Method for preparing boron fertilizer
AssigneeWuhan Fishery Agricultural Science and Technology Co., Ltd.
InventorLin Gan
Life of this patent
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Abstract
A method for preparing a boron fertilizer, including: (1) heating boric acid to a temperature of 180-200° C., maintaining the temperature for 20-30 min for dehydration of the boric acid to yield pyroboric acid; and (2) cooling down the pyroboric acid to a temperature of 40-60° C., crushing, and screening to yield a powdered, weakly acidic, high-content boron fertilizer. The method is energy-saving, environmentally friendly, and low in cost. The resulting boron fertilizer is weakly acidic, fast in dissolution rate, and has excellent in compounding performance
Claims14
A method for preparing a boron fertilizer, the method comprising the following steps:
- a) heating boric acid to a temperature of less than 200° C. and not less than 180° C., maintaining the temperature for 20-30 min for dehydration of the boric acid to yield pyroboric acid;
- and
- b) cooling down the pyroboric acid to a temperature of 40-60° C., crushing, and screening to yield the boron fertilizer, wherein the boron fertilizer has a pure boron content of between 22.5% and 23.5%.
A method for preparing a boron fertilizer, the method comprising:
- a) heating boric acid to a temperature of 200° C., maintaining the temperature for 20-30 min to yield pyroboric acid;
- and
- b) cooling down the pyroboric acid to a temperature of 40-60° C., crushing it, and screening it to yield the boron fertilizer, wherein the boron fertilizer has a pure boron content of 23.6%.
A method for preparing a boron fertilizer, the method comprising:
- a) heating boric acid to a temperature of 180° C., maintaining the temperature for 20-30 min to yield pyroboric acid;
- and
- b) cooling down the pyroboric acid to a temperature of 40-60° C., crushing it, and screening it to yield the boron fertilizer, wherein the boron fertilizer has a pure boron content of 22.7%.
A method for preparing a powdered weak acidic boron fertilizer, the method comprising:
- a) heating boric acid to a temperature of 190° C., maintaining the temperature for 20-30 min to yield pyroboric acid;
- and
- b) cooling down the pyroboric acid to a temperature of 40-60° C., crushing, and screening to yield the boron fertilizer, wherein the boron fertilizer has a pure boron content of 23.1%
A method for preparing a boron fertilizer, the method comprising:
- a) heating boric acid to a temperature of 180-190° C., maintaining the temperature for 20-30 min to yield pyroboric acid;
- and
- b) cooling down the pyroboric acid to a temperature of 40-60° C., crushing, and screening to yield the boron fertilizer, wherein the boron fertilizer has a pure boron content of 22.7-23.1%.
Dependencies are inferred from the claim text.