Zhengzheng Zhang

Title: Innovations of Zhengzheng Zhang in Nickel and Cobalt Separation

Introduction

Zhengzheng Zhang is a notable inventor based in Beijing, China. He has made significant contributions to the field of materials science, particularly in the efficient separation of nickel and cobalt from solutions. His innovative methods are crucial for recycling and resource recovery from waste materials.

Latest Patents

Zhengzheng Zhang holds a patent for a method titled "Method for separating nickel and cobalt from a solution." This method involves several steps, including obtaining a solution containing nickel and cobalt through acid leaching of a cathode material from waste lithium-ion batteries. The process adjusts the pH of the solution to between 3.5 and 4.5 and incorporates extractants for effective separation. The cobalt is extracted into the organic phase while nickel remains in the aqueous phase. This method avoids the use of NaOH as a saponifier, thus preventing the discharge of saponification wastewater. The synergistic action of acidic and alkaline extractants under acidic conditions allows for efficient separation of nickel from cobalt.

Career Highlights

Zhengzheng Zhang is affiliated with the Beijing University of Technology, where he continues to advance his research in materials science and chemical engineering. His work is pivotal in developing sustainable methods for resource recovery, particularly in the context of recycling lithium-ion batteries.

Collaborations

Zhengzheng collaborates with esteemed colleagues, including Xiaoli Xi and Liwen Ma, who contribute to his research endeavors. Their combined expertise enhances the innovative approaches taken in their projects.

Conclusion

Zhengzheng Zhang's contributions to the field of nickel and cobalt separation highlight the importance of innovation in sustainable practices. His patented method not only improves efficiency but also addresses environmental concerns associated with waste management.