Keiji Hasegawa

Title: Keiji Hasegawa: Innovator in Metal Recovery and Waste Management

Introduction

Keiji Hasegawa is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the fields of metal recovery and waste management, holding a total of 2 patents. His innovative approaches aim to enhance the efficiency of resource recovery from various waste streams.

Latest Patents

Hasegawa's latest patents include a "Metal-collecting apparatus and method for elution and recovery of metal from metal-collecting material." This invention focuses on providing a structure for a metal collecting material that can be used in seawater, river water, or industrial wastewater. The goal is to achieve excellent adsorption efficiency while minimizing waste generation. The process involves several steps, including contacting the metal collecting material with a dilute eluent and then with a more concentrated eluent to recover valuable metals.

Another significant patent is the "Method for concentrating black liquor with oxidizing." This invention addresses the concentration of alkaline waste liquor, known as black liquor, which is discharged during the Kraft cooking of wood fibers. By adding CO₂ gas to the waste liquor, the method aims to recover cooking chemicals while improving the efficiency of the concentration process.

Career Highlights

Throughout his career, Hasegawa has worked with prominent organizations such as the Research Association of Pulp and Paper Technology and Ebara Corporation. His work has focused on developing innovative solutions for environmental challenges, particularly in the areas of waste management and resource recovery.

Collaborations

Hasegawa has collaborated with notable colleagues, including Akira Shimokura and Shuichi Nagato. These partnerships have contributed to the advancement of his research and the successful development of his patented technologies.

Conclusion

Keiji Hasegawa's contributions to metal recovery and waste management demonstrate his commitment to innovation and environmental sustainability. His patents reflect a deep understanding of the challenges in these fields and offer practical solutions for improving resource efficiency.