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Production technology of wet-activated-carbon-based potassium sulfate

A wet-process activated carbon and production technology technology, applied in the directions of alkali metal sulfite/sulfite, potash fertilizer, chemical instruments and methods, etc., can solve the problem of low utilization rate of potash fertilizer, etc. The effect of improving soil structure

Inactive Publication Date: 2016-11-16
赵常然
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, as a water-soluble quick-acting fertilizer, the utilization rate of potassium fertilizer is very low, only 35% to 50%, which is more than ten percentage points lower than the world average level.

Method used

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  • Production technology of wet-activated-carbon-based potassium sulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Crush wheat straw to 80 mesh to obtain 500 g of wheat straw powder, and spray 1000 g of water to moisten it;

[0041] (2) According to step (1) the weight ratio of wheat straw powder and sulfuric acid with a concentration of 93wt% is 1:10, mix the wheat straw powder obtained in step (1) with sulfuric acid, and place it in a microwave oven at 700W, 2450MHz (equivalent to Heat the reaction at about 120°C for 20 minutes, take it out and stir it, then place it in a microwave oven and heat it for 15 minutes to obtain the reactant;

[0042] (3) The reactant obtained in step (2) is subjected to solid-liquid separation to obtain a solid product and a filtrate.

[0043] (4) The solid product obtained in step (3) is neutralized to about pH7 with 30% waste potassium hydroxide.

[0044] (5) Separating the neutralized product in step (4) into a solid product and a filtrate, and the solid product is wet-process activated carbon-based potassium sulfate.

[0045] The filtrate is ...

Embodiment 2

[0049] (1) Crush the bagasse to 100 mesh to obtain 1000g of bagasse powder, and spray 1000g of water for wetting;

[0050] (2) According to step (1), bagasse powder and sulfuric acid with a concentration of 98wt% were mixed in a weight ratio of 1:20, and stirred and reacted at 100°C for 4 hours to obtain a reactant;

[0051] (3) The reactant obtained in step (2) is subjected to solid-liquid separation to obtain a solid product and a filtrate.

[0052] (4) The solid product obtained in step (3) is neutralized to about pH 7.0 with 32% liquid potassium hydroxide.

[0053] (5) Separating the neutralized product in step (4) into a solid product and a filtrate, and the solid product is wet-process activated carbon-based potassium sulfate.

[0054] The filtrate is concentrated to produce industrial grade potassium sulfate.

[0055] The test results are as follows:

[0056] Wet-process activated carbon-based potassium sulfate weight 2823.5g (dry basis 1371.2g), water content 51.44%...

Embodiment 3

[0058] (1) Crush the rice straw to 400 mesh to obtain 100g of rice straw powder, and spray 50g of water to moisten it;

[0059] (2) According to step (1), rice straw powder and sulfuric acid with a concentration of 65wt% were mixed in a weight ratio of 1:100, and reacted at 160°C for 8 hours to obtain a reactant;

[0060] (3) The reactant obtained in step (2) is subjected to solid-liquid separation to obtain a solid product and a filtrate.

[0061] (4) Neutralize the solid product obtained in step (3) to about pH 7.0 with powdery potassium hydroxide.

[0062] (5) The solid finished product neutralized in step (4) is wet-process activated carbon-based potassium sulfate.

[0063] The test results are as follows:

[0064] Wet-process activated carbon-based potassium sulfate weight 643.7g (dry basis 487.8g), water content 24.22%, pH 6.9, activated carbon content 10.66%, iodine value 83, methylene blue 1.1ml, K 2 O content 48.26% (potassium sulfate 89.34%), SO 2 32.86%, and the...

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Abstract

The invention discloses a production technology of wet-activated-carbon-based potassium sulfate. The production technology comprises the following steps of enabling concentrated sulfuric acid, straw and other biomass or other organic waste to be subjected to a reaction, so that wet activated carbon with good water preserving capability and high water absorption is generated; and enabling potassium hydroxide and concentrated sulfuric acid adsorbed by the wet activated carbon to be subjected to a neutralization reaction, and performing filtering separation, so that the wet-activated-carbon-based potassium sulfate having high efficiency, low cost and soil improvement effects is obtained. The production of the activated carbon is organically combined with the production of the potassium sulfate together, so that the production of the activated carbon not only omits a high temperature furnace of a physical method, but also prevents mass cleaning wastewater of a chemical method, the technology is greatly simplified, and the cost is remarkably reduced.

Description

technical field [0001] The invention belongs to the technical field of novel slow-controlled release fertilizers, and mainly relates to a production process of wet-process activated carbon-based potassium sulfate, in particular to a potassium sulfate slow-release fertilizer with wet-process activated carbon as the base and with soil improvement. Background technique [0002] my country is a large agricultural country, but it is also a large potassium-deficient country. Most of the land in our country is acidic red soil, and the content of potassium in the cultivated land south of the Yangtze River in my country is generally low. According to the survey of the Chinese Academy of Agricultural Sciences, the phenomenon of soil potassium deficiency in China is expanding from the south to the north, and the area of ​​potassium deficiency is also increasing year by year. Potassium deficiency has become the main constraint factor for crop production in many areas. [0003] In 2015, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05D1/02C01D5/00
CPCC05G3/00C01D5/00C05D1/02
Inventor 赵常然
Owner 赵常然
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