| 发明名称 |
METHOD OF PREPARING A SLOW RELEASE FERTILIZER |
| 摘要 |
Provided is a method for preparing slow release fertilizer with a coated surface. Furthermore, a formulation of the coating layer 1 comprises lignin, alkenylsuccinic anhydride, stearic acid, polyethylene glycol (PEG)-2000 and kaolin. |
| 申请公布号 |
US2015259261(A1) |
申请公布日期 |
2015.09.17 |
| 申请号 |
US201214430696 |
申请日期 |
2012.09.26 |
| 申请人 |
UPM-KYMMENE CORPORATION |
发明人 |
Li Zhiyong;Zhang Yan |
| 分类号 |
C05G3/00;C09D197/00;C08K5/06;C08K5/12;C08K5/09;C05C9/00;C08K3/34 |
主分类号 |
C05G3/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for preparing a slow-release fertilizer comprising the steps of:
a) dissolving lignin, alkenylsuccinic anhydride, stearic acid and PEG-2000 in a solvent heated to 50-100° C.; b) forming a coating on the surface of urea granules using the solution obtained in step a) and drying; c) immersing the coated granules obtained in step b) in alkenylsuccinic anhydride; d) adsorbing kaolin onto the surface of the coated granules, wherein the coating materials are 20-80% of the total weight of the coated granules. |
| 地址 |
Helsinki FI |
