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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

Inactive Publication Date: 2016-06-22
JIANGYIN LIANYE BIOTECHOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fertilizers coated with resin have good controlled-release performance, but the price of resin-based polymer membrane materials is relatively high, and they degrade slowly in the soil, causing soil pollution due to long-term accumulation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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PUM

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Abstract

The invention discloses a starch acetate membrane controlled release nitrogenous fertilizer production technology. The production technology comprises high-substitution degree starch acetate preparation, coating membrane solution preparation and coating with a membrane. A high-molecular copolymer of the high-substitution degree starch acetate and corresponding ethyl cellulose forms a starch acetate membrane and the starch acetate membrane is continuous, has a compact structure and fine quality and has obvious water resistance. The coating material has a certain controlled release capability and the high-substitution degree starch acetate and ethyl cellulose can be combined to form a membrane material satisfying fertilizer coating requirements.

Description

technical field [0001] The invention relates to the field of fertilizers, in particular to a production process of acetate starch film controlled-release nitrogen fertilizer. Background technique [0002] Coated fertilizers are the fastest-growing new type of chemical fertilizers among controlled-release fertilizers. The controlled release technology of fertilizer coating is to form a protective film on the surface of instant fertilizer particles to delay the release of fertilizer nutrients, which can effectively improve the utilization of quick-acting fertilizers. The diversity of coating layer structures formed by different coating materials and coating processes makes the nutrient release mechanism and characteristics of coated fertilizers with different membrane material formulations different. Therefore, the development of controlled release membrane materials has become an important aspect of fertilizer controlled release technology application key factor. Fertilizer...

Claims

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Application Information

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IPC IPC(8): C05G3/00C08B31/04
Inventor 陆建明
Owner JIANGYIN LIANYE BIOTECHOLOGY
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