Preparation method of water retention type fertilizer
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A water-retaining fertilizer technology, applied in the direction of organic fertilizers, excretion fertilizers, fertilizer mixtures, etc., can solve the problems of lack of nutritional function, high cost of superabsorbent resin, cost increase, etc., achieve good biological and chemical stability, and expand effective utilization , good water retention performance
Active Publication Date: 2012-07-25
黑龙江鑫洋肥业有限公司
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Problems solved by technology
[0010] In agricultural applications, due to the high cost of superabsorbent resins, the application and promotion of superabsorbent resins have been seriously hindered. Many domestic scientists have done a lot of work in reducing the cost of superabsorbent resins, but most of the work is mainly concentrated on Add cheap materials such as bentonite, kaolin and attapulgite to the polymerization system to achieve the purpose of reducing costs. Although adding some inorganic minerals can improve the hydrogel strength of the water-retaining material after absorbing water, but the performance is high. The amount of resin soil added is low, which cannot fundamentally reduce the cost of raw materials
In addition, the product function only has the same water absorption and water release functions as ordinary water-absorbent resins, and lacks nutritional functions.
[0011] The invention patent application with the publication number CN101113119A discloses a water-retaining fertilizer and its preparation method. It is prepared by mixing a superabsorbent resin with a chelating agent. The chelating agent is used to provide some nutrients, and this method has no way to reduce The processing cost of superabsorbent resin, while adding various components to the finished product further increases the cost of manufacturing
Method used
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Embodiment 1
[0027] 1) Put 50 parts by weight of acrylic acid in a container, add 350 parts by weight of deionized water and stir evenly, and adjust the pH value with potassium hydroxide to make the pH value of the system around 7.0;
[0028] 2) Weighing 30 parts by weight of dry natural sheep manure and pulverizing it into 100-mesh powder;
[0029] 3) Add the sheep manure powder prepared in step 2) to the solution prepared in step 1, then add 60 parts by weight of urea, 10-15 parts by weight of diammonium hydrogen phosphate, stir and dissolve, then pass nitrogen gas and stir at high speed for 30 minutes;
[0030] 4) Heat the solution in step 3 to 65°C for 20 minutes under a pressure of 0.03 Mpa to gelatinize;
[0031] 5) Add 1.0 parts by weight of potassium persulfate, add 1.0 parts by weight of sodium sulfite, stir evenly, add 0.5 parts by weight of cross-linking agent N,N'-methylene bisphenamide, polymerize at a temperature of 50 °C, polymerize The time is 1 hour to obtain a cross-link...
Embodiment 2
[0036] 1) Put 80 parts by weight of acrylic acid in a container, add 350 parts by weight of deionized water and stir evenly, and adjust the pH value with potassium hydroxide to make the pH value of the system around 7.0;
[0037] 2) Weighing 50 parts by weight of dry natural sheep manure and pulverizing it into 100-mesh powder;
[0038]3) Add the sheep manure powder prepared in step 2) to the solution prepared in step 1, then add 90 parts by weight of urea, 15 parts by weight of diammonium hydrogen phosphate, stir and dissolve, and then stir with nitrogen at high speed for 30 minutes;
[0039] 4) Heat the solution in step 3 to 65°C for 20 minutes under a pressure of 0.05 Mpa to gelatinize;
[0040] 5) Add 1.0 parts by weight of potassium persulfate as an oxidizing agent, 1.0 parts by weight of sodium sulfite as a reducing agent, and stir evenly, then add 0.5 parts by weight of a cross-linking agent N, N'-methylene bis-enamide, at a temperature of 60 ° C Polymerization, the po...
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Abstract
The invention relates to a preparation method of a water retention type fertilizer. The preparation method comprises the following steps that: 50 to 80 weight parts of crylic acid is placed in a container, 350 weight parts of de-ionized water is added to be stirred uniformly, and potassium hydroxide is used for regulating the PH value so that the PH value of the system is about 7.0; 30 to 50 weight parts of dry natural sheep manure is weighed and is crushed into powder of 100 meshes; the prepared sheep manure powder is added into the solution, next, 60 to 90 weight parts of carbamide and 10 to 15 weight parts of diammonium phosphate are added to be stirred and dissolved, then, nitrogen gas is introduced for stirring for 30 minutes at a high speed; mixture is heated to 65 DEG C at the pressure being 0.03 to 0.05 Mpa, and the pasting is carried out for 20 minutes; and 1.0 weight part of potassium persulfate salt and 1.0 weight part of sodium sulfite are added to be stirred uniformly, 0.5 weight part of N,N'-methylene bisacrylamide is added, the polymerization is carried out when the temperature is 50 to 60 DEG C, the polymerization time is one hour, crosslinked polymeric products are obtained, and the final product is obtained after nutritional ingredients are supplemented. The preparation method has the beneficial effects that the water retention type fertilizer obtained through the method provided by the invention has good water retention performance and good biologic and chemical stability, meanwhile, the natural sheep manure is used as a base material, the effective nutritional ingredients of the sheep manure are reserved, the effective utilization of resources is widened, and the cost can be greatly reduced.
Description
[0001] technical field [0002] The invention belongs to the field of superabsorbent resins, and in particular relates to a method for preparing water-retaining fertilizers. [0003] Background technique [0004] my country is a large agricultural country, and agriculture is the foundation of the national economy and an irreplaceable primary industry. Modern agriculture is characterized by low input, high output, high efficiency and sustainable development. The closely related chemical fertilizer industry and water resource utilization are the important material basis for modern agricultural production and development. Chemical fertilizers play an important role in agricultural production. According to the estimates of the Food and Agriculture Organization of the United Nations (FAO), 55% of the increase in food production in developing countries comes from the role of chemical fertilizers. However, due to factors such as volatilization, loss, and infiltration, the curre...
Claims
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Application Information
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