Process for preparation of copper compounds
A technology of copper complexes and complexes, applied in copper compounds, chemical instruments and methods, botanical equipment and methods, etc., can solve the problems of difficulty in adding copper, high electrical energy consumption, etc.
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Embodiment 1
[0204] Formation of copper triamine complexes as copper fungicide precursors
[0205] step 1 :
[0206] [A] Preparation of initial suspension comprising tetraamine copper complex, TBCS and ammonium sulfate
[0207] Water (70 kg) was charged to the reactor. The temperature was raised to 50°C, and copper sulfate (7.0 kg) was added. The pH was raised to 8.2 with ammonia (32%, 3.0 Kg). The final copper soluble content measured on the filtrate was 0.5% and the ammonium sulfate concentration was 4.5%. The total copper content in the suspension was 2.3%. All % are expressed in m / m.
[0208] [B] Preparation of initial suspension comprising tetraamine copper complex, TBCS and ammonium sulfate
[0209] Alternatively, the initial suspension was prepared without the use of copper sulfate. This preparation was carried out when the neutral suspension obtained in Example 2 was available. A 4.7% ammonium sulfate solution (80 kg) was charged to the reactor. The neutral suspensio...
Embodiment 2
[0219] Formation of copper fungicide, tribasic copper sulfate
[0220] A reactor equipped with a stirrer and pH measurement was charged with 79 Kg of the suspension extracted from the continuous process of step 3 of example 1 . 0.59 liters of sulfuric acid (98%) was added to the reactor at 50° C. to maintain the pH of the suspension containing tetraamine copper complex between 5 and 7 to form TBCS.
[0221] The complete conversion of the suspension before and after neutralization is shown in the table below.
[0222] before neutral after neutral Total Cu% 10 10 Tetraamine Copper Complex% 0.5 0 pH 8-9 5-7
[0223] After neutralization, the suspension was filtered to obtain 41.3 kg of paste. 33 kg of water were added to wash the paste, the mixture was stirred and filtered to obtain a TBCS with a copper content of 53.6%, which was dried in a drying oven at a temperature of 55°C. The filtrate obtained after the second filtration can be add...
Embodiment 3
[0225] Formulation (WG 40% Copper)
[0226] Step 1: Preparation of Fluidized Paste from Washed Paste
[0227] In a tank equipped with a stirrer, 35.8 Kg of the washed paste obtained in Example 2, 1.25 Kg of sodium polynaphthalenesulfonate and 1.88 kg of water were charged. The mixture is stirred, and after stirring, a fluidized paste is obtained which can be used to prepare WG-type formulations. The analysis of the fluidized paste is as follows:
[0228] Dry matter: 56.2%
[0229] Copper content: 28.5%
[0230] Particle size (D50%): 8μm
[0231] Step 2: Preparation of water-dispersible TBCS particles
[0232] In a tank equipped with a stirrer, add 25.24Kg of the fluidized paste obtained in step 1, 1.84Kg of water, 1.44Kg of sodium lignosulfonate, 0.40Kg of sodium xylenesulfonate, 0.09Kg of silicon-based Defoamer for oxane emulsion and 1.71Kg of gypsum. The mixture was stirred, and after stirring, the suspension was wet milled and sent to a drying tower to obtain parti...
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