SU461488A3 - Method for producing conditioned granulated fertilizer - Google Patents

Description

(54) METHOD OF OBTAINING A CONDITIONED GRANULAR FERTILIZER

but use the corresponding tris-isoalkylol melamine alkyl esters, for example

N, N, - iso & utillamelamine methyl ether, and 2,4-bys- (1-alkoxyalkylamine) -6-alkyl-b-triazine, for example 2,4-bis- (1-methoxyisobutylamine) -6-methyl-8-triazi.n .

The conditioning agent is applied to the granulate usually in solid powdered form. The amount of conditioning agent is 0.01-0.4% by weight. % relative to the granules that.

The conditioning agent is applied to the hot mirror after the spray has been sprayed onto the cold granulate of an oil of appropriate viscosity or after the sprayed molten paraffin. It is especially desirable to use the present compounds in an oil or paraffin suspension in a ratio of predominantly 1: 1 with the addition of appropriate dispersing agents. As a dispersing agent, not only alkaline, but also alkaline earth salts of higher fatty acids, such as sodium stearate or calcium stearate, are used in this system. These compounds are added in amounts of 0.5 to 5 wt. % of the total amount of conditioning agent / oil or conditioning agent / paraffin dispersion.

Example 1. A granulated ammonium nitrate with a nitrogen content of 26% was sprayed at 60–40 ° C in a powdered drum with a 0.15% suspension of 1 weight. including N, Nbis-isobutylmelamine in 1 weight. h. paraffin with t. pl. 50-55 ° C. The distribution can be checked with the addition of a fluorescent illuminator in ultraviolet light (0.025% relative to the finished conditioning agent).

The calcified ammonium nitrate thus conditioned is compared to the storage in bags for comparison with powdered calcium carbonate 1% powdered ammonium nitrate. After six months in a warehouse with a load of 1000 kg per bag weighing 5 kg, it turned out that ammonium nitrate conditioned by the proposed method remained freely flowing, while calcified ammonium nitrate conditioned with 1% calcium carbonate was in strong lumps. Calcium nitrate used in these experiments has a moisture content of 0.020% and a calcium nitrate content of 0.18%.

The N, S-bms-isobutylol melamine methyl ester used for conditioning is obtained by reacting 0.4 mol of melamine, 1.2 mol of isobutyraldehyde and 6.2 mol of methanol in the presence of α-toluene sulfonic acid at 64 ° C. It melts at 231-234 ° C.

Example 2. Granulated ammonium nitrate with a nitrogen content of 26% is sprayed at a temperature of 25-35 ° C when 0.07% spindle oil is fed into the powder drum and after passing through one third of the drum 0.08% N, Nbys-isobutylmelamine isobutyl ether is sprayed. With the same content of calcium nitrate and the same moisture content of ammonium nitrate as indicated in Example 1, calcimetric nitrate during six months of storage under a load of 1000 kg per bag remains free flowing.

Example 3. To a granulated ammonium nitrate with a nitrogen content of 26%, a mixture (1: 1) of N, N-BWC-isobutymethylmelamine-methyl ether and melting at 70 ° C of natural and synthetic paraffin was added at 105 ° C. in the amount of 0.15 weight. % in relation to ammonium nitrate. Absorption can be tested in the same way as in Example 1 by adding a fluorescent compound. Calcium nitrate containing calcium nitrate, with a moisture content of less than 0.2%, during six-month storage with a load of 1000 kg per bag, remains freely flowing.

Example 4. A suspension consisting of 40% N, N-bms-isobutylol melamine methyl ether, 2% sodium stearate and 58% spun oil was sprayed onto NPK fertilizer (15:15:: 15) with a temperature of 40 ° C. The fertilizer stays free flowing at an investment of 0.9% during the three-month storage with a load of 1000 kg per bag. Conditioning 20% fatty amine solution (35%) in oil and 0.5% diatomaceous earth leads, in contrast, to a partially spexhemus product. .

Example 5. In this laboratory study, the fertilizer is subjected to a load of 1000 kg per bag of 50 kg, and after a specified time the breaking load of the leaf embedded in the fertilizer is determined. The load time is set at the same time so that it is convenient to produce comparable

The type and processing of granules and weight after 65 hours, g

Calcium nitrate after removal from the cooling drum, raw

Calcium nitrate after the cooling drum, sprayed with 0.07 / 0 spindle oil and powdered with powder

0.08% 1.1H- (5 "s-isobutylol melamine methyl ester

0.08 / 0 N, N-5c-isobutyl melamine ethyl ester

0.08 UO M, M-btss-isobutyl melamine propyl ether

0.08 o H, M- (5ac-isobutylol melamine isopropyl ether

0.08% K, K-5ac-isobutylol melamine butyl ether

0.08% K, 1M- (5c-isobutylol melamine isobutyl ether

0.08% M, K- (5ms-isobutylolmelamino-amyl ester

the The greater the breaking weight, the smaller the conditioning effect will be. The results are shown in the table.

EXAMPLE 6 Ammonium nitrate granules with a water content of 0.02% are coated with 0.05% N, N-bmsisobutylmelamine methyl ether in a powder drum. The breaking weight determined as in Example 5 is 250 g, whereas under similar test conditions, unconditioned ammonium nitrate shows a weight of 560 g.

EXAMPLE 7 Ammonium Nitrate Calcareous Nitrate Granulate is Coated with 0.1% S, S-Isobutyl Melamine Methyl Ether in the Conventional Method. The weight determined analogously to Example 5 is less than 250 g.

Subject invention

1. A method of producing a conditioned granulated fertilizer based on ammonium nitrate by coating the granules with conditioning additives based on an S-triazine derivative, is different in that, in order to improve the physical properties of the product, a compound is used as a derivative

S-triazine formula

shsn-in

N N

/ IL

SHSNX N OA

where A is alkyl or isoalkyl, or alkenyl C, -Cb;

B is Ci-Ce alkyl;

X is hydrogen, amino or Ci-4 alkyl, phenyl or the group NHCn-B.

Claims (8)

I OA 2. A method according to claim 1, characterized in that the conditioning substance is applied to the surface of the granulate in an amount of 0.01 to 0.4 weight. % relative to the granules that. 3. A method according to claim 1, characterized in that the melamine derivative is applied to a layer of pre-sprayed oil with a 1: 1 weight ratio of melamine derivative and oil. 4. A method according to claim 3, characterized in that the melamine derivative is applied as a suspension with the addition of a dispersing agent together with an oil. 5. A method according to claim 4, characterized in that alkaline and alkaline earth salts of higher fatty acids are used as a dispersing agent. 6. A method according to claim 5, characterized in that the amount of dispersing agents used is 0.5-5% by weight. % relative to the conditioning mixture. 7. Method according to paragraphs. I and 2, characterized in that the melamine derivative is applied suspended in molten paraffin with the addition of dispersing agent to the still hot Granulate. 8. A method according to claim 7, characterized in that the weight ratio of the melamine derivative and the molten paraffin is 1: 1.