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Additives preventing caking and humectation of nitrogenous fertilizers

A technology of additives and nitrogen fertilizers, applied in the direction of fertilizer forms, fertilizer mixtures, layered/coated fertilizers, etc.

Inactive Publication Date: 2007-04-25
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In said patent application, it is also expressly admitted that the compositions of this patent, although effective against wetting, are much less effective against anti-caking than conventional anti-caking agents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1. Preparation of additive of the present invention

[0049] 1.1. General method

[0050] In a stirred vessel, add the macrocrystalline paraffin in molten state, then add the microcrystalline paraffin and paraffin oil under stirring at a temperature of 80 to 90°C. The mass was kept stirring and the phosphate ester was added in flakes or melt, maintaining the same temperature. Once the material has reached homogeneity, monoethanolamine of at least 99% purity is optionally added. The melt was stirred at the same temperature for 30 minutes. After that, take it out and pack it.

[0051] 1.2. Prepared composition

[0052] Compositions A, B, C, and D shown in Table 1 were prepared according to the general procedure, wherein the amounts of the components shown are in parts by weight of each component added to each composition.

[0053] Table 1. Anti-caking and anti-wetting compositions

[0054] components

[0055] The names of t...

Embodiment 2

[0056] Example 2. Evaluation method

[0057] 2.1 Accelerated caking test

[0058] 70-100 g of granular fertilizers are introduced into cylindrical perforated metal test tubes 60 mm high and 45 mm in diameter which can be opened longitudinally for sample removal, 3 test tubes are used for each fertilizer sample. Subject the specimen to 1.26 kg / cm in an INSTRON load cell (Model 1011) under one of the following two climatic conditions 2 pressure:

[0059] (a) In a HERAEUS HC2057 artificial climate chamber, kept at 60% relative humidity and a temperature of 20° C. for 15 days. Afterwards, the test tubes were placed at ambient temperature and humidity, and the degree of caking was evaluated.

[0060] (b) The test tubes are kept isolated from external humidity for 3 to 15 days, depending on the fertilizer, in a room at a temperature of 40°C. Afterwards, the tubes were evaluated immediately without buffer.

[0061] The results were evaluated by carefully opening the test tube an...

Embodiment 3

[0070] Embodiment 3. comparative test (1)

[0071] According to the "Manual for Determining Physical Properties of Fertilizer", 2 nd Edition, 1993, by David, W.Ritland (ISBN0-88090-101-2) described in the IFDC S-107 "Size Analysis (Sieve Method)" section, by using a dosage of 1200ppm relative to the weight of the fertilizer, Granular ammonium nitrate containing 33.5% nitrogen maintained at a particle size of 2.36 to 4.00 mm (mesh size) in water ( 4% by weight) has a pH of 6.2.

[0072] The following additives were tested:

[0073] - SK FERT FW5AG, an anti-caking additive sold by Kao Corporation, S.A., which is a composition consisting of an oily base containing fatty amines and other fatty derivatives.

[0074] - LILAMIN AC-41, an anti-caking additive sold by AKZO-NOBEL, which is a composition consisting of an oily base containing fatty amines and other fatty derivatives.

[0075] - Composition A of Example 1.

[0076] - Composition B of Example 1.

[0077] Also tested w...

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Abstract

The present invention relates to new additives for preventing caking and humectation of nitrogenous fertilizers having a material composition which is free of fatty amines or their salts and characterized in that it comprises: (i) between 50 and 90 parts by weight of a macrocrystalline paraffin having a viscosity at 100 DEG C between 2 and 5 cSt (ASTM D-455), with a paraffin oil content under 20% by weight (ASTM D-721); (ii) between 0 and 20 parts by weight of a paraffinic oil having a viscosity at 100 DEG C between 3 and 40 cSt (ASTM D-455); (iii) between 0 and 10 parts by weight of a microcrystalline paraffin having a viscosity at 100 DEG C between 10 and 25 cSt (ASTM D-455) with a paraffin oil content not greater than 15% by weight (ASTM D-721); (iv) between 10 and 50 parts by weight of phosphoric acid monoesters and / or diesters of C2-C22 alkyl or C2-C12 arylalkyl, optionally alkoxylated; so that the total paraffin oil content of the composition is greater than 1% by weight.

Description

field of invention [0001] The present invention relates to novel additives for preventing caking and wetting of nitrogen-containing fertilizers, based on a composition of materials containing hydrophobic substances and phosphate esters. Background technique [0002] Spanish patent application ES-A-2121694 filed by the applicant describes anti-caking compositions for granular fertilizers based on the combined use of mineral oils, fatty amines and alkyl phosphates. The specification of said Spanish patent application contains an extensive description of the prior art concerning anti-caking compositions for fertilizers, with specific references to relevant documents. [0003] Table II of Example 1 of US Patent 5364440 describes a composition containing 50% mineral paraffin oil, 40% paraffin and 10% phosphoric acid C 16 -C 18 Magnesium salt of alkyl ester. The composition is described only as an anti-caking agent for fertilizers without any reference to preventing wetting. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00B01J2/30C05G3/30
CPCC05G3/0035B01J2/30C05G3/0088C05G5/38C05G3/30
Inventor J-A·利亚扎马缇耐兹A·普拉特门托
Owner KAO CORP
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