Polymer sulfur coated controlled release fertilizer and preparing method thereof

A technology for slow-release fertilizers and manufacturing methods, applied in the direction of layered/coated fertilizers, organic fertilizers, inorganic fertilizers, etc., can solve the problems of high coating rate, complex production process, and high equipment requirements, and achieve improved impact resistance and performance Abrasion resistance, increased nutrient content, and the effect of less membrane material consumption

Inactive Publication Date: 2017-01-11
美稼农业科技(上海)有限公司 +1
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  • Abstract
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Problems solved by technology

[0004] Existing sulfur-coated slow-release fertilizers have too thick a sulfur coating, resulting in low nutrient content in the coating and low economic efficiency, and the sulfur-coated material is relatively brittle, has poor toughness, low impact resistance and wear resistance, and slow-release performance Unstable, blasting release in the early stage, nutrient locking in the later stage cannot be released, and nutrients cannot be supplied according to the nutrient demand in the growth process of crops, and the use of sealing materials cannot be completely improved, and it ...

Method used

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  • Polymer sulfur coated controlled release fertilizer and preparing method thereof

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[0024] 1. Urea granules (the weight accounts for 92% of the total weight of the granular fertilizer, wherein the weight percentage of nitrogen is 42% (42N), first preheats, sprays urea melt, accounts for 0.2% of the total weight of the granular fertilizer, and adds 0.3 % alginic acid. Secondly, polymer coating (reaction by vegetable oil-based isocyanate and vegetable oil polyol), spraying thickness is based on 2% of the total weight of the granular fertilizer, and again is a modified sulfur coating, accounting for 5.5% of the total weight of the granular fertilizer, Finally, the natural modified polymer wax is coated, accounting for 0.3% of the total weight of the granular fertilizer. The finished product (42-0-0-0.2U-2P-5.5S-0.3W) is measured and packaged, and the dissolution rate in 24 hours is 3.2%.

[0025] 2. Urea granules (the weight accounts for 94% of the total weight of the granular fertilizer, wherein the weight percentage of nitrogen is 43% (43N)), first preheating, ...

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Abstract

The invention discloses a polymer sulfur coated slow-release fertilizer and a manufacturing method thereof, first of all, implement granulated fertilizer coating through melting urea, next, reaction of two or above polymer precursors on the surface of granulated fertilizer coated with urine will be achieved to form polymer wrapper, after that, coat the polymer wrapper with modified molten sulfur, and the outermost layer coating is with naturally modified polymer wax combination, which greatly reduces coating materials dosage, improves controlled release properties and nutrient content, the product toughness, abrasive resistance and impact resistance is favorable, low comprehensive cost, membrane materials can be degraded, and of eco-environment protection.

Description

technical field [0001] The invention relates to a polymer sulfur-coated slow-release fertilizer and a manufacturing method thereof, belonging to the field of fertilizer manufacturing, and more specifically relates to granular fertilizers according to molten urine treatment layer, polymer coating, sulfur coating, natural modification polymerization Slow-release fertilizers coated sequentially with wax composition coatings, less coating materials, good controlled release, good toughness, wear resistance and impact resistance, high nutrient content, high fertilizer utilization rate, low overall cost, Suitable for all kinds of granular fertilizers, not limited by fertilizer type and particle size, the membrane material can be degraded in the soil, and is environmentally friendly. Background technique [0002] Fertilizer is the food of food and an important means of agricultural production, which plays a vital role in increasing food production. my country is the country with th...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05C9/00C05D1/02C05G3/00C05G5/30C05F11/00
Inventor 吕云峰吕睿哲曹羽青
Owner 美稼农业科技(上海)有限公司
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