Mn 0.003x10.

Body filters are treated with a 25% -K mixture of 32.7 g of urea and 42.2 g.

in a mixture of ammonia nitrate, ammonium nitrate, 190 mp added 25.1 mp

mixing with the subsequent ammonium-water filtrate, the mixture

decantation and filtration. In 1 ml of 25 heated until complete dissolution

water-ammoniacal filtrate content The resulting liquid composition of the transparency-microelements included in the compound is stable for long-term storage of complexes with ammonia, is, g: nii, has a deposition temperature of crystal Zn 4.1 x 10, Cu 1.65 x 10; Ni 0,004 x tolls. Absolute content

, No. i 0.002x10 .30 microelements in the combination contains a mixture of 36.4 g of urea and 43.3 gels, g: Zn 0.13; C 0.05; Ni 0.15x

ammonium nitrate added 20.3 mp10; Mp 0.08 x 10.

this filtrate. The mixture is heated to

complete dissolution. The resulting liquid-composition of the fertilizer obtained by

The composition is transparent, dark blue; 35, to the proposed method, includes, for its color, it is stable when the carbamide is long 30.0-36.4; ammonium nitrate

throat (3-4 months), has a temperature of-40.0-43.3; the rest of the filtrate is a precipitate of -3 ° C. Abso-ammonia containing trace element

lute content of microelements, ob- (zinc 0.04–0.13, copper 0.02–0.05, which breaks up complexes with ammonia, in 40 nickel (0.04–0, 15), the manganese composition was em, g: (0.02-0.08)) in the composition of ammonia Zn 0.08; C 0.03; .Ni 0.08x10; Mptov. Capacity n of the specified composition O-liquid transparent solutions, stable urea mixture of 30 g and ammonia during long-term storage (3-4 months)

40 g of nitrate are added with 30 ml45 total nitrogen content (26-36)% and

of this ammonia-water filtrate with a crystallization temperature in inter-microelements. The mixture is heated. Shaft minus 2 - minus 19 C. Fertilizer,

The resulting transparent liquid composition obtained in the manner described above, preserved, dark blue, sustained all the advantages of CAM as stable during long-term storage, has dark, balanced systems with a deposition rate of -19 ° C crystals. . Wherein

The absolute content of microelements, they are distinguished by valuable agrochemical ammonia compounds, in a given point of view, the properties of the conditional composition are, g: Zn, the presence of a number of important microns, 12, Cu 0.05; Ni 0.12 x 10, Mp 0.06 x 55 roelements in a soluble, available xU.dl plant form. All this allows To a mixture of carbamide 32.7 and ammonia-, to expand the scope of application of convenient nitrate 42.2 g add 10 ml - for foliar feeding of this filtrate and 15 nl of water. Spray on the leaves.

The advantage of the proposed method for producing liquid nitrogen-containing fertilizers with microelements is the expansion of the set of microelements introduced into the fertilizer in a form available to plants, as well as the disposal of production waste.

Claims (2)

1. A method of producing liquid nitrogen-containing fertilizers with trace elements, including the introduction of liquid rhenium for foliar feeding by improving its physicochemical and operational properties, as a microelement-containing additive, use a filtrate obtained by treating dust from cleaning filters - waste production of non-ferrous metal processing with a 10-25% aqueous solution of ammonia at their mass ratio of 1:10 -20. 2. The method according to p. 1, u and with the fact that I distinguish the quality of micronutrient-containing fertilizer additives, characterized in that, in order to improve the quality of the Nitrogen-containing fertilizers use a mixture of carbamide and ammonium nitrate.