JPH09316433A - Snow-melting agent and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a snow-melting agent having a snow-melting effect, a soil- improving effect and a herbicidal effect together, large in deliquescence, enabling to easily use the other snow-melting agent inconvenient in view of handling, and capable of sufficiently exhibiting the snow-melting effect, the coil-improving effect and the herbicidal effect only by applying to a snow-covered farm land, etc. SOLUTION: This snow-melting agent has (E1 ) a snow-melting effect, (E2 ) a soil-improving effect and (E3 ) a herbicidal effect, together. This snow-melting agent is obtained e.g. by mixing urea melted at a temperature of approximately 132 deg.C with a substance having both E1 and E2 (e.g. iron alum, calcium or magnesium nitrated magnesium sulfate, a thiosulfate) and a substance having E3 (e.g. a substance obtained by allowing an inorganic carrier such as china clay to adsorb a commercial organic agrochemical or mixing the inorganic carrier with the agrochemical, or sodium chlorate), cooling the obtained urea composite material and subsequently grinding the cooled product into granules.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention is expected in the field of agriculture in snowy areas, and can also be used in fields such as ranches, golf courses, parks and green areas, and by changing the compounding conditions. The present invention relates to a snow melting agent that can be used on general roads including highways and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, calcium chloride has been generally used as a snow melting agent. Calcium chloride is often used as a snow melting agent because it has a deliquescent property and is difficult to handle, but it is inexpensive.

The present invention provides a snow melting agent which is easy to handle, is effective for soil after snow melting, and has a weeding effect, and a method for producing the same.

[0004]

The gist of the present invention will be described.

[0005] The present invention relates to a snow melting agent characterized by having a soil improving effect and a weeding effect in addition to the snow melting effect.

[0006] The snow melting agent according to the first aspect of the present invention relates to a snow melting agent characterized by using urea as a main material.

Further, urea melted at about 132 ° C. is mixed with a substance having a snow melting effect and a substance having a herbicidal effect to form a urea complex, and the urea complex is cooled and then pulverized into particles. And a method for producing a snow melting agent.

[0008] Further, urea melted at about 132 ° C is mixed with a substance having both a snow melting effect and a soil improving effect and a substance having a herbicidal effect to form a urea complex, and the urea complex is cooled and then ground. The present invention relates to a method for manufacturing a snow melting agent, which is characterized in that it is formed into particles.

Further, in the method for producing a snow melting agent according to claim 4, iron alum, calcium or magnesium nitrate, magnesium sulfate, thiosulfate, potassium or ammonium is used as the substance having both the snow melting effect and the soil improving effect. Hydrogen phosphate (first salt, second salt), magnesium potassium chloride hydrate, magnesium ammonium chloride hydrate, magnesium ammonium sulfate hydrate, etc. The present invention relates to a method for manufacturing a snow melting agent, which is characterized in that a combination thereof is adopted.

Further, in the method for producing a snow melting agent according to claims 3 and 4, as the substance having the herbicidal effect, sodium chlorate or an organic compound in an inorganic carrier such as white earth, activated carbon, zeolite or silica gel. The present invention relates to a method for producing a snow melting agent, characterized by using a substance obtained by adsorbing or mixing a powdered or granular product of a commercial agricultural chemical.

Further, the snow melting agent according to claim 1 is characterized in that sodium gluconate, potassium gluconate, and alcohols are adopted as the substances having a soil improving effect.

Further, urea melted at about 132 ° C. is mixed with a substance having both a snow melting effect and a soil improving effect to form a urea complex, and the urea complex is cooled and then pulverized into granules. The present invention relates to a method for producing a snow melting agent, which comprises adding a substance having a herbicidal effect to the urea complex.

[0013]

ACTION AND EFFECT OF THE INVENTION The present inventors have found that urea, which has a soil-improving effect, has a characteristic that it can be incorporated into various substances in a molten state (urea matrix) at a relatively low temperature of about 132 ° C. Along with having found that it is water-soluble and has a molecular freezing point depressing action (snow melting action) like calcium chloride, and mixing various substances in the urea matrix, specifically, substances having a snow melting effect and a herbicidal effect, We have completed a snow-melting agent that has three effects: snow-melting effect, soil improvement effect and weeding effect.

The present invention solves this problem even with substances that have been conventionally inconvenient as a snow melting agent in general. For example, even if a substance that has a large deliquescent property and is inconvenient to handle is covered with the urea matrix, the deliquescent property is eliminated.

Further, by mixing the urea matrix with a substance having a snow melting effect and a soil improving effect as well as a substance having a herbicidal effect, the snow melting effect and the soil improving effect can be obtained just by spraying it on, for example, an agricultural area having snow. Not only can it exhibit its herbicidal effect, but also its herbicidal effect will be fully exerted.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION In this example, as substances (inorganic compounds) having both a snow melting effect and a soil improving effect that can be incorporated into a urea matrix, ammonium or potassium iron alums, potassium nitrate, magnesium nitrate, magnesium sulfate are used. , A double salt hydrate such as ammonium hydrogen phosphate (first salt, second salt), potassium thiosulfate, magnesium ammonium chloride or magnesium potassium chloride, magnesium ammonium sulfate. These substances are water-soluble like the above-mentioned urea and have a snow melting effect by the same molecular freezing point depressing action as calcium chloride, and each of them can also be adsorbed as an ion to the soil colloid to exert a soil improving effect as a plant nutrient component. It is a substance that can.

Further, as a substance having a herbicidal effect (herbicide) which can be incorporated into a urea matrix, sulfonylurea herbicides such as prodiamine, chlorsulfuron and bensulfuronmethyl, imidazolinone herbicides, urea, Amide type, triazine type, cyclohexadione type,
Substances such as diphenyl ether type, aryl oxyphenoxy propionic acid type, triclopyr, atrazine, and tetrapion are used.

The herbicide (mixed drug) to be mixed with the urea matrix can be mixed as it is in a powder product, but in order to prevent uneven mixing, activated carbon, activated clay and acid clay are mixed. It is advisable to use those adsorbed or diluted and mixed with other porous materials such as bentonite, talc, zeolites and silica gel.

The following is a snow-melting agent produced by actually mixing a urea matrix with a substance having both the snow-melting effect and the soil-improving effect and a substance having a herbicidal effect.

Example 1 Urea was heated and melted to a melting point of 132 ° C. to form a urea matrix, and then the substances shown in Tables 1 to 7 below were added into the urea matrix. Is the weight ratio) to form the urea complex A, and then the urea complex A is stirred, immediately taken out of the container and cooled (returned to room temperature) to solidify, The urea complex A is crushed with a flat plate roller or a grooved roller to produce a granular snow melting agent.

[0021]

[Table 1]

[0022]

[Table 2]

[0023]

[Table 3]

[0024]

[Table 4]

[0025]

[Table 5]

[0026]

[Table 6]

[0027]

[Table 7]

The granular snow-melting agent obtained as described above is coated with a urea matrix of the above-mentioned inorganic compound, which has been difficult to handle in the past. It becomes a snow melting agent. Then, once sprayed on the snow surface, the water-soluble inorganic compound eluted and liberated from the urea matrix exerts the effect of depressing the molecular freezing point so that the snow melting effect is sufficiently exerted. Also, the plant nutrient component of the inorganic compound exerts a soil improving effect (plant nutrient imparting effect), and the herbicide exerts a herbicidal effect. Furthermore, since the solidified urea complex A can be easily crushed and molded, the production efficiency is improved accordingly.

Next, Example 2 will be described in which the urea matrix is not mixed with a substance having a herbicidal effect.

Experimental Example 2 Urea was heated and melted to a melting point of 132 ° C. to form a urea matrix, and subsequently, a substance as shown in Table 8 below (a number written together with the substance was put into the urea matrix). Is added to form a urea complex B, and then the urea complex B is stirred, immediately taken out of the container, and cooled (returned to room temperature) to be solidified. The body B is crushed by a flat roller or a grooved roller to produce a granular snow melting agent.

[0031]

[Figure 8]

In the granular snow-melting agent obtained as described above, since the inorganic compound, which has been conventionally difficult to handle as described above, is coated with the urea matrix, the deliquescent property is reduced, and the snow-melting agent can be stored and sprayed. It becomes the optimum snow melting agent. Then, once sprayed on the snow surface, the molecular melting point depressing action by the water-soluble inorganic compound eluted and liberated from the urea matrix is exerted sufficiently and the snow melting effect is sufficiently exerted. The plant nutrient component of the inorganic compound exerts a soil improving effect (plant nutrient imparting effect).

Further, for example, after solidifying the urea complex B, a substance having another effect is added when the urea complex B is granulated into a snow melting agent, or the urea complex B granulated ( When actually applying the snow-melting agent, a substance having another effect may be blended and then sprayed.

That is, the urea complex B formed in this granular form
Since the (snow melting agent) becomes chemically stable and can be used in combination with other functional components, the granular urea complex B (snow melting agent) has the snow melting effect and soil improving effect.
For example, a substance having a herbicidal effect and a soil disinfecting effect (insecticidal effect, bactericidal effect) can be added. This point
See Examples 3 and 4.

Example 3 First, urea was heated and melted to a melting point of about 132 ° C., and the following several inorganic compounds “urea 3: magnesium potassium chloride hydrate 7: (magnesium potassium chloride) 6: Hydrate 1): Ammonium hydrogen phosphate 3 (phosphoric acid 2: Ammonium hydrogen 1): Iron powder 0.5 ”(the numbers given together with the substances are weight ratios) were added to the mixture to form a urea complex. B is formed, and subsequently, the urea complex B is stirred, immediately taken out of the container, and cooled (returned to room temperature) to be solidified, and the urea complex B is crushed by a flat plate roller or a grooved roller. A granular snow melting agent is produced.

Subsequently, the herbicide for grass turf, prodiamine, is adsorbed and diluted with porous zeolite and mixed with the above-mentioned granular snow melting agent at a mixing ratio of 0.3% of the total weight. The herbicide for grass, prodiamine, which has been adsorbed and diluted by porous zeolite may be in the form of powder or granules, but granules are preferable in consideration of the ease of handling.

Example 4 First, urea was heated and melted to a melting point of about 132 ° C., and the following several inorganic compounds “urea 3: magnesium ammonium sulfate hydrate 7 (magnesium ammonium sulfate 6) were added. : Hydrate 1): potassium hydrogen phosphate 3
(Hydrogen phosphate 2: potassium 1): Calcium nitrate hydrate 5 (calcium nitrate 4: hydrate 1) ”(the numbers written together with the substances are weight ratios) are added to the mixture to add urea complex B.
Then, the urea complex B is stirred, immediately taken out of the container and cooled (returned to room temperature) to be solidified, and the urea complex B is crushed with a flat plate roller or a grooved roller to form a granular form. Manufactures a snow melting agent.

Subsequently, this urea complex B was mixed with granular calcium chlorate hydrate 3 (calcium chlorate 2: hydrate 1), and 0.3% of the total weight of dilon soil disinfectant. The granular acid clay containing is mixed.

Further, the present inventor did not adopt urea, but adopted sodium gluconate, potassium gluconate, alcohols and the like as substances having a soil improving effect instead of urea, and the results are shown in Tables 9 and 10 below. By mixing the substances as shown (the numbers written together with the substances are weight ratios), it was possible to complete a snow melting agent having a soil improving effect and a weeding effect in addition to the snow melting effect.

[0040]

[Table 9]

[0041]

[Table 10]

Claims (8)

[Claims] 1. A snow melting agent having a soil improving effect and a weeding effect in addition to the snow melting effect. 2. The snow melting agent according to claim 1, wherein urea is a main material. 3. A urea complex is formed by mixing a substance having a snow-melting effect and a substance having a herbicidal effect with urea melted at about 132 ° C., and the urea complex is cooled and then pulverized into granules. A method for producing a snow melting agent, comprising: 4. A urea complex is formed by mixing a substance having both a snow-melting effect and a soil improving effect and a substance having a herbicidal effect with urea melted at about 132 ° C. to form a urea complex, and the urea complex is crushed after cooling. A method for producing a snow-melting agent, which is characterized in that 5. The method for producing a snow melting agent according to claim 4, wherein the substance having both the snow melting effect and the soil improving effect is iron alum, calcium or magnesium nitrate, magnesium sulfate, thiosulfate, potassium or ammonium. Hydrogen phosphate (first salt, second salt), magnesium potassium chloride hydrate, magnesium ammonium chloride hydrate, magnesium ammonium sulfate hydrate, etc. A method for producing a snow-melting agent, characterized in that a combination thereof is adopted. 6. The method for producing a snow melting agent according to any one of claims 3 and 4, wherein the substance having a herbicidal effect is sodium chlorate, or an inorganic carrier such as white earth, activated carbon, zeolite or silica gel. A method for producing a snow melting agent, characterized in that a substance obtained by adsorbing or mixing a powdered or granular product of a commercial agricultural chemical that is an organic compound is used. 7. The snow melting agent according to claim 1, wherein sodium gluconate, potassium gluconate, and alcohols are used as the substance having a soil improving effect. 8. A urea complex is formed by mixing a substance having both a snow melting effect and a soil improving effect with urea melted at about 132 ° C., and the urea complex is cooled and then pulverized into granules. A method for producing a snow-melting agent, comprising adding a substance having a herbicidal effect to the urea complex described in 1.