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Coating material prepared from fatty acid blackfoot and its application in slow/controlled release fertilizer

A technology of coating material and controlled-release fertilizer, which is applied in the directions of layered/coated fertilizer, application, fertilizer mixture, etc., can solve the problems of high cost of coating and controlled-release fertilizer, pollute the environment, etc. Simple process, easy to achieve effect

Active Publication Date: 2020-11-03
HUBEI SHIJI KAIYUAN CHEM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies of high cost and environmental pollution of existing coated controlled-release fertilizers and provide an environmentally friendly, easily degradable, highly efficient and controllable coated material prepared with fatty acid blackfoot

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Coating material prepared with fatty acid blackfoot

[0024] First, heat and melt the fatty acid distilled black foot and coarse bran wax in the melting tank respectively, then raise the temperature to 100°C to filter and remove impurities, then add 40kg of fatty acid black foot and 50kg of coarse bran wax into the reaction kettle and mix evenly Heat and keep warm at 100°C~120°C, slowly add 20 kg of hexamethylenediamine and 0.2 kg of phosphoric acid, stir and heat up to 200°C, keep warm, react for 3 hours, then add 3.7 kg of formaldehyde, dehydrate at 180°C for 1 hour, Finally, the temperature is lowered to 105°C and filtered, and the filtrate is sliced ​​into a microtome or added to a mold plate to cool, and then it is made into a brown wax block or flake or fine powder coating material, with a drop melting point of 87°C. Penetration 2.2.

[0025] Preparation of coated slow / controlled release fertilizers.

[0026] First place the coating material in the melting tank to...

Embodiment 2

[0028] Coating material prepared with fatty acid blackfoot

[0029] First, heat and melt the fatty acid black feet and coarse bran wax in the melting tank respectively, then raise the temperature to 100°C to filter and remove impurities, then add 45kg of fatty acid black feet and 45kg of coarse bran wax into the reaction kettle, mix and heat evenly And keep it warm at 100°C~120°C, slowly add 8 kg of ethylenediamine and 0.5 kg of p-toluenesulfonic acid, stir and heat up to 180°C, keep warm, react for 2.5 hours, then add formaldehyde 4.5 kg, Dehydrate for 1.5 hours while reacting, and finally cool down to 100°C and filter. The filtrate enters a microtome for slicing or puts it into a mold for cooling, and then it is made into a brown wax block or flake or fine powder coating material. The melting point is 83°C and the needle penetration is 2.3.

[0030] Preparation of Coated Slow / Controlled Release Fertilizer

[0031] First place the coating material in the melting tank to hea...

Embodiment 3

[0033] Coating material prepared with fatty acid blackfoot

[0034] First heat and melt the fatty acid black feet and coarse bran wax in the melting tank, then raise the temperature to 100°C to filter and remove impurities, then add 50 kg of fatty acid black feet and 40 kg of coarse bran wax into the reaction kettle, mix and heat evenly And keep it warm at 100°C~120°C, slowly add 10 kg of ethylenedienetriamine and 0.3 kg of methyl acetate, stir and heat up to 180°C, keep it warm, react for 2.5 hours, then add 5 kg of acetaldehyde, at 180°C Dehydrate for 1.5 hours while reacting, and finally cool down to 125°C and filter. The filtrate enters a microtome for slicing or puts it into a mold for cooling, and then it is made into a brown wax block or flake or fine powder coating material. The drop melting point is at 110°C and the needle penetration is 1.0.

[0035] Preparation of Coated Slow / Controlled Release Fertilizer

[0036] First place the coated material in the melting tan...

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Abstract

The invention discloses a coating material prepared from fatty acid pitch and an application of the coating material to slow / controlled release fertilizers. The coating material comprises, by weight, 40-60% of fatty acid pitch, 30-50% of crude bran wax, 4-20% of an aminating agent, 0.2-4% of a catalyst and 3-5% of a hardening agent. A coated slow / controlled release fertilizer is obtained by steps of carrying out uniform spraying or roll-painting of the coating material on the surface of fertilizer granules and then carrying out cooling solidification. By preparing the coating material from cheap and easily available fatty acid pitch, a new application direction of fatty acid pitch is developed. The prepared coating material is easily degradable, pollution-free and low-cost. According to a slow / controlled release fertilizer produced by the use of the coating material, slow / controlled release effect is adjustable within 30d-180d. Dosage of the coating material is 3-8% of the amount of fertilizer materials. Thus, cost is low. The preparation and application process of the coating material is simple, and equipment investment is little. Industrial continuous production is easy to realize.

Description

technical field [0001] The invention belongs to the technical field of resource comprehensive utilization, materials and novel fertilizers. The invention relates to a utilization method of the fatty acid blackfoot, and in particular relates to a coating material prepared by using the fatty acid blackfoot and its application in slow / controlled release fertilizers. Background technique [0002] Fatty acid black foot, also known as fatty acid distillation black foot, is also called plant pitch, which is the bottom residue of the distillation tower in the process of preparing fatty acid in oil chemical industry, and belongs to the waste of the factory. It is often recycled by some industries and directly used as spray gun oil (burning oil), adhesive, casting grease, mold release agent, waterproof asphalt, etc. Due to the uneven quality of fatty acid black feet, the modification technology cannot keep up, and it can only be suitable for the lowest-end applications. With the dev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/40C05G5/30C05G3/90
CPCY02A30/30
Inventor 付德海赵玉辉付文聪
Owner HUBEI SHIJI KAIYUAN CHEM SCI & TECH CO LTD
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