EA014987B1 - Fungicidal composition and a method for preparing thereof - Google Patents

Abstract

The invention relates to chemical agents of plants protection against diseases and can be used in processes of growing agricultural crops. A new fungicidal composition a method for preparing thereof are described. The fungicidal composition comprises ammophos, ammonia, copper nitrate, blustone, urea and calcium oxide in corresponding component ratio. Adding the calcium oxide enhances the composition quality. When preparing a solution for spraying plants against diseases no precipitation is observed resulting in better coverage of plants and enhancing efficiency of plant's protection. The test results of fungicidal composition technological features (pH, rate of solution settling) are also provided.

Description

The invention relates to chemical plant protection products, and specifically to methods for producing fungicidal compositions based on inorganic copper compounds.

A known method of producing a fungicide based on an inorganic compound of copper (copper chloride) from copper-ammonia etching solutions of printed circuit boards by processing etching solutions with hydrochloric acid to a pH of 5.8-6.3, followed by separation of the product from the liquid phase by filtration and drying [1].

The main disadvantages of this method is the multi-stage process and the presence of waste products in the form of ammonium chloride.

The closest to the achieved result and technical essence is a method for producing a copper-containing fungicide with high activity in the interaction of an aqueous solution of ammophos, ammonia, sulfate or copper nitrate (11) and urea [2, 3].

The technical problem, which cannot be solved by a known method, is the rapid separation of the aqueous suspension of the fungicidal composition, which causes uneven surface treatment of the plants. In addition, due to the large dispersion of particles, such a fungicidal composition has poor hiding power, is poorly retained on the surface of leaves, and is quickly washed away by rains from the leaf surface of protected plants.

The objective of the invention is to increase the stability of an aqueous suspension of fungicide to delamination over time.

The problem in the present invention is solved by the fact that a new fungicide composition is proposed, including ammophos, ammonia, copper (nitrate or sulfate), urea, characterized in that calcium oxide is additionally added at a content, wt.%:

Ammophos 0.35-0.40 ammonia 0.10-0.12 copper 0.70-0.80 Urea 0.10-0.12 Calcium oxide 0.14-0.40 Water Rest

A method of obtaining the proposed fungicidal composition, including processing a solution of ammophos with ammonia, an aqueous solution of an inorganic salt of copper (11) and urea, is achieved by the fact that CaO is added to the resulting mixture with a mass ratio of CaO: Cu = (0.2-0.5): one.

An essential feature of the proposed method is the additional introduction of calcium hydroxide into the reaction mixture at a mass ratio of CaO: Cu = (0.2-0.5): 1.

The introduction of calcium hydroxide in the indicated mass ratios makes it possible to obtain an aqueous suspension of a fungicidal composition that is resistant to delamination during the entire treatment of plants. At the same time, uniform coverage and long-term retention of the fungicidal composition on the leaf surface of protected plants is ensured, which is an important condition for obtaining a high protective effect when using fungicides. Fine dispersion of the fungicidal composition is achieved by the fact that in the presence of calcium oxide a mixture of compounds is formed: finely divided bulk crystals of tricalcium phosphate, hydroxylapatite, complex compounds of copper and ammonium phosphates in combination with calcium.

The invention is illustrated by the following examples.

Example 1. To obtain 300 g of fungicidal composition containing (wt.%) 0.38 ammophos; 0.75 three-water copper nitrate (11); 0.3 urea; 0.11 ammonia, a suspension of 1.14 g of ammonia is dissolved in 150 g of water, and 0.11 g of ammonia is added with stirring as an aqueous solution. After this, 2.28 g of trihydrous copper nitrate (11) dissolved in 120 g of water and 0.9 g of urea are added to the resulting suspension, stirred and the resulting suspension is adjusted with water to 300 g. After stirring for 60 minutes, the pH of the suspension and the rate are measured delamination of the suspension in beakers with a diameter of 25 mm. The measurement results are entered in the table.

Example 2. To obtain a fungicidal composition, as in example 1, a weighed amount of ammophos 1.14 g is dissolved in 150 g of water, and in each individual embodiment, 0.06 is added to the ammophos solution with stirring; 0.12; 0.18; 0.24; 0.30; 0.36 g of CaO (CaO: Cu ratio, respectively 0.1; 0.2; 0.3; 0.4; 0.5; 0.6), then the experiment is completed, as in example 1, and pH and suspension delamination rates. The results of the experiment are entered in the table.

The measurement results for examples 1 and 2 are shown in the table.

- 1 014987

Experience number CaO consumption pH of the finished solution The clarification rate of the fungicidal composition, mm / hour By weight, g By ratio SaO: C G - - 7.7 330 2 0.06 0.1 7.6 85 3 0.12 0.2 7.7 25 4 0.18 0.3 7.7 25 5 0.24 0.4 7.8 fifteen 6 0.30 0.5 8.0 10 7 0.36 0.6 8.4 10

* The experiment was performed according to example 1 description

As can be seen from the table, the rate of separation of the fungicidal composition obtained by the prototype (experiment 1 without the addition of CaO) is 330 mm / h, which causes significant difficulties when processing plants, requires constant mixing during processing. The rapid separation of the fungicide suspension causes an uneven coating of the leaf surface of the protected plants, which, on the one hand, leads to insufficient effectiveness of the fungicide preparation, and on the other hand, can cause plant burns (with local increases in the concentration of fungicide on the leaf surface).

An additional introduction of calcium hydroxide into the fungicidal preparation led to a significant decrease in the delamination rate of the suspension, while the optimal ratio of CaO to copper was 0.2-0.5. With a larger ratio of components (0.6), the positive effect faded, while the pH of the suspension increased to 8.4, which is undesirable for plants, as it can cause burns.

According to the applicants, the proposed composition of the fungicide meets the criterion of novelty, since no similar composition has been found in the sources of information.

The proposed fungicide meets the criterion of inventive step, since the proposed composition differs from the known analogue in its qualitative characteristics and meets the criterion of industrial applicability on the basis that its production is possible at any chemical enterprise, including chemical laboratories.

Information sources

1.8I 1749177, IPC ⁵ С01О 3/06, 23.07. 92. Bull. Number 27.

2.8I 1338133 MKI Α01Ν 47/28, 59/00, 59/26, 1984. Publ. 09/15/87. Bull.№ 34 (prototype).

3. Pat. RB No. 37, 1993. Bull. Number 1.

Claims (2)

CLAIM 1. Fungicidal composition, including ammophos, ammonia, copper (nitric acid or sulfate), urea, characterized in that it additionally contains calcium oxide, with a mass ratio of CaO: Cu = (0.2-0.5): 1 in the following ratio of components %: Ammophos 0.35-0.40 Ammonia 0.10-0.12 Copper 0.70-0.80 Urea 0.10-0.12 Calcium oxide 0.14-0.40 Water Rest 2. The method of obtaining the fungicidal composition according to claim 1, comprising treating the solution of ammophos with ammonia, an aqueous solution of an inorganic salt of copper (11) and urea, characterized in that CaO is added to the resulting mixture with a mass ratio of CaO: Cu = (0.2- 0.5): 1. Eurasian Patent Organization, EAPO Russia, 109012, Moscow, Maly Cherkassky per., 2