Preparation method and application of mineral source humic acid
A humic acid, carbon-based nanotechnology, applied in applications, agriculture, organic fertilizers, etc., can solve the problems of easy condensation, low content of active groups, poor permeability, etc.
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Embodiment 1
[0012] Example 1: Preparation of carbon-based nano-mineral source humic acid HA1
[0013] Weigh 10.00g of weathered coal with a 0.150mm sieve and place it in a 250ml three-necked flask, add 100ml of dilute hydrochloric acid with a mass fraction of 15% for activation, stir for 1h, filter and wash until there is no chloride ion, transfer the precipitate to a 250ml three-necked flask, Then add 15% (mass fraction) potassium hydroxide 100ml and a certain amount of grain growth regulator (fatty alcohol polyoxyethylene ether, 1g) and polymer additives (ammonium polyacrylate 1g + carboxymethyl cellulose 0.5g), Under high shear technical conditions (shear speed is 5000r.min -1 ), stir evenly, then put it in a constant temperature water bath at 60°C, stir for 2.5h, and after aging for 5h, take out the upper layer solution, add 20% (mass fraction) tartaric acid to the solution, adjust to pH=3, and centrifuge machine at 4000r.min -1 Centrifuge at rotating speed for 30min, wash the lower...
Embodiment 2
[0014] Example 2: Preparation of carbon-based nano-mineral humic acid HA2
[0015] Weigh 10.00g of weathered coal with a 0.150mm sieve and place it in a 250ml three-necked flask, add 100ml of dilute hydrochloric acid with a mass fraction of 15% for activation, stir for 1h, filter and wash until there is no chloride ion, transfer the precipitate to a 250ml three-necked flask, Then add 15% (mass fraction) potassium hydroxide 100ml and a certain amount of grain regulator (sodium dodecyl sulfate, 1g) and polymer additives (polyacrylate potassium 1.5g), under high shear technical conditions ( Shearing speed is 5000r.min -1 ), stir evenly, then put it in a constant temperature water bath at 60°C, stir for 2.5h, and after aging for 5h, take out the upper layer solution, add 20% (mass fraction) tartaric acid to the solution, adjust to pH=3, and centrifuge machine at 4000r.min -1 Centrifuge at rotating speed for 30min, wash the lower sediment with distilled water until no acid ions, ...
Embodiment 3
[0016] Example 3: Preparation of humic acid sulfur-based fertilizer A
[0017] At high temperature (60°C to 90°C), 5 wt % of the carbon-based nano-mineral humic acid HA1 prepared in Example 1, 85 wt % of molten sulfur and the balance of dry bentonite powder were mixed. Molten sulfur is received by tank trucks at high temperature (110°C to 120°C) and pumped into sulfur storage tanks and heated to keep the temperature above the melting point. Bulk bentonite powder and humic acid are received by truck. Molten sulfur is then pumped into a mixing tank where bentonite and humic acid are added and mixed. The mixture is then maintained at a temperature between 60°C and 90°C with continuous stirring. The mixture was then filtered through a 0.4 mm screen and transferred to a second tank (day tank) with agitation at a temperature ranging from 60°C to 80°C. The mixture is fed from the Day Tank to a rotating nozzle dispenser, which drips the mixture onto a water-cooled, continuously mov...
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