John W Wen

Title: Innovations and Contributions of John W Wen

Introduction

John W Wen is a notable inventor based in Baton Rouge, LA, with a significant contribution to the field of chemical engineering. He holds four patents that showcase his innovative approaches to solving complex industrial problems. His work primarily focuses on the production and processing of phosphoric acid and sulfur recovery.

Latest Patents

One of his latest patents is the "Removal of aluminum contamination during production of phosphoric acid." This invention provides a method for removing aluminum contamination from phosphoric acid during the acidulation of phosphate rock with sulfuric acid in the presence of recycled phosphoric acid. The method involves the addition of acid-soluble silica to the acidulation slurry and maintaining the molar ratio of non-fluosilicate fluoride to aluminum in the liquid phase between 2.5 and 5.0. These conditions favor the precipitation of aluminum as calcium tetrafluoaluminate dihydrate, enabling the co-removal of this compound by filtration with by-product gypsum. This invention is particularly suitable for processing phosphate rocks with high iron and aluminum contents, such as those occurring in Sri Lanka.

Another significant patent is the "Sulfur recovery process." This process recovers sulfur from sulfur-bearing ores using an aqueous leaching solution containing calcium monosulfide and calcium hydrosulfide. The sulfur ore is contacted in an extraction zone with the leaching solution under conditions that solubilize sulfur from the ore in the form of calcium polysulfide. The extraction step is preferably carried out at an elevated temperature. The loaded leaching solution is then recovered and applied to a sulfur-production zone, where it reacts with hydrogen sulfide to produce calcium hydrosulfide and elemental sulfur. The calcium hydrosulfide solution is recycled for use in the sulfur extraction zone.

Career Highlights

Throughout his career, John W Wen has worked with prominent companies such as Agrico Chemical Company and Freeport McMoRan Resource Partners. His experience in these organizations has contributed to his expertise in chemical processes and innovations.

Collaborations

John has collaborated with notable individuals in his field, including Charles W Weston and Frederick S Mandel. These collaborations have likely enriched his work and led to further advancements in his inventions.

Conclusion

John W Wen's contributions to the field of chemical engineering through his patents demonstrate his innovative spirit and commitment to solving industrial challenges. His work continues to