KR20030055986A - A manufacturing method for the bordeaux mixture - Google Patents

Abstract

PURPOSE: A process of preparing a lime-Bordeaux liquid by using calcium hydroxide instead of quicklime is provided which provides solution to problem of phytotoxicity of conventional lime-Bordeaux liquid as well as sludge problem while reducing a hydration time without cooling process. CONSTITUTION: Calcium hydroxide and copper sulfate are dissolved in water respectively to produce a first and second solution. The first and second solutions are blended by slowly agitating and the mixed liquid is then blended with zinc sulfate and sugar.

Description

A manufacturing method for the bordeaux mixture

The present invention relates to a method for producing a lime bordea solution. More specifically, the present invention relates to a method for preparing a weakened lime bordea solution prepared by mixing calcium hydroxide and copper sulfate and then adding zinc sulfate and sugar.

Conventional lime Bordeaux liquid is calcium hydroxide (Ca (OH) ₂ ) is generated by the hydration reaction when left for 1-2 hours by adding quicklime (CaO) to water to form a strong alkaline solution of pH 12.2 ~ 12.4 4 In the case of -4 meals (400 g of copper sulfate based on 100 l of water and 400 g of quicklime), calcium hydroxide solution was prepared in about 20% (about 100%) of the total amount based on 500 l of SS group. (About 400 L).

As described above, conventional lime bordeaux liquid is made by mixing quicklime with copper sulfate. Among these components, quicklime is inconvenient to handle and dissipates heat by reacting with water, which requires cooling time in the preparation of bordeaux solution. .

In view of the above, the present inventors prepared a first solution by dissolving a calcium hydroxide powder in water, preparing a second solution by dissolving copper sulfate in water, and then mixing the second solution with the first solution. After preparing a lime bordeaux solution by adding zinc sulfate and sugar to the mixed solution, the present invention was completed by investigating pH and sedimentation change with time of the lime bordeaux solution.

Accordingly, an object of the present invention is to prepare a first solution by dissolving the powder of calcium hydroxide in water, to prepare a second solution by dissolving copper sulfate in water, to stir the second solution in the first solution, and then to mix the sulfuric acid in the mixed solution The present invention provides a method for preparing a lime bordeaux solution prepared by adding zinc and sugar.

The object of the present invention is to prepare a first solution by dissolving the powder of calcium hydroxide in water, to prepare a second solution by dissolving copper sulfate in water and to stir the second solution in the first solution and to stir the zinc sulfate in the mixed solution After preparing the lime Bordeaux liquid by the addition of sugar and sugar was achieved by examining the pH and sedimentation change with time of the lime Bordeaux solution.

Hereinafter, the configuration of the present invention.

1 is a schematic manufacturing process diagram of the lime bordo liquid of the present invention.

The present invention comprises the steps of preparing a variety of conventional lime bordeaux solution using quicklime and investigating changes in pH and sedimentation intensity over time of each solution; Instead of quicklime, dissolve calcium hydroxide powder in water to prepare a first solution, dissolve copper sulfate in water to prepare a second solution, stir the second solution to the first solution, gradually mix, and then add zinc sulfate and sugar to the mixed solution. After preparing the lime Bordeaux solution consists of a step of investigating the pH and sedimentation change with time of the lime Bordeaux solution.

In the present invention, hydrated, dried and ground calcium hydroxide (Ca (OH) 2) is used, which not only solves the problem of hydration time and sludge treatment, which is the most problematic in conventional Bordeaux liquid preparation, but also changes in calcium hydroxide activity (pH change). It hardly falls in comparison with quicklime (see Table 1).

division 0 min 5 minutes 10 minutes 30 minutes 60 minutes quicklime 12.7 12.7 12.4 11.9 11.9 Calcium hydroxide 12.6 12.6 12.3 11.8 11.9

The powder level of the calcium hydroxide powder used in the present invention is about 450 mesh (average particle diameter: 1.2 μm), which is very fine calcium hydroxide (more than 99% purity), and the amount used is 74.1 ÷ 56.1 = 1.32 in consideration of the molecular weight 56.1 of quicklime and the molecular weight 74.1 of calcium hydroxide. 4 kg x 1.32 = 5.28 kg based on 4 kg of quicklime, multiplied by relative ratio of 1.32, thus calcium hydroxide is used for 5.28 kg.

The use of zinc sulfate used in the present invention is a weakening agent and sugar serves to improve dispersibility and shelf life. Zinc sulfate has a milder alleviating effect than copper sulfate. Weakness depends on the concentration of Bordeaux solution. 4-12 Bordeaux solution and 4-8 Bordeaux solution do not show any harm, but 6-6 Bordeaux solution appears weak. In this case, 150 g of zinc sulfate is available when 600 g of copper sulfate is used, and no weakness occurs when growing zinc sulfate instead of copper sulfate even in growing season. Sugar is usually used when pesticide dispersibility is poor. In the case of lime Bordeaux liquid, copper sulfate dissolves well in water, but lime does not dissolve well in water and sinks after a certain time. Therefore, it is necessary to adjust the lime so that it does not sink quickly. When sugar is used, the rate of lime sinking can be slowed down.

Hereinafter, the specific method of the present invention will be described step by step with reference to Examples, but the scope of the present invention is not limited only to these Examples.

Example 1 Preparation of Lime Bordeaux Liquid and Change of Physical Properties

To prepare a conventional lime Bordeaux liquid in the same ratio as in Table 3.

Composition ratio by type of conventional lime Bordeaux liquid Kinds Copper sulfate (g) Quicklime (g) Water (ℓ) 8-8 meals 800 800 100 6-6 meals 600 600 100 4-8 meals 400 800 100 4-4 meals 400 400 100 4-12 meals 400 1,200 100

The change in pH and sedimentation with time of the conventional lime Bordeaux solution prepared as described above was investigated. The investigation results are shown in Table 3 below.

Kinds division 0 min 15 minutes 30 minutes 60 minutes 8-8 meals pH 12.7 12.4 12.3 11.9 Sedimentation degree 100 97 95 82 4-4 meals pH 12.6 12.5 12.5 12.2 Sedimentation degree 100 95 95 86 4-12 meals pH 12.8 12.5 12.2 12.0 Sedimentation degree 100 55 49 41

Example 2 Investigation of Physical Change of Lime Bordeaux Liquid

Instead of quicklime, calcium hydroxide powder was dissolved in water to prepare a first solution, and copper sulfate was dissolved in water to prepare a second solution. The first solution and the second solution were slowly stirred to mix, and then zinc sulfate and sugar were added to the mixed solution. Various kinds of lime bordeaux liquid were prepared by varying the composition ratio of each component. The composition ratio of each type of lime Bordeaux liquid is shown in Table 2 below.

Kinds Copper sulfate (g) Calcium hydroxide (g) Water (ℓ) Zinc Sulfate (g) Sugar (g) 8-8 meals 800 1,056 100 200 20 6-6 meals 600 792 100 150 15 4-8 meals 400 1,056 100 100 10 4-4 meals 400 528 100 100 10 4-12 meals 400 1,584 100 100 10

The pH and sedimentation change of the lime bordea solution of the present invention prepared as described above were investigated. The investigation results are shown in Table 5 below.

Kinds division 0 min 15 minutes 30 minutes 60 minutes 8-8 meals pH 12.7 12.5 12.2 12.0 Sedimentation degree 100 98 97 91 4-4 meals pH 12.6 12.5 12.5 12.2 Sedimentation degree 100 98 97 96 4-12 meals pH 12.7 12.6 12.3 12.0 Sedimentation degree 100 65 55 48

As can be seen in Examples 1 and 2, the lime Bordeaux solution of the present invention by using a calcium hydroxide powdered and dried by filtration and drying after reacting with water instead of quicklime, the physical changes such as pH and sedimentation strength are almost the same Compared to the lime bordeaux solution used in the absence of filtration, it was found that it had an excellent effect without fear of weakening. In addition, the quicklime is inconvenient to handle and dissipates heat by reacting with water, thus requiring a separate cooling time and a cooling means, but instead of the quicklime of the present invention, the lime bordea solution using calcium hydroxide does not require these cooling times and cooling means, and thus time and energy. There is an advantage to save.

As described above, the lime Bordeaux solution of the present invention, as described through the above examples and experimental examples, does not require cooling by using calcium hydroxide powdered and dried by filtration and drying instead of quicklime to shorten the hydration time and solve the sludge treatment problem. As well as being able to solve the problem of weakness of the conventional lime Bordeaux solution, it is an industrially useful invention as agricultural materials.

Claims (1)

Dissolving calcium hydroxide in water to make a first solution; Dissolving copper sulfate in water to form a second solution; Slowly mixing the second solution with the first solution of the step; Method of producing a lime bordeaux solution comprising the step of adding zinc sulfate and sugar to the mixed solution of the step.