Preparation of super absorbent resin containing potassium and nitrogen

Abstract

The invention discloses a method for making super absorbent resin containing kalium and nitrogen. The method comprises the following main technological processes that: acrylic acid is adopted to pass through a neutral aluminum oxide chromatographic column so as to remove polymerization inhibitor; a mixed solution of sodium hydroxide and potassium hydroxide and acrylic acid undergo neutralization reaction in ice-water bath, and potato starch is mixed with deionized water so as to carry out gelatinization; the neutralized acrylic acid and the salt solution of the acrylic acid are mixed with the gelatinized potato starch, and then initiator potassium persulphate is added in; the mixture is stirred evenly under the protection of nitrogen and then is heated by water bath so as to ensure that potato starch, acrylic acid and the salt of the acrylic acid undergo graft copolymerization reaction under the protection of nitrogen; moreover, the mixture undergoes heat-preservation reaction and then is dried and crushed and dipped in ammonia water; then, the mixture is separated by anhydrous alcohol and then is dried and crushed again so as to obtain the super absorbent resin containing kalium and nitrogen. The super absorbent resin made by the method has greatly increased water-absorbing capacity and contains kalium and nitrogen nutrient element as compared with similar products; moreover, the super absorbent resin plays an important role in soil water conservation, desert control and plant growth, etc. in arid areas.

Description

technical field [0001] The invention relates to a preparation method of a superabsorbent resin used in agriculture, forestry, animal husbandry, gardening and daily necessities, in particular to a method for preparing a superabsorbent resin containing nutrients such as nitrogen and potassium by using potato starch and acrylic acid as main raw materials. Background technique [0002] The excellent water absorption and water retention properties of superabsorbent resin make it widely used in many fields. Disposable diapers and other sanitary products are the earliest application fields for superabsorbent resins, and they are still the largest consumer market for superabsorbent resins. Adding superabsorbent resin to the soil can change the aggregate structure of the soil, increase the water permeability and air permeability of the soil, and store the added water. It has attractive effects in soil moisture retention and desert control in arid areas. prospect. Now Japan and Fran...

AI Technical Summary

Problems solved by technology

Although my country has achieved certain results in the research of superabsorbent resins, compared with foreign countries, there is still a considerable gap, such as low water absorption of resins, poor salt resistance, low gel strength after water absorption, complex production processes, The cost of the product is high, especially there are not many studies on the theory of water absorption, the performance and application of water-absorbing agents, and the varieties and quantities produced by industrial manufacturers are still relatively small, and there are many tasks that need to be done in depth

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