Starch acetate membrane controlled release nitrogenous fertilizer production technology
A kind of technology of acetate starch and production process, applied in fertilization equipment, fertilizer mixture, application, etc., can solve the problems of soil pollution, high price, slow degradation, etc., and achieve the effect of obvious water resistance, compact structure, and fine quality
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Embodiment 1
[0013] The production technique of the acetate starch film controlled release nitrogen fertilizer of embodiment 1, comprises the following steps:
[0014] S1: Add starch to the reaction vessel, add picoline esterification catalyst solution, mix and stir at room temperature for 30 minutes, heat the oil bath to 110°C, activate for 3 hours, add water for gelatinization, add picoline as water-carrying agent , after reflux and water separation, add acetic anhydride esterification agent solution to it, the reaction temperature is 145°C, the reaction time is 5h, after the reaction is completed, cool to room temperature, add acetone equivalent to the reaction residue in the reaction vessel, stir, and wait to mix After uniformity, pour the mixed solution into excess cold water with stirring to obtain a white flake-like precipitate, which is fully washed with water, filtered, and dried in an oven to obtain acetate starch with a high degree of substitution;
[0015] S2: Take 100g of acet...
Embodiment 2
[0019] The production technology of the acetate starch film controlled release nitrogen fertilizer of embodiment 2, comprises the following steps:
[0020] S1: Add starch to the reaction vessel, add picoline esterification catalyst solution, mix and stir at room temperature for 30 minutes, heat the oil bath to 110°C, activate for 3 hours, add water for gelatinization, add picoline as water-carrying agent , after reflux and water separation, add acetic anhydride esterification agent solution to it, the reaction temperature is 145°C, the reaction time is 5h, after the reaction is completed, cool to room temperature, add acetone equivalent to the reaction residue in the reaction vessel, stir, and wait to mix After uniformity, pour the mixed solution into excess cold water with stirring to obtain a white flake-like precipitate, which is fully washed with water, filtered, and dried in an oven to obtain acetate starch with a high degree of substitution;
[0021] S2: Take 100g of ace...
Embodiment 3
[0025] The production technique of the acetate starch film controlled release nitrogen fertilizer of embodiment 3, comprises the following steps:
[0026] S1: Add starch to the reaction vessel, add picoline esterification catalyst solution, mix and stir at room temperature for 30 minutes, heat the oil bath to 110°C, activate for 3 hours, add water for gelatinization, add picoline as water-carrying agent , after reflux and water separation, add acetic anhydride esterification agent solution to it, the reaction temperature is 145°C, the reaction time is 5h, after the reaction is completed, cool to room temperature, add acetone equivalent to the reaction residue in the reaction vessel, stir, and wait to mix After uniformity, pour the mixed solution into excess cold water with stirring to obtain a white flake-like precipitate, which is fully washed with water, filtered, and dried in an oven to obtain acetate starch with a high degree of substitution;
[0027] S2: Take 100g of acet...
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