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Compound fertilizer with super-high water retention and drought resistance, and preparation method for compound fertilizer

A compound fertilizer, super technology, applied in fertilizer mixture, fertilization device, application, etc., can solve the problems of poor salt tolerance, unstable water retention performance, etc., achieve good salt tolerance, stable and excellent water absorption and water retention performance, and improve utilization rate Effect

Inactive Publication Date: 2015-07-22
BEIJING XINDA HONGYING ENVIRONMENTAL PROTECTION ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to aim at the technical problems existing in the prior art, to provide a kind of super water-retaining and drought-resistant composite fertilizer with strong water-absorbing and water-retaining performance and good salt tolerance and its preparation method, which combines the modified super-strong water-absorbing resin with the soil needs The combination of high-quality nutrient fertilizers greatly improves the water absorption and water retention, salt tolerance, thermal stability and reusability of high water absorption and water retention materials, and solves the problems of unstable water retention performance and poor salt tolerance in fertilizers.

Method used

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  • Compound fertilizer with super-high water retention and drought resistance, and preparation method for compound fertilizer
  • Compound fertilizer with super-high water retention and drought resistance, and preparation method for compound fertilizer
  • Compound fertilizer with super-high water retention and drought resistance, and preparation method for compound fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Preparation of ultra-fine silica sol: After diluting and dissolving sodium silicate in water, ultrasonically oscillate for 20 minutes and mix evenly to form a water glass solution with a concentration of 25 wt%. 2 Mix to obtain composite resin; fully stir and mix the water glass solution and the composite exchange resin according to the weight ratio of 20:1, remove impurities, and obtain a pretreated silicic acid solution; add alkali solution to the silicic acid solution, and adjust the pH value to 9.5, The silica sol mother liquor was obtained after heating and reacting at 70°C under normal pressure for 2 hours; the silica sol mother liquor was dehydrated, concentrated and purified to prepare a silica sol with a concentration of 20 wt%, wherein the silica particle size was between 1-100nm.

[0048] At room temperature, add 4 g of carboxyethyl cellulose to deionized water, stir until completely dissolved under nitrogen protection, then add 3 g of 20 wt % superfine silica...

Embodiment 2

[0051] Preparation of ultrafine silica sol: After diluting and dissolving sodium silicate in water, ultrasonically oscillate for 10 minutes and mix evenly to form a water glass solution with a concentration of 30wt%. Strongly acidic cation exchange resin and strongly basic anion exchange resin are mixed in a volume ratio of 1: 3 Mix to obtain composite resin; fully stir and mix the water glass solution and the composite exchange resin at a weight ratio of 40:1, remove impurities, and obtain a pretreated silicic acid solution; add alkali solution to the silicic acid solution, and adjust the pH value to 9, After heating and reacting at 85°C under normal pressure for 1 hour, the silica sol mother liquor was obtained; the silica sol mother liquor was dehydrated, concentrated and purified to prepare a silica sol with a concentration of 20 wt%, wherein the silica particle size was between 1-100nm.

[0052] At room temperature, add 5 g of carboxyethyl cellulose to deionized water, sti...

Embodiment 3

[0055] Preparation of ultra-fine silica sol: After diluting and dissolving sodium silicate in water, ultrasonically oscillate for 15 minutes and mix evenly to form a water glass solution with a concentration of 20wt%. Strongly acidic cation exchange resin and strongly basic anion exchange resin are mixed in a volume ratio of 1: 2.5 Mixing to obtain a composite resin; fully stir and mix the water glass solution and the composite exchange resin at a weight ratio of 30:1 to remove impurities to obtain a pretreated silicic acid solution; add alkali solution (NaOH solution) to the silicic acid solution to adjust the pH The value is 10, and the silica sol mother liquor is obtained after heating and reacting at 80°C under normal pressure for 3 hours; the silica sol mother liquor is dehydrated, concentrated and purified to prepare a silica sol with a concentration of 20wt%, wherein the silica particle size is between 1- Between 100nm.

[0056] At room temperature, add 10 g of carboxye...

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Abstract

The invention relates to a compound fertilizer with super-high water retention and drought resistance, and belongs to the field of agricultural fertilizer. The compound fertilizer comprises the flowing components in percentage by weight: 1-10% of modified super-high water-absorbent resin, and 90-99% of a soil fertility agent, wherein the modified super-high water-absorbent resin comprises the following components in parts by weight: 30-50 parts of ultrafine silica sol or nano-silica, 10-20 parts of nano-titanium dioxide, 40-100 parts of carboxyethyl cellulose or hydroxypropyl methyl cellulose, 20-30 parts of N-isopropyl acrylamide, 0.02-0.3 part of a crosslinking agent and 0.4-1.2 parts of an initiator; the solid content of the ultrafine silica sol is 10-30 wt%, and the silica particle size is 1-100 nm. The compound fertilizer provided by the invention has stable and excellent water absorption and retention performance, has well salt tolerance, can generate very strong adhesiveness with gravel and sand, can be mixed with sand through a dry process or a wet method, and is non-toxic, odorless, non-polluting and biodegradable.

Description

technical field [0001] The invention relates to an agricultural fertilizer in arid areas, in particular to a novel super-strong water-retaining and drought-resistant compound fertilizer and a preparation method thereof, belonging to the field of agricultural fertilizers. Background technique [0002] my country is a country with a large area of ​​dry land, and the arid and semi-arid areas account for more than half of the total land area. At the same time, my country is one of the 13 countries with the poorest fresh water resources in the world, and the temporal and spatial distribution of water resources is uneven. Therefore, in order to develop my country's agriculture, increase the yield and quality of crops, and improve people's living standards, we should first start with dry land water-saving agriculture, vigorously research and promote the relevant knowledge and technology of water-saving agriculture, so that limited water resources can be obtained in the most economi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 朱红
Owner BEIJING XINDA HONGYING ENVIRONMENTAL PROTECTION ENG CO LTD
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