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Degradable mineral fertilizer water-retaining agent and preparation method thereof

A technology of mineral fertilizers and water-retaining agents, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve problems such as difficult biodegradation, achieve mild activation conditions, short process flow, and good salt resistance

Inactive Publication Date: 2017-04-19
信阳市华达矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because its polymer skeleton is cross-linked polyacrylic acid (sodium), it is difficult to biodegrade in soil

Method used

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  • Degradable mineral fertilizer water-retaining agent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Add 15g of tapioca starch, 0.003g of N,N'-methylenebisacrylamide, and 0.003g of potassium persulfate to 300g of acrylic acid solution with a weight concentration of 10% and a neutralization degree of 100% with sodium hydroxide. gram, dissolve, and then add 24 grams of mechanically pulverized Xinyang bentonite and 24 grams of activated mica, and stir or ultrasonically disperse for 10 minutes. Stir and heat the dispersed mixed material in the reactor at 40°C for 5 hours, then raise the temperature to 30°C for 5 hours to obtain a polymer product; The method is to crush it to 0.1-2.0 mm, and finally obtain a degradable mineral fertilizer water-retaining agent (granular product).

Embodiment 2

[0062] In 300 g of acrylic acid solution with a weight concentration of 30% and a neutralization degree of 80%, add 25 g of tapioca starch, 0.09 g of N,N'-methylenebisacrylamide, and 0.09 g of potassium persulfate under stirring, dissolve, and then Add 90 grams of mechanically pulverized Xinyang bentonite and 90 grams of activated mica, and stir or ultrasonically disperse for 10 minutes. Heat the dispersed mixed material in the reactor at 90°C for 1 hour, then raise the temperature to 10°C and react for 1 hour to obtain a polymer product; the polymer product is dried at 100°C until the water content is less than 20%, and mechanically It is crushed to 0.1-2.0 mm, and finally a degradable mineral fertilizer water-retaining agent (granular product) is obtained.

Embodiment 3

[0064] Add 15g of tapioca starch, 1.5g of N,N'-methylenebisacrylamide, and 0.75g of potassium persulfate into 300g of acrylic acid solution with a weight concentration of 25% and a neutralization degree of 70% under stirring, dissolve, and then Add 15 grams of mechanically pulverized Xinyang bentonite and 15 grams of activated mica, and stir or ultrasonically disperse for 10 minutes. Heat the dispersed mixed material in the reactor at 70°C for 3 hours, then increase the temperature at 20°C for 2 hours to obtain a polymer product; dry the polymer product at 110°C until the water content is less than 20%, and use mechanical methods to It is crushed to 0.1-2.0 mm, and finally a degradable mineral fertilizer water-retaining agent (granular product) is obtained.

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Abstract

The invention relates to a degradable mineral fertilizer water-retaining agent and a preparation method thereof, and is mainly applied to the agriculture and forestry field. The degradable mineral fertilizer water-retaining agent is prepared from Xinyang bentonite, activated mica, cassava starch, a water-soluble polymeric monomer, water, a free radical polymerization initiator, a cross-linking agent and other raw materials by means of mixing, heating polymerization, drying and crushing. Specifically, the adding weight of the Xinyang bentonite, activated mica and cassava starch respectively account for 20-100%, 20-100% and 20-60% of the water-soluble polymeric monomer. The degradable mineral fertilizer water-retaining agent provided by the invention is a fertilizer, also is a water-retaining agent, and can play the role of maintaining soil moisture, saving water resources, and supplying fertilizer stably and durably. The degradable mineral fertilizer water-retaining agent has the characteristics of simple preparation method and low cost, also has potassium endowment, water absorption and water retention multiple functions, and has biodegradability at the same time.

Description

technical field [0001] The invention belongs to the technical field of fertilizers for agriculture and forestry, and in particular relates to a water-retaining agent for degradable mineral fertilizers and a preparation method thereof. Background technique [0002] Slow-release fertilizer is a new type of fertilizer with high technical content that regulates the release rate of nutrients. Its nutrient release rate can be regulated by physical, chemical and biotechnological means, so that the supply of nutrients in the fertilizer and the crop's demand for nutrients Basic synchronization to achieve dynamic balance [1-2] . The use of this new type of fertilizer can reduce the loss of nutrients and improve the utilization rate of fertilizers. [0003] Judging from the current situation of producing controlled-release fertilizers in the world, the types of controlled-release fertilizers that have been industrialized are mainly polymer-coated nitrogen, phosphorus, and potassium f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 范力仁宋吉青周洋
Owner 信阳市华达矿业有限公司
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