JPS6144783A - Condensate for liquid fertilizer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a raw material for liquid fertilizer.Compared to conventional liquid fertilizers, the raw material for liquid fertilizer has a high composition because it does not contain water as a solvent, and the transportation costs that arise from this. Although it has advantages such as lower packaging costs, it is often difficult to handle because it tends to clump.

Conventionally known methods for preventing caking of fertilizers include adding fine powders of silica, algae, talc, bentonite, acid clay, magnesium subacid, magnesium hydroxide, etc.;
Method of adding ferric phosphate salt (Special Publication No. 5l-4087
7) Or, there are various methods such as adding fatty acid amide and aliphatic amine (Japanese Patent Publication No. 58-8668), but applying these anti-caking agents to liquid fertilizer raw materials is not recommended for use of the product. Depending on the purpose, this may be undesirable; for example,
Liquid fertilizer ingredients are often dissolved in water and then sprayed onto the leaves using a sprayer. If such a product is used, it may not be possible to use it because it causes adverse effects such as clogging of the spray nozzle of the atomizer or the like and adhesion of Nuke-P. Therefore, there has been a demand for highly water-soluble anti-caking agents for liquid fertilizer ingredients.

As a result of various studies on preventing caking of liquid fertilizer ingredients, the present inventors found that by adding a small amount of potassium pyrophosphate to liquid fertilizer ingredients, an excellent caking prevention effect was obtained. It was found that there were no adverse effects.

That is, the present invention is a liquid fertilizer raw material characterized by containing 1 to 10% by weight of potassium pyrophosphate.

In the present invention, the active ingredients for liquid fertilizers include nitrogenous fertilizers such as ammonium nitrate, urea, ammonium sulfate, ammonium chloride, phosphoric acid fertilizers such as ammonium phosphorus, ammonium phosphorus, etc., and potassium fertilizers such as potassium chloride and potassium sulfate. , as well as compounded fertilizers containing many types of fertilizer components by combining these fertilizer substances, and granular compositions containing elements necessary for plant growth such as magnesium, boron, and manganese. .

Potassium pyrophosphate used as an anti-caking agent in the present invention does not need to be pure, and may be commercially available for industrial use.

The anti-caking agent according to the present invention can provide a satisfactory anti-caking effect when added in a small amount; however, if the amount added is too small, the anti-caking effect may be insufficient; If there is too much, a significant improvement in the anti-caking effect cannot be expected and it is economically disadvantageous.
It is used in the range of ~10% by weight, preferably 3~8% by weight.◇ The method of addition is not particularly limited and may be carried out using conventional means. Most commonly, while rolling the liquid fertilizer substance using a device such as a rotating cylinder or rotating plate,
A method of adding and mixing potassium pyrophosphate is adopted.◇ When adding potassium pyrophosphate to liquid fertilizer ingredients for treatment, it is extremely superior to conventionally known anti-caking agents. It can be expected to have an anti-caking effect.

Although it is not clear what mechanism causes the anti-caking effect of the anti-caking agent of the present invention, the caking properties of fertilizers are generally caused by the absorption of water from the saturated solution that forms between adjacent particles to the atmosphere. It is thought that this is because the crystals that precipitate when the state changes become bridges between each particle.
According to the method of the present invention, the powder of potassium pyrophosphate not only prevents contact between fertilizer particles, but also absorbs water on the surface of the particles and produces a hydrate of potassium pyrophosphate, which makes the fertilizer more attractive. It is necessary to keep it in a dry state, and the hydrate of potassium pyrophosphate that is produced is a stable non-caking substance, so their effects combine to provide an extremely excellent anti-caking effect. It is assumed that the

Therefore, according to the method of the present invention, it is possible to simultaneously deal with particle contact, which causes fertilizer caking, and hygroscopicity.

The present invention will be described in more detail with reference to Examples below, but the present invention is not limited only to these Examples.

In addition, all % and parts in the examples indicate weight % and parts by weight unless otherwise specified.

Example 1 91 parts of crystalline nitrogen (nitrogen: 21.10%), ammonium phosphorus (ammonium nitrogen: 12.08%, water-soluble phosphoric acid: 60.89)
%) 123 French crystalline potassium chloride (water-soluble power! J: 62
．． 0%:) Powdered potassium pyrophosphate (water-soluble phosphoric acid: 41.74%,
Water-soluble Carini (55.22% industrial commercial product) was added at room temperature and tumbled for 5 minutes to obtain an ammonium nitrate liquid fertilizer base material.The degree of migration and caking of the mixture was measured. The results are shown in Table 1.

The degree of solidification was measured by the following method.

In other words, polyvinyl chloride/l with an inner diameter of 32 and a height of 30
Fill the sample into a cylinder made of
Height 10Il! A polyvinyl chloride/L' cylinder of Il was placed on it, a load of 1 kf was applied thereto, and after wrapping it in a polyethylene bag, it was left in a constant temperature and humidity chamber at a temperature of 30° C. and a humidity of 80% for 7 days. After standing, take out the sample inside the cylinder, measure its pressure rupture strength, and estimate the degree of solidification.

Comparative Examples 1 to 4 The same ammonium nitrate liquid hiban bulk as in Example 1 was carried out in the case where potassium pyrophosphate was not added and in the case where well-known anti-caking agents: diatomaceous earth, talc, and acid clay were added. Example 1
The same operation as above was performed to measure the degree of solidification. These results are shown in Table 1.

Table 1 (Note) Pressure burst strength 2k and below are hardly consolidated.

The moisture content of the original sample of ammonium nitrate liquid fertilizer Kawahara is 0.
．． It is 28%.

As shown in Table 1, it has been found that when the anti-caking agent of the present invention, potassium pyrophosphate, is added, an extremely superior anti-caking effect can be expected compared to when a well-known anti-caking agent is added. Example 2 871 parts of crystalline urea (urea nitrogen: 46.48%), 2111 parts of crystalline ammonium sulfate (ammonium nitrogen: 21.10%)
゜Crystalline 1 phosphorus (ammonium nitrogen: 12.Of3%,
Water-soluble phosphoric acid: 60.89%) 128㎇ crystalline potassium chloride (
While rolling 207 parts of water-soluble power (62.0%) using a rotating plate, industrial commercially available powdered potassium pyrophosphate (water-soluble phosphoric acid: 41.74%, water-soluble carini 55.22%) was rolled. Product) was added at room temperature and rolled for 2 minutes to obtain a raw material for urea-based liquid fertilizer, and then the degree of caking was measured using the same method as described in Example 1. The results are shown in Table 2.

Comparative Examples 5 to 8 The same urea-based liquid fertilizer raw material as in Example 2 was implemented in the case where potassium birophosphate was added at a low cost, and in the case where well-known anti-caking agents: diatomaceous earth, talc, and acid clay were added. Example 2
The same operation as above was performed to measure the degree of consolidation. These results are shown in Table 2.

Table 2

Claims (1)

[Claims] Liquid fertilizer ingredient containing 1 to 10% by weight of potassium pyrophosphate