Method for preparing potassium fulvate phosphate fertilizer containing organic titanium by recrystallization process

Abstract

The invention relates to a method for preparing potassium fulvate phosphate fertilizer containing organic titanium by a recrystallization process. The method is characterized by comprising the following steps of: neutralizing titanium salt ice water solution with a base to prepare a new precipitate metatitanic acid; replacing titanium chloride or sulfate with new precipitate metatitanic acid to be used as a raw material for synthesizing titanium citrate free of chloride or sulfate; synthesizing titanium citrate saturated solution with new precipitate metatitanic acid as a titanium source and citric acid as an acid solvent and chelating agent by a microwave hot-melt chelating process; and mixing dipotassium hydrogen phosphate containing crystal water with potassium fulvate according to a ratio, co-melting at the temperature not less than 40 DEG C to obtain potassium fulvate and potassium phosphate complex, maintaining the temperature of the potassium fulvate and potassium phosphate complex at the temperature of not less than 40 DEG C, adding titanium citric acid solution according to a ratio, uniformly mixing and cooling for recrystallization. According to the invention, aiming at the problem of low utilization rate of phosphate fertilizer, a humic acid phosphate fertilizer synergist and organic titanium for strongly promoting plants to absorb and transfer phosphorus element are integrated so as to form a double-effect phosphate fertilizer synergist.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, and in particular relates to a method for preparing organic titanium-containing potassium phosphate fertilizer by using a recrystallization process. Background technique [0002] Phosphorus is an essential nutrient element for plant growth. In agricultural production, phosphorus fertilizer is the second largest type of fertilizer. 74% of the cultivated land in my country is deficient in phosphorus. The application of phosphorus fertilizer has become an essential measure to ensure crop yield increase. [0003] According to the comprehensive scientific and technological level of my country's current agriculture, the utilization rate of fertilization of agricultural crops in my country is only about 30%, while the seasonal utilization rate of phosphorus fertilizer in my country is only 10% to 20%, resulting in a large amount of fertilizer loss and waste and environmental pollution. [0004] How ...

AI Technical Summary

Problems solved by technology

[0029] Above patent document discloses directly the chloride of water-soluble titanium, or the sulfate salt of titanium as the raw material of synthetic organic titanium citric acid chelate compound, the weak point of its existence is that in the organic titanium citric acid chelate synthesized Miscellaneous with a large number of chloride ions or sulfide ions

[0033] There is no report on the compounding of organic titanium and fulvic acid as a synergist for phosphate fertilizer