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Preparation method of water-soluble organic carbon fertilizer

An organic carbon, water-soluble technology, applied in organic fertilizers, liquid fertilizers, fertilizer mixtures, etc., can solve the problems of catalysts that cannot be recycled and reused, unsuitable, and equipment is highly corrosive.

Active Publication Date: 2018-07-27
上海永通生态工程股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are obvious defects in the preparation process of inorganic strong acid, such as the catalyst cannot be recycled and reused, the equipment is highly corrosive, and a large amount of acid-containing and salt-containing wastewater is produced.
In addition, although there is a preparation process using non-liquid inorganic strong acid in the prior art, which avoids the defect of liquid acid, the catalytic system of this preparation process still requires liquid acid, and it is not suitable for aqueous solution systems or systems with water generation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The invention provides a kind of preparation method of water-soluble organic carbon fertilizer,

[0036] The method is applicable to an aqueous solution system and uses a solid acid as a catalyst to prepare a water-soluble organic carbon fertilizer, which is more efficient and environmentally friendly.

[0037] In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

[0038] (1) Prepare the liquid to be reacted: sort the agricultural wastes to remove impurities, crush them to below 10 mesh, add water and stir to obtain the liquid to be reacted with a solid concentration of 50%-55%.

[0039] (2) The temperature is raised to reflux of the reaction solution (105°C-120°C), and a solid acid catalyst is added to carry out the hydrolysis reaction.

[0040] (3) After heating to reflux for a certain period of time, centrifuge or settle to separate, and take out the supernatant.

[0041] (4) Evaporating...

Embodiment 1

[0054] (1) Prepare the liquid to be reacted: sort the agricultural wastes to remove impurities, crush them to below 10 mesh, weigh 500 kg and add 499 kg of deionized water to stir to obtain a liquid to be reacted with a solid concentration of about 50%.

[0055] (2) Utilize the organic acid acetic acid to adjust the pH value of the reaction liquid system to 5.0, heat up to 120° C. and reflux the reaction liquid, add perfluorosulfonic acid resin (H 0 =-12, particle size is 15 mesh) 1 kg of catalyst for the first step of digestion reaction, wherein, waste: solid acid = 100:0.20 (mass ratio).

[0056] (3) After heating to reflux for 120 minutes, centrifuge or settle to separate, and take the supernatant.

[0057] (4) Evaporating and concentrating the supernatant to obtain an organic carbon concentrate.

[0058] (5) Naturally cool the room to normal temperature to obtain the finished product.

[0059] After the solid part (containing raw materials and catalysts that can continue...

Embodiment 2

[0062] (1) Prepare the liquid to be reacted: sort the agricultural wastes to remove impurities, crush them to below 10 mesh, weigh 530 kg and add 467.5 kg of deionized water to stir to obtain a liquid to be reacted with a solid concentration of about 53%.

[0063] (2) Utilize organic acid to adjust the pH value of the malonate reaction solution system to 4.5, heat up to 110°C for reaction solution reflux, add perfluorosulfonic acid resin (H 0 =-12, particle size is 15 mesh) 2.5 kg of catalyst for the first step of digestion reaction, wherein, waste: solid acid = 100:0.47 (mass ratio).

[0064] (3) After heating to reflux for 90 minutes, centrifuge or settle to separate, and take the supernatant.

[0065] (4) Evaporating and concentrating the supernatant to obtain an organic carbon concentrate.

[0066] (5) Naturally cool the room to normal temperature to obtain the finished product.

[0067] Recover the solid acid catalyst, add a certain amount of fresh raw materials to the ...

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Abstract

The invention provides a method for producing a water-soluble organic carbon fertilizer from agricultural wastes. The method comprises the following steps of a, reaction liquid preparation: dispersingorganic agricultural wastes into water to obtain reaction liquid; b, hydrolysis reaction: performing hydrolysis reaction on the reaction liquid and a solid acid catalyst to obtain a hydrolysis product; c, separation: separating the hydrolysis product to obtain a clear liquid part; obtaining a water solution containing the water-soluble organic carbon fertilizer; d, concentrating the water solution to obtain the water-soluble organic carbon fertilizer. The method is applicable to a water solution system; a catalytic system only uses solid acid as a catalyst; the preparation method belongs to an efficient and environment-friendly method for preparing the water-soluble organic carbon fertilizer.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a method for preparing water-soluble organic carbon-based fertilizers by using organic wastes as raw materials. Background technique [0002] The theory of plant nutrition points out that carbon is a large element in plant nutrition, and the average content of carbon in plants is about 45%, far exceeding other large, medium and trace elements. However, in the case of a substantial increase in the amount of nitrogen, phosphorus and potassium fertilization, the supplement of carbon was not considered, which made the "carbon short board" more acute, and the actual effect of balanced fertilization was greatly reduced. If "carbon starvation" can be eliminated by adjusting and optimizing the balance of plant nutrition through fertilization and carbon replenishment, it can be expected that the yield increase potential of the existing balanced fertilization will be further improved. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F11/00
CPCC05F11/00C05G5/20
Inventor 石称华钱志红连晓敏
Owner 上海永通生态工程股份有限公司