Weijian Li

Title: Weijian Li: Innovator in Vitamin B1 Preparation

Introduction

Weijian Li is a notable inventor based in Shanghai, China. He has made significant contributions to the field of chemistry, particularly in the preparation of essential vitamins. His innovative methods have the potential to enhance the efficiency of vitamin production.

Latest Patents

Weijian Li holds a patent for a full continuous-flow preparation method of vitamin B1. This method involves several key steps: First, 3-chloro-4-oxopentyl acetate, 2-methyl-4-amino-5-(aminomethyl) pyrimidine, and carbon disulfide are fed into a first continuous-flow reactor for addition. Next, the reaction mixture flows into a first continuous filtration and reaction device to collect a filter cake. The filter cake is then subjected to cyclization with hydrochloric acid solution. Following this, the reaction mixture and an aqueous inorganic base solution are transported to a micromixer and a second continuous-flow reactor for hydrolysis to obtain thiothiamine. The thiothiamine is then moved to a third continuous-flow reactor with hydrogen peroxide for oxidation to produce thiamine sulfate. Finally, the thiamine sulfate enters a second continuous filtration and reaction device for filtration, where it is collected as a filter cake. This cake is then reacted with an organic hydrochloric acid solution, followed by filtration and drying to yield vitamin B.

Career Highlights

Weijian Li is affiliated with Fudan University, where he conducts research and develops innovative methods in the field of chemistry. His work has garnered attention for its practical applications in vitamin production.

Collaborations

Weijian Li collaborates with several colleagues, including Fener Chen and Meifen Jiang. Their combined expertise contributes to advancements in their research projects.

Conclusion

Weijian Li's contributions to the preparation of vitamin B1 through innovative methods highlight his role as a significant inventor in the field. His work not only advances scientific knowledge but also has practical implications for the production of essential nutrients.