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Preparation method of superabsorbent resin rich in plant nutrients

A technology for plant nutrients and superabsorbent resin, applied in the field of resin manufacturing, can solve the problems of single function, slow water absorption rate, poor salt resistance, etc., and achieve the effects of simple production process, low cost, good water absorption and water retention performance

Inactive Publication Date: 2016-01-06
雷春生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem mainly solved by the present invention: In order to maintain the fertilizer efficiency and water absorption performance of the soil in the process of fertilizing the soil, a superabsorbent resin is often added, but the superabsorbent resin added at present has a single function, and most of them only have water absorption and water retention. Function, and the problem of poor salt tolerance and slow water absorption rate, a preparation method of superabsorbent resin rich in plant nutrients is provided. The present invention uses potatoes for pretreatment, and then adds potassium dihydrogen phosphate and urea to it to prepare into a powder, and then use 2-methylene succinic acid and a cross-linking agent to make a homogeneous monomer mixed solution, dissolve the prepared powder in distilled water, gelatinize under microwave heating, and slowly drop into it after gelatinization Add the mixed solution, and finally add the ammonium persulfate aqueous solution dropwise to the reaction system to carry out the polymerization reaction, precipitate with ethanol, wash, dry, add acetone to extract, separate and dry, and finally crush into granules to obtain a plant rich in nutrient elements super absorbent resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First, take 2kg of fresh potatoes and wash them with deionized water, then cut them into slices and dry them, put them into a pulverizer after drying, and sieve out the 100-mesh powder, take 100g of the powder and add it to a 500mL three-necked flask to determine the solid-liquid mass. Add N,N-dimethylene formamide reaction medium to the bottle at a ratio of 1:1, stir evenly, place in an ultrasonic cleaning tank for ultrasonic pretreatment at 40kHz, 300W for 20min; after ultrasonic treatment, add 30g of potassium dihydrogen phosphate and 20g of urea were added to the above-mentioned three-necked flask, put it into a water bath and heat up to 50°C, and reacted for 2h under stirring conditions. After the reaction, the product in the bottle was cooled to room temperature, then filtered and dried in an oven at 50°C , after drying, sieve 100-mesh powder and keep it for later use; weigh 40g of 2-methylene succinic acid and add it to a 500mL beaker, then add 200mL deionized wat...

example 2

[0020]First, take 2.5kg of fresh potatoes and wash them with deionized water, then slice and dry them, put them into a pulverizer after drying, and sieve out the 150-mesh powder, take 125g of the powder and add it to a 500mL three-neck flask, and use solid-liquid Add N,N-dimethyleneformamide reaction medium into the bottle at a mass ratio of 1:1, stir evenly, and place in an ultrasonic cleaning tank for ultrasonic pretreatment at 40kHz and 300W for 25min; after ultrasonic treatment, 33g of dihydrogen phosphate Potassium and 25g of urea were added to the above-mentioned three-necked flask, put it into a water bath and heat up to 70°C, and reacted for 3h under stirring conditions. After the reaction, the product in the bottle was cooled to room temperature, and then filtered and placed in an oven at 50°C After drying, sieve 150-mesh powder and keep it for later use; weigh 50g of 2-methylene succinic acid and add it to a 500mL beaker, then add 200mL deionized water to the beaker, ...

example 3

[0023] First, take 3kg of fresh potatoes and wash them with deionized water, then slice and dry them, put them into a pulverizer after drying, and sieve out the 200-mesh powder, take 150g of the powder and add it to a 500mL three-necked flask to determine the solid-liquid mass. Add N,N-dimethylene formamide reaction medium to the bottle at a ratio of 1:1, stir evenly, and place it in an ultrasonic cleaning tank for ultrasonic pretreatment at 40kHz and 300W for 30min; after ultrasonic treatment, add 35g of potassium dihydrogen phosphate and 30g of urea were added to the above-mentioned three-necked flask, put it into a water bath and heat up to 90°C, and reacted for 4h under stirring conditions. After the reaction, the product in the bottle was cooled to room temperature, and then filtered and dried in an oven at 50°C , after drying, sieve 200-mesh powder and keep it for later use; weigh 60g of 2-methylene succinic acid and add it to a 500mL beaker, then add 200mL deionized wate...

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Abstract

The invention discloses a preparation method of superabsorbent resin rich in plant nutrients, belonging to the field of resin production. The preparation method comprises the steps of firstly, pretreating potatoes; then, adding monopotassium phosphate and urea into the potatoes to prepare powder; next, preparing a homogeneous-phase monomer mixed solution from 2-itaconic acid and a crosslinking agent; dissolving the prepared powder into distilled water, pasting under microwave heating, and slowly and dropwise adding the mixed solution after pasting; and finally, dropwise adding an ammonium persulfate water solution into a reaction system to carry out polymerization reaction, and smashing into particles to obtain the superabsorbent resin rich in plant nutrients. Compared with different resins, the superabsorbent resin prepared by using the preparation method not only has favorable water absorption and retention properties, but also is rich in plant nutrients including nitrogen, phosphorus and potassium, can be widely applied to agriculture and forestry aspects and is environmentally friendly; in addition, the preparation method is simple in production process and low in cost.

Description

technical field [0001] The invention discloses a preparation method of a superabsorbent resin rich in plant nutrient elements, belonging to the field of resin manufacture. Background technique [0002] Superabsorbent resin is a polymer containing hydrophilic groups such as carboxyl groups and hydroxyl groups and has a certain degree of crosslinking. It is insoluble in water and organic solvents, and has the characteristics of high water absorption, strong water retention, fast water absorption, and strong gel strength. Therefore, in the fields of daily necessities, agriculture, industry, construction, and medical care, the practical application of superabsorbent resins has become more and more extensive. The superabsorbent resin not only allows water to enter, but also allows some fertilizer molecules, ions and particles to diffuse in. The molecules, ions and particles that enter the superabsorbent resin will be wrapped by the swollen superabsorbent resin gel network. In t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F222/38C08F226/10
Inventor 雷春生王志慧
Owner 雷春生
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