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Solar desalination Researchers at Rice University (Houston, Tex.; www.rice.edu) working…
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Chementator Briefs

By Edited by Gerald Ondrey |

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Urea + sulfur Building on years of joint experience in the field of sulfur granulation, Sandvik Process Systems (Fellbach, Germany; www.processsystems.sandvik.com) and Shell joined forces and successfully demonstrated the integration of the Shell Thiogro (www.shell.com/sulphur/thiogro) Urea-ES technology and Sandvik Rotoform equipment during a series of continuous plant trials at Sandvik’s productivity center in Fellbach. Shell’s unique technology and the versatility of the Sandvik equipment enabled the production of Shell Urea-ES granules containing up to 70% of finely dispersed elemental sulfur in a urea matrix. In the Sandvik Rotoform System, the homogeneous Shell Urea-ES emulsion is fed to the unit and deposited in the form of drops (2–4-mm dia.) across a steel belt cooler. Water is sprayed against the underside of the solid steel belt, ensuring no cross contamination either to product or to water. As the product moves along the steel belt, the liquid droplets are converted into solid pastilles. The final solid product is collected at the end of the belt and sent to the downstream handling system. One standard Rotoform High Speed unit can produce up to 150 m.t./d of Shell Urea-ES granules. To support industrial deployment,…
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