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Humic acid-containing water-soluble fertilizer and preparation method thereof

A water-soluble fertilizer and humic acid technology, applied in the direction of organic fertilizers, fertilizer mixtures, fertilization devices, etc., can solve the problems of poor sulfonation effect, low cost, high sulfonation rate, etc.

Active Publication Date: 2020-05-08
ZHEJIANG FENGYU ECOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the water solubility of humic acid, thereby improving the application effect and convenience, it can be modified by sulfonation. The sulfonating agents used mainly include sulfuric acid, sulfur trioxide, sulfur dioxide, sulfite, etc.; sulfuric acid sulfonation High efficiency and low cost, but there are defects in wastewater treatment and subsequent alkalization process; sulfur trioxide, sulfur dioxide treatment raw materials and equipment components are relatively high; sulfite method reaction conditions are warm but the sulfonation effect is not good, currently less used

Method used

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  • Humic acid-containing water-soluble fertilizer and preparation method thereof
  • Humic acid-containing water-soluble fertilizer and preparation method thereof
  • Humic acid-containing water-soluble fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 basic performance detection method

[0030] Determination of sulfonation degree:

[0031] Weigh with an analytical balance and heat to dissolve to accurately prepare 0.001M CTAB solution;

[0032] Weigh 0.2g of sulfonated humic acid sample, add it into 500mL of distilled water to swell for 12 hours, then dilute to 1L;

[0033] Take 10mL sulfonated humic acid sample solution and add 30mL distilled water to dilute, and titrate with 0.001M CTAB solution;

[0034] During the titration, the conductivity was measured with a conductivity meter until the conductivity vs. CTAB solution volume curve showed an obvious turning point and terminated;

[0035] Calculate the sulfonation degree=103CV / m×100%, C is the CTAB concentration (mol / L), V is the volume (L) of the turning point CTAB, and m is the lignite sulfonated humic acid mass (g).

[0036] Surface tension measurement

[0037] Accurately prepare 1% (w / v) humic acid / sulfonated humic acid, and use SITA t-100 su...

Embodiment 2

[0043] The preparation of embodiment 2 lignite humic acid

[0044] Use a crusher to crush the lignite into fine particles below 15 mesh;

[0045] Add the fine particles into 2 times the mass of 2% NaOH aqueous solution, and keep stirring at 60 degrees Celsius for 20 minutes;

[0046] Centrifuge to remove solids and filter, add concentrated HCI to the obtained filtrate with stirring to adjust the pH until a large amount of black precipitates are precipitated;

[0047] The separated precipitate is filtered and dried, and the obtained filter cake is lignite humic acid.

Embodiment 3

[0048] The preparation of embodiment 3 sulfonated lignite humic acid

[0049] Dissolve lignite humic acid in water with 10 times the mass, add 1% mass of H 2 SO 4 and 4% by mass of K 2 SO 3 , reacted for 2 hours at 50 degrees Celsius;

[0050] The solution is dried to obtain the sulfonated lignite humic acid product (1).

[0051] Use 8%H 2 SO 4 Carry out sulfonation under similar conditions to obtain sulfonated lignite humic acid product (2).

[0052] Use 5%K 2 SO 3 Carry out sulfonation under similar conditions to obtain sulfonated lignite humic acid product (3).

[0053] Use 3%H 2 SO 4 and 3%K 2 SO 3 Carry out sulfonation under similar conditions to obtain sulfonated lignite humic acid product (4).

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Abstract

The invention belongs to the field of fertilizers. The invention provides humic acid-containing water-soluble fertilizer which comprises sulfonated lignite humic acid, a wetting agent and a disintegrating agent, and the sulfonated lignite humic acid is prepared from sulfuric acid and potassium sulfite sulfonated humic acid.

Description

[0001] field of invention [0002] The invention belongs to the field of fertilizers. Specifically, the invention provides a method for preparing sulfonated lignite humic acid, a sulfonated lignite humic acid product and a corresponding water-soluble fertilizer prepared by the method. Background technique [0003] Humic acid is a kind of complex network polymer, which contains a large number of different functional groups as well as carbon, hydrogen, oxygen, nitrogen, sulfur and other metal elements. Humic acid is mainly formed by the remains of animals and plants in water bodies under the action of geological conditions and microorganisms. There are a large amount of humic acid in peat, weathered coal and lignite. Humic acid can improve soil properties, change soil nutrient composition and increase soil biological activity. It has been widely used in fertilizer preparation, desert greening and barren soil improvement. [0004] In order to improve the water solubility of humi...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/80C08H7/00A01G22/05
CPCA01G22/05C05F11/02C05G3/00C08H6/00
Inventor 陈丰山杨艳陈文建
Owner ZHEJIANG FENGYU ECOLOGICAL TECH CO LTD
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