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Method of making controlled release fertilizer particles
专利权人:
Stamicarbon B.V.
发明人:
Stefan Hendrikus Schaafsma
申请号:
US14354125
公开号:
US09120709B2
申请日:
2012.10.24
申请国别(地区):
US
年份:
2015
代理人:
摘要:
The invention pertains to a method of making urea-containing particles wherein with a lower degree of cooling, high mechanical strengths are obtained. The method comprises the steps of (a) providing a first polymer 10 layer; (b) feeding urea droplets onto said first polymer layer, (c) cooling the droplets provided on the first polymer layer to a temperature between 55° C. and 120° C.; (d) applying a second polymer layer onto the first polymer layer comprising the droplets so as to form encapsulated urea droplets; and (e) separating the encapsulated urea droplets.
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