Coated fertilizer with swill oil as filming material

A kind of hogwash oil and fertilizer technology, applied in the form of fertilizer, fertilizer mixture, application, etc., can solve environmental pollution and other problems, achieve the effect of low production cost, important social significance, and solve environmental and sanitation problems

Inactive Publication Date: 2007-11-28
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of film-coated fertilizer prepared by using hogwash oil as the raw material of the membrane material, and at the same time meet the actual needs of treating hogwash oil, solving environmental pollution, environmental protection and sanitation problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The processing of embodiment 1 hogwash oil

[0026] (1) Take 2000g of commercially available hogwash oil left in the food and beverage industry and centrifuge to precipitate, and carry out solid-liquid separation and impurity removal;

[0027] (2) Add 450g of water to 1500g of the separated liquid oil, heat to 85°C, start stirring, slowly add concentrated sulfuric acid dropwise until the pH value is 2, stir for 30min, let stand to separate layers, and separate the lower water layer with a separatory funnel , to remove phospholipids, colloids and other substances;

[0028] (3) Wash 1200g of hogwash oil after acid analysis with 360g of 85-90°C clear water for 3-5 times until the pH value is 6-8;

[0029] (4) 1000 g of hogwash oil washed with water was dried at 110° C. under vacuum at 5 mmHg for 3 hours.

Embodiment 2

[0031] (1) Take 900 g of hogwash oil and 34.0 g of pentaerythritol obtained in Example 1 and add them to a four-necked flask, ventilate nitrogen, and heat to 200 ° C. After the pentaerythritol is completely dissolved, stir and add 0.6 g of calcium oxide, keep warm for 15 minutes, and continue to heat up to 230 ° C. ℃, keep warm for 2 hours, take out of the pot, and dry at 110 ℃ for 2 hours under vacuum at 5 mmHg to obtain alcoholysis hog oil;

[0032] (2) get alcoholysis hog oil 300g, polymerized MDI100g mix uniformly to obtain the prepolymer that molecular weight is 5000-8000;

[0033] (3) Spray the prepolymer onto the surface of 4000g of urea, then add 1100g of phosphate rock powder, distribute the film material evenly on the surface of the fertilizer in the drum, and solidify to form a film.

Embodiment 3

[0035] (1) Take 900 g of hogwash oil and 30.7 g of glycerin obtained in Example 1 and put them into a four-necked flask, pass nitrogen gas, heat to 200° C., stir and add 1.0 g of calcium oxide, keep warm for 15 minutes, continue to heat up to 240° C., keep warm for 2 hours, and leave Pot, 110 ℃ vacuum 5mmHg drying 2h, to obtain alcoholysis hog oil;

[0036] (2) getting alcoholysis hog oil 300g, polymerized MDI300g and mixing uniformly to obtain a prepolymer whose molecular weight is 5000-8000;

[0037] (3) Spray the prepolymer onto the surface of 4000g of urea, then add 400g of phosphate rock powder and 150g of bentonite, distribute the film layer material evenly on the surface of the fertilizer in the drum, and absorb the moisture in the air to solidify into a film.

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Abstract

The present invention provides one kind of coated fertilizer, and its filming material consists of swill oil 16-54 weight portions, 4, 4'-diphenylmethane diisocyanate 6-34 weight portions and inorganic stuffing 33-67 weight portions. The filming material has low cost and is degradable, and the utilization of swill oil can change waste into useful material and is favorable to environmental hygiene.

Description

technical field [0001] The invention relates to the field of coated fertilizers, in particular to a coated fertilizer using hogwash oil to prepare membrane materials. Background technique [0002] Hogwash oil is non-edible toxic and harmful oil obtained by extracting waste food in the catering industry through simple heating and dehydration, slag removal, neutralization and other processes. In recent years, in many developed cities, criminals often mix it into cooking oil for illegal sales, seriously endangering people's health. If it is not recycled, it will not only waste precious natural resources, but also cause secondary pollution. [0003] At the same time, in order to solve the problem of low utilization rate of traditional fertilizers, slow / controlled release fertilizers, especially coated fertilizers, have also achieved great development in the world, such as US patents US3475,154, US3264089, US5599374, Canadian patents CA2135788 and others. The problem with thes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05G5/00C08L91/00C08L75/00
Inventor 谷文祥莫莉萍毛小云卢其明
Owner SOUTH CHINA AGRI UNIV
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