Sulphur Coated Urea Process and

Production

 

Kourosh Akhlaghi*

E-mail: [e-mail]

 

 

 

Abstract

 

      Sulfur Coated Urea (SCU) as a kind of slow release fertilizer with high efficiency and good response for plants is used widely in modern agricultural industries. Unfortunately Urea as fertilizer has low efficiency, high loss, high emission of soil and water resources with nitrate and nitrite, reduction of micronutrients absorption in high pH soils with plants and etc.

Thus using of sulfur coated urea as a suitable and new fertilizer in the whole agricultural crops is recommended specially for rice fields by agricultural research institute. Also sulfur as a vital substance in protein structure and plant organs, reduction of soil pH and preparing good condition for iron and zinc absorption by plant that our country has iron and zinc deficiency, has an important rule.

    In this paper based on researches that were done in laboratory and pilot plant, we could produced different kind of sulfur coated urea samples. Deep investigation of the process and finding important parameters of this process were done. Based on these researches important parameters that affect on nitrogen dissolution rate were determined. Also different type of sealants were prepared and tested first in the laboratory and then in pilot plant.   

 

Key words: SCU, sulfur coated urea, sulfur, sulphur, urea, sealants, slow release fertilizer, controlled-release fertilizers , coated/encapsulated fertilizers, Sulphur Coated Fertilizer, Polymer Coated Fertilizer, Polymer/Sulphur Coated Fertilizer, slow release fertilizer / controlled release fertilizer (SRF/CRF),Timed release , Step release, sulfur coated fertilizer,sulphur coated urea, condensation products, UF, IBDU ,CDU.