A kind of preparation method of fulvic acid calcium magnesium fertilizer
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A technology of calcium fulvate and fertilizer, which is applied in the field of preparation of calcium and magnesium fulvic acid fertilizer, can solve problems such as destruction of beneficial soil bacteria, secondary environmental damage, secondary wastewater pollution, etc., so as to increase the content of soil organic matter and stimulate plants Growth, the effect of increasing soil organic matter
Active Publication Date: 2018-12-28
LIAONING PUTIAN TECH
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Problems solved by technology
Some people have used guronic acid waste liquid to produce oxalic acid by oxidation method, but because the process involves sulfuric acid cycle and nitric acid cycle, the equipment requirements are high, the investment is large, and it will also produce secondary wastewater pollution and possible NO, NO 2 Such waste gas pollution caused secondary damage to the environment, so many similar projects were shelved; some people used its organic matter and acidity to make soil improvers, but due to the influence of the bacteria carried by gulonic acid, the beneficial bacteria in the soil were destroyed, making the Its application is limited
Therefore, the harmless treatment and rational utilization of gulonic acid mother liquor has become a technical problem restricting the development of the Vc industry
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Embodiment 1
[0027] This embodiment provides a preparation method of calcium magnesium fulvic acid fertilizer, which includes the following steps.
[0028] Step 1. Add the original humic acid powder into the gulonic acid mother liquor and stir it fully for 1 hour, so that insoluble or insoluble substances such as insolubles, pigments, bacteria, and proteins in the guron acid mother liquor are absorbed by the humic acid, and then centrifugally filtered. The filtrate is collected, and the obtained filter residue is used to produce humic acid paste fertilizer.
[0029] The addition amount of the original humic acid powder is 15% of the gulong acid mother liquor.
[0030]Step 2, add the ferrous sulfate of mass fraction 7% in gained filtrate, fully stir, make it and oxalic acid generate ferrous oxalate yellow precipitate, collect filtrate after filtering, excessive ferrous sulfate remains in filtrate as trace element. Ferrous oxalate is purified as a by-product and used as a raw material for t...
Embodiment 2
[0066] This embodiment provides a preparation method of calcium magnesium fulvic acid fertilizer, which includes the following steps.
[0067] Step 1. Add sodium humate into the guaronic acid mother liquor, and stir thoroughly for 1 hour, so that insoluble or insoluble substances, pigments, bacteria, proteins, etc. The filtrate and the obtained filter residue are used to produce humic acid paste fertilizer.
[0068] The add-on of described sodium humate is 5% of gulonic acid.
[0069] Step 2, add 8% ferrous sulfate in mass fraction to the obtained filtrate, stir fully, make it and oxalic acid generate ferrous oxalate yellow precipitate, collect the filtrate after filtering, and excess ferrous sulfate remains in the solution as trace elements.
[0070] Step 3, using calcium oxide to adjust the pH value of the gulonate mother liquor to 4, and simultaneously generate calcium guronate containing CaO ≥ 48g / L; then use magnesium hydroxide to neutralize the pH value of the liquid to...
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Abstract
The invention discloses a method for preparing fulvic acid calcium magnesium fertilizers. The method includes the steps that 1, raw humic acid powder or sodium humate is added into gulonic acid mother liquor, the mixture is sufficiently stirred for 1 hour and centrifugally filtered, and filter liquor is collected; 2, ferrous sulfate is added into the filter liquor to be stirred, the mixture and oxalic acid generate ferrous oxalate, and filter liquor is collected after filtering is carried out; 3, the pH value of the obtained filter liquor is adjusted through calcium oxide to 2 to 4, the filter liquor is neutralized through magnesium hydrate till the pH value of the filter liquor ranges from 4 to 5, filtering is carried out, and filter liquor is collected; 4, the collected filter liquor is neutralized through potassium hydroxide till the pH value of the collected filter liquor ranges from 6 to 6.5, and fulvic acid calcium magnesium fertilizer intermediate products are obtained; 5, nutrients are added into the intermediate products, the mixture is mixed, dissolved and filtered, and filter liquor is prepared into the fulvic acid calcium magnesium fertilizers. According to the method, fulvic acid which can be conveniently absorbed by plants is generated after scientific harmless treatment is carried out on the gulonic acid mother liquor, the functional fulvic acid calcium magnesium fertilizers are prepared through the chelation performance of the fulvic acid, and the fulvic acid calcium magnesium fertilizers have the effects of resisting drought and diseases, promoting growth of crops and improving soil.
Description
technical field [0001] The invention relates to the technical field of novel fertilizers, in particular to a preparation method of calcium magnesium fulvic acid fertilizer. Background technique [0002] Fulvic acid has the unique effects of small molecular weight, high active gene, improving soil, increasing ground temperature, promoting root system development, effectively adjusting soil pH, and solving soil compaction. In the case of dry climate, it can reduce the stomatal opening of crops and has the effect of drought resistance. Fulvic acid is used in conjunction with other inorganic fertilizers (such as nitrogen, phosphorus, potassium, etc.), which can fix nitrogen, decompose phosphorus, and release potassium slowly, promote the transformation of active ingredients, be absorbed and utilized by crops as soon as possible, and improve the utilization rate of various active ingredients. [0003] The application of fulvic acid in vegetables: mainly to prevent the pollution ...
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