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Controlled release fertilizers made from cross-linked glyceride mixtures

A technology for controlled-release fertilizers and mixtures, applied in fertilizer mixtures, fertilizer forms, urea compound fertilizers, etc., can solve problems such as expensive production

Active Publication Date: 2015-08-12
AGRIUM ADVANCED TECH U S
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] While polymer-coated fertilizers as described above have received a great deal of attention, they are expensive to produce

Method used

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  • Controlled release fertilizers made from cross-linked glyceride mixtures
  • Controlled release fertilizers made from cross-linked glyceride mixtures
  • Controlled release fertilizers made from cross-linked glyceride mixtures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0149] In this example, the transesterification reaction is carried out between sunflower oil and polyhydroxy compound, QUADROL polyol (tetrakis(2-hydroxypropyl)ethylenediamine). The resulting mixture is used as a standby polyol.

[0150] The cross-linking reaction was carried out with 10% sulfur, using a temperature ramp procedure, where the reaction started at a temperature of 130°C, heated to 185°C in a period of 6 minutes, and then cooled to ambient temperature.

[0151] Both uncrosslinked and crosslinked polyol samples were used to coat urea at a rate of 2.5 min / layer at 60°C. Both samples have a coating weight of 2.7%. The release data for each sample is provided in figure 1 in.

Embodiment 2

[0153] Sample Preparation

[0154] In this study, two samples of controlled release fertilizer (CRF) based on soybean oil-derived monoglyceride / diglyceride mixture (mono:di=55:45) were prepared. The glyceride blend was obtained from Caravan Ingredients, Lenexa, KS. The cross-linking reaction was carried out with 10% sulfur using a temperature ramp program, where the reaction started at a temperature of 145°C, heated to 190°C, and then cooled to 100°C in a period of 35 minutes. Both uncrosslinked and crosslinked polyol samples were used to coat urea at a rate of 10 min / layer at 80°C. Both samples have a coating weight of 3.5 wt% (coating weight / total weight of the finished product).

[0155] Drip test

[0156] In this test, 30 g of the CRF particles of this example were dropped onto a metal plate from a height of 20 feet in a tube with a diameter of 4 inches. This test represents what CRF particles might endure during handling, transportation, and blending before being applied to ...

Embodiment 3

[0162] Sample Preparation

[0163] In this study, two samples of controlled-release fertilizer based on a mixture of monoglycerides / diglycerides derived from rapeseed oil (mono:di=55:45). The glyceride mixture used in this example is commercially available as BFP-L100 from Caravan Ingredients, Lenexa, KS. The crosslinking reaction was carried out with 5% sulfur at a constant temperature of 165°C for 1 h. Both uncrosslinked and crosslinked polyol samples were used to coat urea at a rate of 10 min / layer at 80°C. Both samples have a coating weight of 3.5 wt% (coating weight / total weight of the finished product).

[0164] The release data of each sample is provided in Table 2 below, and the release curve of each sample is as follows image 3 Shown in.

[0165] Table 2. Percent release of rapeseed oil glycerides with and without cross-linking

[0166]

[0167] Table 2 (continued). Percent release of glycerides using cross-linked and non-cross-linked rapeseed oil

[0168]

[0169]

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PUM

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Abstract

A controlled release fertilizer material comprising a particulate plant nutrient surrounded by a coating which is the reaction product of a mixture including a cross-linked polyol, an isocyanate and a wax is described. The cross-linked polyol is a reaction product of a polyhydroxyl compound, such as glycerol, and a triglyceride and the monoglyceride and / or diglyceride products are cross-linked with sulfur, oxygen and / or a peroxide cross-linking moiety, or are directly cross-linked at unsaturated sites in the monoglycerides and / or diglycerides.

Description

[0001] References to related applications [0002] This application claims the rights and interests of US Provisional Application No. 61 / 412,251 entitled "CONTROLLED RELEASE FERTILIZERS MADE FROM CROSS-LINKED GLYCERIDE MIXTURES" filed on November 10, 2010, the entire disclosure of which is incorporated herein. [0003] The present invention relates to controlled release fertilizers such as those disclosed in U.S. Patent No. 7,771,505 and U.S. Patent No. 6,663,686, both of which are incorporated herein by reference in their entirety for all purposes. In addition, this application involves the following commonly-owned and co-pending applications: US serial number 13 / XXX,XXX, which requires priority of US provisional application number 61 / 412,264 entitled CROSS-LINKED POLYOLS FOR CONTROLLED RELEASE FERTILIZERS and US application Serial No. 13 / XXX, XXX, which claims priority to U.S. Provisional Application No. 61 / 412,246 entitled CROSS-LINKED MODIFIED WAXES FOR CONTROLLED RELEASE FERTIL...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G71/04C05G3/00
CPCC08G18/36C08G75/04C05G3/0035C05G3/0029C07C327/22C05C9/00C05G3/0023C08G75/00C08G18/3868C08G75/26C05G5/36C05G5/38C05G5/37
Inventor 罗梅姆·阿夫达尔莱斯利·L·卡斯滕斯加勒德·李·哈格罗夫希拉马克里什纳·马鲁瓦达邢宝忠
Owner AGRIUM ADVANCED TECH U S
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