Lignin fertilizer and preparation method and application
A technology of lignin and fertilizer, applied in the application, organic fertilizer, inorganic fertilizer and other directions, can solve the problems of cumbersome preparation process, unfavorable operation, environmental pollution, etc., and achieve the effects of good water solubility, small molecular weight and low price
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Embodiment 1
[0048] A lignin fertilizer and a preparation method thereof, the steps are as follows:
[0049] (1) Add 2Kg of wheat straw powder into 20kg of water, and stir at room temperature to obtain an aqueous solution of straw powder;
[0050] (2) 0.8Kg potassium sulfite, 0.04Kg urea, 1g anthraquinone, and 3g copper nitrate are stirred into the straw powder aqueous solution described in step (1) successively;
[0051] (3) Seal the high-pressure reaction device, heat up to 160° C., stir for 3 hours, cool down, remove solids by filtration, and obtain a lignin fertilizer solution with a lignin content of 1.98%. The molecular weight of lignin in lignin fertilizer is 3800.
Embodiment 2
[0053] A lignin fertilizer and a preparation method thereof, the steps are as follows:
[0054] (1) Add 3Kg of corn stalk powder into 20kg of water, and stir at room temperature to obtain an aqueous solution of straw powder;
[0055] (2) 0.8Kg ammonium sulfite, 0.18Kg urea, 9g anthraquinone, 30g copper sulfate are added to the straw powder aqueous solution described in step (1) successively while stirring;
[0056] (3) Seal the high-pressure reaction device, heat up to 150° C., stir for 5 hours, cool down, remove solids by filtration, and obtain a lignin fertilizer solution with a lignin content of 2.13%. The molecular weight of lignin in lignin fertilizer is 3000.
Embodiment 3
[0058] A lignin fertilizer and a preparation method thereof, the steps are as follows:
[0059] (1) Add 2Kg of rice straw powder and 2Kg of cotton straw powder into 20kg of water, and stir at room temperature to obtain an aqueous solution of straw powder;
[0060] (2) 1.5Kg potassium bisulfite, 0.6Kg ammonia water, 30g anthraquinone, and 100g cupric chloride are stirred into the straw powder aqueous solution described in step (1) successively;
[0061] (3) Seal the high-pressure reaction device, heat up to 130° C., stir for 7 hours, cool down, remove solids by filtration, and obtain a lignin fertilizer solution with a lignin content of 2.91%. The molecular weight of lignin in lignin fertilizer is 2500.
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