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Middle element calcium magnesium and sulfur water-retaining agent and preparation method thereof

A technology of elemental calcium and water-retaining agent, which is applied in the field of agriculture and forestry to achieve the effects of saving water resources, facilitating large-scale production, and saving investment

Active Publication Date: 2010-02-03
GUOJIA NEW MATERIAL HUBEI ENVIRONMENTAL PROT GEL IND PARK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In short, there is no medium element calcium magnesium sulfur water retaining agent in China that embeds the medium element calcium magnesium sulfur in the water retaining agent so that the calcium magnesium potassium element can be slowly released in the hydrogel network. technical solutions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Add 0.003 g of N,N'-methylenebisacrylamide and 0.003 g of potassium persulfate to 300 g of acrylic acid solution with a weight concentration of 10% and a neutralization degree of 100% with sodium hydroxide under stirring, and dissolve, Then, 24 grams of mechanically pulverized calcium carbonate and 15 grams of magnesium sulfate (average particle size ≤ 45um) were added, and stirred or ultrasonically dispersed for 10 minutes. After the dispersed mixture was stirred and heated at 40°C for 5 hours in the reactor, the temperature was raised to 30°C and reacted for 5 hours to obtain a polymer product; The method makes it pulverized to 0.1-2.0mm, and finally obtains calcium magnesium sulfur water-retaining agent (granular product).

Embodiment 2

[0049] In 300 grams of acrylic acid solution with a weight concentration of 30% and a degree of neutralization of 80%, add 0.09 grams of N,N'-methylenebisacrylamide and 0.09 grams of potassium persulfate under stirring, dissolve, and then mechanically pulverize them. 72 grams of calcium carbonate and 9 grams of magnesium sulfate (average particle size ≤ 45um) were added, and stirred or ultrasonically dispersed for 10 minutes. After the dispersed mixed material is heated in the reactor at 90°C for 1 hour, the temperature is raised to 10°C and reacted for 1 hour to obtain a polymer product; It is pulverized to 0.1-2.0 mm, and finally calcium magnesium sulfur water-retaining agent (granular product) is obtained.

Embodiment 3

[0051] In 300 g of acrylic acid solution with a weight concentration of 25% and a degree of neutralization of 70%, add 1.5 g of N,N'-methylenebisacrylamide and 0.75 g of potassium persulfate under stirring, dissolve, and then mechanically pulverize it. 37.5 grams of calcium carbonate and 9 grams of magnesium sulfate (average particle size ≤ 45um) were added, and stirred to dissolve. After the mixture is heated at 70°C for 3 hours in the reactor, the temperature is raised to 20°C and reacted for 2 hours to obtain a polymer product; the polymer product is dried at 110°C to a water content of less than 20%, and then pulverized by a mechanical method. 0.1~2.0mm, and finally obtain calcium magnesium sulfur water-retaining agent (granular product).

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Abstract

The invention relates to a middle element calcium magnesium and sulfur water-retaining agent and a preparation method thereof. The agent is prepared by raw materials of calcium carbonate powder, magnesium sulfate powder, water-solubility polymerization monomer, water, free radical polymerization initiating agent and cross linking agent which are mixed, heated, polymerized, dried and ground; the cost of the raw materials of middle element calcium magnesium and sulfur water-retaining agent is reduced by 20-0%. Experiments show that the range of liquid absorbency rate of the series of products isas follows: distilled water absorbency rate is 100-500g / g, running water absorbency rate is 60-350%, and normal saline solution rate of 20-62g / g. The middle element calcium magnesium and sulfur water-retaining agent is both fertilizer and water-retaining agent and plays a role in keeping soil moisture, saving water sources, and stably and everlastingly fertilizer. The main production raw materials of the invention are very abundant and has the advantages of short technique process, investment consumption and convenient for large-scale production, etc.

Description

technical field [0001] The invention relates to a calcium-magnesium-sulfur water-retaining agent with medium amount elements and a preparation method thereof, which are mainly used in the field of agriculture and forestry. Background technique [0002] The middle elements calcium, magnesium and sulfur have the functions of nutrition and soil improvement. Calcium is a component that constitutes the somatic cells of crops. It has a certain impact on the metabolic process in the crop. It is related to the development of the root system. It can also eliminate the toxic effects of some harmful substances in the crop and enhance the ability of plants to resist pests and diseases. Magnesium is the main component of crop chlorophyll, which can promote the metabolism of crops, accelerate crop growth, increase yield and improve quality. Sulfur is involved in metabolism and is a component of amino acids, proteins and protoplasm in crops. [0003] Slow-release fertilizer is a new type...

Claims

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Application Information

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IPC IPC(8): C09K17/48C09K101/00C09K109/00
Inventor 王海波范力仁栗海峰刘仲康胡茂华王中元熊静峦刘霞
Owner GUOJIA NEW MATERIAL HUBEI ENVIRONMENTAL PROT GEL IND PARK CO LTD
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