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Method for preparing rice salt-tolerant special small molecular organic substance by using modification of papermaking black liquid

A technology for papermaking black liquor and organic matter, which is applied in the fields of botanical equipment and methods, chemicals for biological control, rice cultivation, etc., can solve the problems of lack of application, not increasing the content of nitrogen-containing functional groups, etc., and achieves simple processing technology. , The extraction cost is low, and the effect of accelerating root elongation

Active Publication Date: 2019-11-12
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent application number is 201610847821.8, and the patent name is a method for efficiently extracting fulvic acids from papermaking black liquor. Although it is disclosed that the molecular weight of organic matter in papermaking black liquor is reduced by means of oxidant oxidation and the content of carboxyl functional groups is increased. The method does not increase the content of phenolic hydroxyl groups and other growth-promoting nitrogen-containing functional groups related to stress tolerance, and it also lacks application in rice salt tolerance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: the preparation of small molecule organic matter

[0037]The method comprises the following steps: (1) Extraction and purification of organic matter in papermaking black liquor: concentrate the mass fraction of papermaking black liquor to 60%, adjust pH=2, centrifuge at 8000rpm for 20min, remove precipitate to obtain crude organic matter; The crude organic matter is pumped into the AmberliteXAD-8 resin column, and the injection speed is controlled at 5ml / min; after the injection, the deionized water with 4 times the volume of the resin is passed through the column to remove salts; The substances in the resin column are eluted; the eluted solution is passed through a hydrogen-saturated cation exchange resin to remove the metal cations, and the purified organic solution is obtained; the purified organic solution is adjusted to pH 7, and then passed through a 10kDa The filter membrane separates the purified organic matter solution into small molecular weight ...

Embodiment 2

[0042] Embodiment 2: Preparation of small molecule organic matter

[0043] The method comprises the following steps: (1) Extraction and purification of organic matter in papermaking black liquor: concentrate the mass fraction of papermaking black liquor to 60%, adjust pH=2, centrifuge at 8000rpm for 20min, remove precipitate to obtain crude organic matter; The crude organic matter is pumped into the AmberliteXAD-8 resin column, and the injection speed is controlled at 5ml / min; after the injection, the deionized water with 4 times the volume of the resin is passed through the column to remove salts; The substances in the resin column are eluted; the eluted solution is passed through a hydrogen-saturated cation exchange resin to remove the metal cations, and the purified organic solution is obtained; the purified organic solution is adjusted to pH 7, and then passed through a 10kDa The filter membrane separates the purified organic matter solution into small molecular weight org...

Embodiment 3

[0048] Embodiment 3: the preparation of small molecule organic matter

[0049] The method comprises the following steps: (1) Extraction and purification of organic matter in papermaking black liquor: concentrate the mass fraction of papermaking black liquor to 60%, adjust pH=2, centrifuge at 8000rpm for 20min, remove precipitate to obtain crude organic matter; The crude organic matter is pumped into the AmberliteXAD-8 resin column, and the injection speed is controlled at 5ml / min; after the injection, the deionized water with 4 times the volume of the resin is passed through the column to remove salts; The substances in the resin column are eluted; the eluted solution is passed through a hydrogen-saturated cation exchange resin to remove the metal cations, and the purified organic solution is obtained; the purified organic solution is adjusted to pH 7, and then passed through a 10kDa The filter membrane separates the purified organic matter solution into small molecular weight...

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Abstract

The present invention discloses a method for preparing a rice salt-tolerant special small molecule organic substance by using papermaking black liquid. The method comprises the following steps: (1) extracting and purifying organic substances in papermaking black liquid and separating the purified organic substances to obtain large molecular weight organic substances and small molecular weight organic substances; (2) modifying the small molecular weight organic substances and grafting reactive functional groups to obtain a first salt-tolerant small molecule organic substance; and (3) modifyingthe large molecular weight organic substances to lower molecular weight and increasing a phenolic hydroxyl group content to obtain a second salt-tolerant salt small molecule organic substance. The rice salt-tolerant special small molecule organic substance can soak seeds before direct seed sowing to improve a germination rate and rooting ability of the seeds, also can be used for seedling irrigation before rice seedling transplant to promote growth of rice roots and salt tolerance of seedlings, and can also be mixed with a fertilizer to be applied into soil together to achieve an effect of increasing production.

Description

technical field [0001] The invention relates to the technical field of resource reuse, in particular to a method for modifying and preparing small-molecule organic compounds special for rice salt tolerance by using papermaking black liquor. Background technique [0002] Papermaking black liquor is an environmental pollutant rich in organic matter produced in the papermaking process. Traditional papermaking black liquor treatment methods such as physics, chemistry, electrochemistry, and microbial fermentation will not only waste resources, but also easily cause secondary pollution. Research has found that 50-60% of the organic substances in papermaking black liquor have similar spectral properties to natural fulvic acid. If the organic substances in papermaking black liquor are recycled, it will not only help reduce waste of resources, but also reduce emissions The pollution caused to the environment in the process has important practical significance for maintaining the sust...

Claims

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Application Information

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IPC IPC(8): C12P1/00A01G22/22A01N61/00A01P21/00
CPCA01N61/00A01G22/22C12P1/00
Inventor 杨越超姚媛媛王晓琪申天琳
Owner SHANDONG AGRICULTURAL UNIVERSITY
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