Preparation process of botanical molluscacide
A molluscicide, plant-based technology, applied in the field of environment-friendly plant-based molluscicide, can solve the problems of environmental pollution, high toxicity of humans and animals, etc., and achieve the effects of strong penetrating ability, improved purity and quality, and low energy consumption
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Embodiment 1
[0022] Put 2.6kg of tea meal powder through a 16-24 mesh sieve into an extraction tank, use 40% methanol-acetone (3:1) aqueous solution of 10 times the dry weight (W / W) of tea meal powder, at 70°C Under reflux extraction for 3 times, each time for 2 hours, the combined extracts were filtered; the filtrate was selected from a polysulfone membrane with a molecular weight cut-off of 50,000, and the membrane was separated to remove impurities under the operating pressure of 0.5MPa; after removing macromolecular impurities such as proteins and polysaccharides, The filtrate is selected from a polysulfone membrane with a molecular weight cut-off of 3000, and the membrane is separated and concentrated into a concentrated solution of 9 to 15 degrees Baume (60°C) under the operating pressure of 1.5MPa; adding 0.5 to 1.3% of the concentrated solution weight of salt and 0.3 to 0.9 % Calcium Hydroxide (W / W), made into a liquid dosage form plant-based molluscicide. After determination, the ...
Embodiment 2
[0024] Put 2.4kg of tea meal powder through a 16-24 mesh sieve into an extraction tank, extract 2 times at 50°C with 30% methanol aqueous solution of 15 times the dry weight (W / W) of tea meal powder, and extract 2 times each time for 3 hours, combined extracts, and filtered; the filtrate was selected from a polysulfone membrane with a molecular weight cut-off of 60,000, and the membrane was separated to remove impurities under the operating pressure of 0.25 MPa; Amide membrane, under the operating pressure of 1.5MPa, the membrane is separated and concentrated into a concentrated solution of 9-15 degrees Baume (60°C); adding 0.5-1.3% of the concentrated solution's weight of salt and 0.3-0.9% of calcium hydroxide (W / W), make the botanical molluscicide of liquid dosage form. It is determined that the yield of tea saponin in the tea dregs is 90.7%, and the content of tea saponin in the liquid dosage form vegetable molluscicide reaches 69.2%.
Embodiment 3
[0026] Put 3.2 kg of tea meal powder through a 16-24 mesh sieve into an extraction tank, use 50% aqueous methanol solution of 5 times the dry weight of tea meal powder (W / W), reflux extraction at 80°C for 1 hour, filter, The filtrate uses a polysulfone membrane with a molecular weight cut-off of 80,000, and the membrane separates and removes impurities under the operating pressure of 0.1MPa; after removing macromolecular impurities such as proteins and polysaccharides, the filtrate uses a sulfonated polysulfone membrane with a molecular weight cut-off of 500, and operates at 1.5MPa Membrane separation and concentration under pressure conditions into a concentrated solution of 9 to 15 degrees Baume (60°C); adding 0.5 to 1.3% of the weight of the concentrated solution of salt and 0.3 to 0.9% of calcium hydroxide (W / W) to make a liquid dosage form botanical molluscicide. After determination, the yield of tea saponin in tea dregs is 92.9%, and the content of tea saponin in the liq...
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