Himanshu Labhshanker Joshi

Title: Innovations of Himanshu Labhshanker Joshi

Introduction

Himanshu Labhshanker Joshi is a notable inventor based in Bhavnagar, India. He has made significant contributions to the field of chemical engineering, particularly in the production of various chemical compounds. With a total of 8 patents to his name, his work has had a considerable impact on industrial processes.

Latest Patents

One of his latest patents is a process for the simultaneous production of potassium sulphate, ammonium sulfate, magnesium hydroxide, and/or magnesium oxide from kainite mixed salt and ammonia. In this innovative process, kainite mixed salt is treated with water to obtain solid schoenite and a schoenite end liquor. The end liquor is desulphated using recycled calcium chloride and evaporated to obtain camallite crystals, from which potassium chloride is recovered. Gypsum produced during desulphatation is reacted with aqueous ammonia and carbon dioxide to produce ammonium sulfate and calcium carbonate. The calcium carbonate is then calcined to obtain calcium oxide, which is slaked and reacted with the magnesium chloride-rich liquor to produce a slurry of magnesium hydroxide. This slurry can be surface modified and calcined to produce magnesium oxide. Additionally, the schoenite and potassium chloride are reacted to produce solid sulphate of potash.

Another significant patent by Joshi is for the preparation of high-purity magnesium oxide (MgO) from salt bitterns. This process involves the intermediate formation of magnesium hydroxide obtained from the reaction of magnesium chloride and lime. The magnesium chloride is first reacted with ammonia in an aqueous medium, and the resulting slurry is filtered. The filtrate, containing ammonium chloride, is treated with lime to regenerate ammonia while transforming lime into calcium chloride, which is used for desulphatation of bittern to recover carnallite and magnesium chloride of the desired quality. The crude magnesium hydroxide is then dried and calcined to produce pure magnesium oxide.

Career Highlights

Himanshu Labhshanker Joshi is associated with the Council of Scientific & Industrial Research, where he has been instrumental in advancing research in chemical processes. His innovative approaches have led to the development of efficient methods for producing essential chemical compounds.

Collaborations

Throughout his career, Joshi has collaborated with several esteemed colleagues, including Pushpito