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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

Inactive Publication Date: 2018-04-20
KINGENTA ECOLOGICAL ENG GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Chinese patent document CN102603927A discloses a method for preparing lignin and hemicellulose from wheat straw, but the method uses a high-boiling organic solvent, which is easy to cause environmental pollution, and the preparation process is cumbersome, which is not conducive to operation

Method used

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  • Lignin fertilizer and preparation method and application
  • Lignin fertilizer and preparation method and application
  • Lignin fertilizer and preparation method and application

Examples

Experimental program
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Effect test

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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Abstract

The invention relates to a lignin fertilizer and a preparation method and application. The lignin fertilizer takes straw as a raw material, and straw together with sulfite, a buffering agent, anthraquinone and copper salt undergoes a one-step reaction to prepare a liquid fertilizer. The content of lignin is 1.5-3.5% according to a mass ratio, and the weight average molecular weight of lignin is 2000-5000. The invention further provides a preparation method and application of the lignin fertilizer. Lignin in plant straw is fully applied at a high value. The lignin is small in molecular weight,high in sulfonation rate, good in sulfonation and beneficial for crop absorption. The preparation step is simplified, and the lignin fertilizer is obtained through a one-step charging reaction.

Description

technical field [0001] The invention relates to a lignin fertilizer and its preparation method and application, and belongs to the technical field of high-value utilization of plant straws. Background technique [0002] Cellulose and lignin widely exist in plant straws, which are the most abundant organic renewable resources in the world. As a large agricultural country, China is very rich in straw resources, with 600-800 million tons. There are huge nutrient resources in the straw, and nearly half of the nutrients absorbed by the crops will remain in the straw. However, straw as a resource has not been fully and rationally utilized for a long time, and a large amount of straw was discarded and burned, which not only caused a waste of resources, but also polluted the environment. [0003] The development and utilization of plant straw resources not only involves the efficient transformation of materials and efficient energy circulation in the agricultural production system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05C3/00C05C5/00C05G5/20C05C9/00C05D1/00C05F11/00C05G3/00C05D9/02
Inventor 尤龙郑树林胡兆平高建仁陈德清张强
Owner KINGENTA ECOLOGICAL ENG GRP
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