Method for preparing organic titanium-humate urea by microwave hot melting process

Abstract

The invention relates to a method for preparing organic titanium-humate urea by a microwave hot melting process. The method is characterized in that: new metatitanic acid precipitate of citric acid is prepared by neutralizing an iced solution of titanium salt by using alkali; the new metatitanic acid precipitate instead of titanium chloride and sulfate is used as raw materials for synthesizing citricacide-titatnium chelate; the citricacide-titatnium chelate is synthesized by a microwave hot melting chelation process by using the new metatitanic acid precipitate as a titanium source and citricacid as an acid solvent and chelant; citricacide-titatnium chelate-ammonium citrate compound salt is prepared by neutralizing a saturated solution of citricacide-titatnium chelate by using ammonium carbonate powder and salting out; organic titanium-humate ammonium salt compound salt is prepared by performing hot melting chelation on the citricacide-titatnium chelate-ammonium citrate compound saltand humate ammonium salt in a ratio under microwaves; and the humate urea compound fertilizer containing organic titanium is prepared by the steps of mixing urea and the citricacide-titatnium chelate-humate ammonium salt compound salt in a ratio, and performing hot melting chelation on a mixture under microwaves. The efficient and sustained-release humate urea containing titanium is obtained.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, and in particular relates to a method for manufacturing a mixed fertilizer made of organic titanium and fulvic acid urea. Background technique [0002] Fertilizer is a strategic material to ensure national food security, and the material basis for maintaining and improving soil fertility to achieve sustainable agricultural development. [0003] The total production and consumption of urea in my country rank first in the world. Nitrogen fertilizers account for 50% of the total amount of chemical fertilizers used in my country, and urea accounts for more than 70% of nitrogen fertilizers. Urea is a very important "domestic fertilizer" in our country, and it is a strategic material that affects our country's food security. [0004] Urea is a high-nitrogen chemical fertilizer. When urea is directly applied alone, due to the action of urease and nitrifying bacteria in the soil, nitrogen decomposi...

AI Technical Summary

Problems solved by technology

[0022] 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 synthetic organic titanium citric acid chelate compound Miscellaneous with a large number of chloride ions or sulfide ions

[0034] We have not found reports on the use of organotitanium-fulvate as a complexing synergist for urea, nor have we found reports on fulvic acid urea products containing organic titanium