Silicon-titanium fertilizer and preparation method thereof

Abstract

The invention relates to the technical field of water-soluble fertilizers, and discloses a silicon-titanium fertilizer and a preparation method thereof, the silicon-titanium fertilizer comprises the following raw materials by weight: 35-45 parts of potassium silicate, 10-15 parts of titanyl sulfate, 15-20 parts of citric acid, 5-8 parts of EDTA disodium, 20-27 parts of calcium nitrate, 25-32 parts of potassium dihydrogen phosphate, 8-14 parts of sodium polyaspartate, 3-6 parts of carboxymethyl cellulose, and 250-350 parts of water. According to the silicon-titanium fertilizer and the preparation method thereof, silicon and titanium are chelated step by step, citric acid is firstly chelated with silicon, EDTA is then chelated with titanium, precipitation caused by competitive chelation is avoided, carboxymethyl cellulose and sodium polyaspartate are adopted for compounding a stabilizer, aggregation of a silicon-titanium compound is inhibited, crop metabolism is promoted through cooperation of silicon and titanium, the transportation efficiency of silicon is improved through the titanium element, and the yield of the silicon-titanium fertilizer is increased. The yield-increasing effect is obvious.

Description

Technical Field

[0001] The invention relates to the technical field of water-soluble fertilizers, in particular to a silicon-titanium fertilizer and a preparation method thereof. Background Art

[0002] Silicon and titanium are both beneficial elements for plant growth: silicon strengthens cell walls and improves stress resistance, while titanium promotes photosynthesis and activates enzyme activity. However, existing technologies often use silicon and titanium fertilizers separately. Mixing the two can lead to precipitation due to pH changes or ion competition, reducing their utilization rate.

[0003] Traditional silicon fertilizers (such as sodium silicate) have poor water solubility, while titanium fertilizers (such as titanyl sulfate) easily hydrolyze to form TiO2 precipitates, and there are compatibility issues when the two are compounded. Existing chelation technologies (such as EDTA chelated titanium) are expensive and do not address the technical difficulties of synergistic stabilization of silicon and titanium. Therefore, there is an urgent need to develop a method for preparing a composite fertilizer with simple process, controllable costs, and highly stable silicon and titanium elements. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the present invention provides a silicon-titanium fertilizer and a preparation method thereof.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a silicon-titanium fertilizer, comprising the following raw materials in the following weight proportions: 35-45 parts of potassium silicate, 10-15 parts of titanium oxysulfate, 15-20 parts of citric acid, 5-8 parts of disodium EDTA, 20-27 parts of calcium nitrate, 25-32 parts of potassium dihydrogen phosphate, 8-14 parts of sodium polyaspartate, 3-6 parts of carboxymethyl cellulose, and 250-350 parts of water.

[0008] As a preferred embodiment of the present invention, the raw materials are included in the following weight ratios: 35 parts of potassium silicate, 10 parts of titanium oxysulfate, 15 parts of citric acid, 5 parts of disodium EDTA, 20 parts of calcium nitrate, 25 parts of potassium dihydrogen phosphate, 8 parts of sodium polyaspartate, 3 parts of carboxymethyl cellulose, and 250 parts of water.

[0009] As a preferred embodiment of the present invention, the raw materials are included in the following weight ratios: 37 parts of potassium silicate, 12 parts of titanium oxysulfate, 16 parts of citric acid, 7 parts of disodium EDTA, 22 parts of calcium nitrate, 27 parts of potassium dihydrogen phosphate, 10 parts of sodium polyaspartate, 4 parts of carboxymethyl cellulose, and 270 parts of water.

[0010] As a preferred embodiment of the present invention, the raw materials are included in the following weight ratios: 39 parts of potassium silicate, 14 parts of titanium oxysulfate, 18 parts of citric acid, 7 parts of disodium EDTA, 24 parts of calcium nitrate, 28 parts of potassium dihydrogen phosphate, 11 parts of sodium polyaspartate, 5 parts of carboxymethyl cellulose, and 290 parts of water.

[0011] As a preferred embodiment of the present invention, the raw materials are included in the following weight ratios: 41 parts of potassium silicate, 14 parts of titanium oxysulfate, 17 parts of citric acid, 6 parts of disodium EDTA, 26 parts of calcium nitrate, 27 parts of potassium dihydrogen phosphate, 12 parts of sodium polyaspartate, 4 parts of carboxymethyl cellulose, and 300 parts of water.

[0012] As a preferred embodiment of the present invention, the raw materials are included in the following weight ratios: 44 parts of potassium silicate, 14 parts of titanium oxysulfate, 18 parts of citric acid, 8 parts of disodium EDTA, 26 parts of calcium nitrate, 30 parts of potassium dihydrogen phosphate, 13 parts of sodium polyaspartate, 6 parts of carboxymethyl cellulose, and 330 parts of water.

[0013] As a preferred embodiment of the present invention, the raw materials are included in the following weight ratios: 45 parts of potassium silicate, 15 parts of titanium oxysulfate, 20 parts of citric acid, 8 parts of disodium EDTA, 227 parts of calcium nitrate, 32 parts of potassium dihydrogen phosphate, 14 parts of sodium polyaspartate, 6 parts of carboxymethyl cellulose, and 350 parts of water.

[0014] A method for preparing silicon-titanium fertilizer comprises the following steps:

[0015] S1, potassium silicate and citric acid reacted at 70°C for 50 minutes, wherein the pH value was 4.8;

[0016] S2, adding titanyl sulfate and disodium EDTA, reacting at 60°C for 30 minutes;

[0017] S3, dissolving calcium nitrate and potassium dihydrogen phosphate;

[0018] S4. Add stabilizer, adjust pH to 6.2, and filter to obtain the finished product.

[0019] (3) Beneficial effects

[0020] Compared with the prior art, the present invention provides a silicon-titanium fertilizer and a preparation method thereof, which has the following beneficial effects:

[0021] The silicon-titanium fertilizer and preparation method thereof chelate silicon and titanium in steps, first chelating silicon with citric acid and then chelating titanium with EDTA to avoid precipitation caused by competitive chelation. By using carboxymethyl cellulose and sodium polyaspartate as a compound stabilizer, aggregation of the silicon-titanium complex is inhibited. Silicon and titanium synergistically promote crop metabolism, and the titanium element improves the transportation efficiency of silicon, resulting in a significant yield-increasing effect. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] The present invention provides a technical solution: a silicon-titanium fertilizer, comprising the following raw materials in proportion by weight: 35-45 parts of potassium silicate, 10-15 parts of titanium oxysulfate, 15-20 parts of citric acid, 5-8 parts of disodium EDTA, 20-27 parts of calcium nitrate, 25-32 parts of potassium dihydrogen phosphate, 8-14 parts of sodium polyaspartate, 3-6 parts of carboxymethyl cellulose, and 250-350 parts of water.

[0024] A method for preparing silicon-titanium fertilizer comprises the following steps:

[0025] S1, potassium silicate and citric acid react at 70℃ for 50 minutes;

[0026] S2, adding titanyl sulfate and disodium EDTA, reacting at 60°C for 30 minutes;

[0027] S3, dissolving calcium nitrate and potassium dihydrogen phosphate;

[0028] S4. Add stabilizer, adjust pH to 6.2, and filter to obtain the finished product.

[0029] Example 1:

[0030] A silicon-titanium fertilizer comprises the following raw materials in proportion by weight: 35 parts of potassium silicate, 10 parts of titanyl sulfate, 15 parts of citric acid, 5 parts of disodium EDTA, 20 parts of calcium nitrate, 25 parts of potassium dihydrogen phosphate, 8 parts of sodium polyaspartate, 3 parts of carboxymethyl cellulose, and 250 parts of water.

[0031] A method for preparing silicon-titanium fertilizer comprises the following steps:

[0032] S1, potassium silicate and citric acid were reacted at 70°C for 50 min (pH 4.8);

[0033] S2, adding titanyl sulfate and disodium EDTA, reacting at 60°C for 30 minutes;

[0034] S3, dissolving calcium nitrate and potassium dihydrogen phosphate;

[0035] S4. Add stabilizer, adjust pH to 6.2, and filter to obtain the finished product.

[0036] Example 2:

[0037] A silicon-titanium fertilizer comprises the following raw materials in proportion by weight: 37 parts of potassium silicate, 12 parts of titanyl sulfate, 16 parts of citric acid, 7 parts of disodium EDTA, 22 parts of calcium nitrate, 27 parts of potassium dihydrogen phosphate, 10 parts of sodium polyaspartate, 4 parts of carboxymethyl cellulose, and 270 parts of water.

[0038] A method for preparing silicon-titanium fertilizer comprises the following steps:

[0039] S1, potassium silicate and citric acid react at 70℃ for 50 minutes;

[0040] S2, adding titanyl sulfate and disodium EDTA, reacting at 60°C for 30 minutes;

[0041] S3, dissolving calcium nitrate and potassium dihydrogen phosphate;

[0042] S4. Add stabilizer, adjust pH to 6.2, and filter to obtain the finished product.

[0043] Example 3:

[0044] A silicon-titanium fertilizer comprises the following raw materials in proportion by weight: 39 parts of potassium silicate, 14 parts of titanyl sulfate, 18 parts of citric acid, 7 parts of disodium EDTA, 24 parts of calcium nitrate, 28 parts of potassium dihydrogen phosphate, 11 parts of sodium polyaspartate, 5 parts of carboxymethyl cellulose, and 290 parts of water.

[0045] A method for preparing silicon-titanium fertilizer comprises the following steps:

[0046] S1, potassium silicate and citric acid react at 70℃ for 50 minutes;

[0047] S2, adding titanyl sulfate and disodium EDTA, reacting at 60°C for 30 minutes;

[0048] S3, dissolving calcium nitrate and potassium dihydrogen phosphate;

[0049] S4. Add stabilizer, adjust pH to 6.2, and filter to obtain the finished product.

[0050] Example 4:

[0051] A silicon-titanium fertilizer comprises the following raw materials in the following proportions by weight: 41 parts of potassium silicate, 14 parts of titanyl sulfate, 17 parts of citric acid, 6 parts of disodium EDTA, 26 parts of calcium nitrate, 27 parts of potassium dihydrogen phosphate, 12 parts of sodium polyaspartate, 4 parts of carboxymethyl cellulose, and 300 parts of water.

[0052] A method for preparing silicon-titanium fertilizer comprises the following steps:

[0053] S1, potassium silicate and citric acid react at 70℃ for 50 minutes;

[0054] S2, adding titanyl sulfate and disodium EDTA, reacting at 60°C for 30 minutes;

[0055] S3, dissolving calcium nitrate and potassium dihydrogen phosphate;

[0056] S4. Add stabilizer, adjust pH to 6.2, and filter to obtain the finished product.

[0057] Embodiment 5:

[0058] A silicon-titanium fertilizer comprises the following raw materials in proportion by weight: 44 parts of potassium silicate, 14 parts of titanyl sulfate, 18 parts of citric acid, 8 parts of disodium EDTA, 26 parts of calcium nitrate, 30 parts of potassium dihydrogen phosphate, 13 parts of sodium polyaspartate, 6 parts of carboxymethyl cellulose, and 330 parts of water.

[0059] A method for preparing silicon-titanium fertilizer comprises the following steps:

[0060] S1, potassium silicate and citric acid react at 70℃ for 50 minutes;

[0061] S2, adding titanyl sulfate and disodium EDTA, reacting at 60°C for 30 minutes;

[0062] S3, dissolving calcium nitrate and potassium dihydrogen phosphate;

[0063] S4. Add stabilizer, adjust pH to 6.2, and filter to obtain the finished product.

[0064] Example 6:

[0065] A silicon-titanium fertilizer comprises the following raw materials in proportion by weight: 44 parts of potassium silicate, 14 parts of titanyl sulfate, 18 parts of citric acid, 8 parts of disodium EDTA, 26 parts of calcium nitrate, 30 parts of potassium dihydrogen phosphate, 13 parts of sodium polyaspartate, 6 parts of carboxymethyl cellulose, and 330 parts of water.

[0066] A method for preparing silicon-titanium fertilizer comprises the following steps:

[0067] S1, potassium silicate and citric acid react at 70℃ for 50 minutes;

[0068] S2, adding titanyl sulfate and disodium EDTA, reacting at 60°C for 30 minutes;

[0069] S3, dissolving calcium nitrate and potassium dihydrogen phosphate;

[0070] S4. Add stabilizer, adjust pH to 6.2, and filter to obtain the finished product.

[0071] By chelating silicon and titanium in steps, first chelating silicon with citric acid and then chelating titanium with EDTA, precipitation caused by competitive chelation is avoided. By using carboxymethyl cellulose and sodium polyaspartate as a compound stabilizer, the aggregation of silicon-titanium complexes is inhibited. Silicon and titanium synergistically promote crop metabolism, and the titanium element improves the transport efficiency of silicon, resulting in a significant yield increase.

[0072] The silicon and titanium chelation rates of the present invention are both greater than 95%, and the long-term storage is stable; the absorption efficiency of crops for silicon and titanium is increased by more than 30%, and disease resistance and yield are significantly enhanced; the process conditions are mild and suitable for industrial production.

[0073] Test results:

[0074] Silicon content 7.5% (w / w), titanium content 1.2% (w / w), solubility > 98%;

[0075] There is no precipitation after 12 months of storage at room temperature. Compared with elemental silicon / titanium fertilizer, the rice absorption rate is increased by 40%-50%, the yield is increased by 15%-22%, and the heavy metal cadmium content in rice is reduced by 20%-35%.

[0076] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A silicon-titanium fertilizer, characterized in that: The invention comprises the following raw materials in proportion by weight: 35-45 parts of potassium silicate, 10-15 parts of titanium oxysulfate, 15-20 parts of citric acid, 5-8 parts of disodium EDTA, 20-27 parts of calcium nitrate, 25-32 parts of potassium dihydrogen phosphate, 8-14 parts of sodium polyaspartate, 3-6 parts of carboxymethyl cellulose and 250-350 parts of water.

2. A silicon-titanium fertilizer according to claim 1, characterized in that: The invention comprises the following raw materials in proportion by weight: 35 parts of potassium silicate, 10 parts of titanium oxysulfate, 15 parts of citric acid, 5 parts of disodium EDTA, 20 parts of calcium nitrate, 25 parts of potassium dihydrogen phosphate, 8 parts of sodium polyaspartate, 3 parts of carboxymethyl cellulose and 250 parts of water.

3. A silicon-titanium fertilizer according to claim 1, characterized in that: The invention comprises the following raw materials in proportion by weight: 37 parts of potassium silicate, 12 parts of titanium oxysulfate, 16 parts of citric acid, 7 parts of disodium EDTA, 22 parts of calcium nitrate, 27 parts of potassium dihydrogen phosphate, 10 parts of sodium polyaspartate, 4 parts of carboxymethyl cellulose and 270 parts of water.

4. A silicon-titanium fertilizer according to claim 1, characterized in that: The invention comprises the following raw materials in proportion by weight: 39 parts of potassium silicate, 14 parts of titanium oxysulfate, 18 parts of citric acid, 7 parts of disodium EDTA, 24 parts of calcium nitrate, 28 parts of potassium dihydrogen phosphate, 11 parts of sodium polyaspartate, 5 parts of carboxymethyl cellulose and 290 parts of water.

5. The silicon-titanium fertilizer according to claim 1, characterized in that: The invention comprises the following raw materials in proportion by weight: 41 parts of potassium silicate, 14 parts of titanium oxysulfate, 17 parts of citric acid, 6 parts of disodium EDTA, 26 parts of calcium nitrate, 27 parts of potassium dihydrogen phosphate, 12 parts of sodium polyaspartate, 4 parts of carboxymethyl cellulose and 300 parts of water.

6. The silicon-titanium fertilizer according to claim 1, characterized in that: The invention comprises the following raw materials in proportion by weight: 44 parts of potassium silicate, 14 parts of titanium oxysulfate, 18 parts of citric acid, 8 parts of disodium EDTA, 26 parts of calcium nitrate, 30 parts of potassium dihydrogen phosphate, 13 parts of sodium polyaspartate, 6 parts of carboxymethyl cellulose and 330 parts of water.

7. The silicon-titanium fertilizer according to claim 1, characterized in that: The invention comprises the following raw materials in proportion by weight: 45 parts of potassium silicate, 15 parts of titanium oxysulfate, 20 parts of citric acid, 8 parts of disodium EDTA, 227 parts of calcium nitrate, 32 parts of potassium dihydrogen phosphate, 14 parts of sodium polyaspartate, 6 parts of carboxymethyl cellulose and 350 parts of water.

8. A method for preparing silicon-titanium fertilizer according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, potassium silicate and citric acid react at 70℃ for 50 minutes; S2, adding titanyl sulfate and disodium EDTA, reacting at 60°C for 30 minutes; S3, dissolving calcium nitrate and potassium dihydrogen phosphate; S4. Add stabilizer, adjust pH to 6.2, and filter to obtain the finished product.