Donald L Stewart, Jr

Title: Innovations by Donald L Stewart, Jr.

Introduction

Donald L Stewart, Jr. is an accomplished inventor based in Hempfield Township, PA (US). He has made significant contributions to the field of aluminum recovery, holding a total of 3 patents. His innovative processes focus on enhancing the efficiency of aluminum reclamation from secondary materials.

Latest Patents

One of his latest patents is titled "Process for the recovery of values from secondary aluminum dross." This process involves treating aluminum dross with leach water to dissolve the salt content, with magnesium chloride added to maintain a pH range of about 7-8.5. This approach reduces ammonia production during treatment and enhances the recovery of metallic aluminum.

Another notable patent is the "Continuous salt-based melting process." This continuous process is designed for melting and reclaiming aluminum from scrap containing impurities. It includes heating a molten salt, mixing it with aluminum scrap, and separating aluminum from impurities. The process also involves chlorinating a portion of the charge mixture to form a chlorinated salt mixture and metal chlorides, which are then removed and recycled back into the process.

Career Highlights

Donald L Stewart, Jr. is associated with the Aluminum Company of America, where he applies his expertise in aluminum recovery technologies. His work has contributed to advancements in sustainable practices within the aluminum industry.

Collaborations

He has collaborated with notable coworkers such as Jan H VanLinden and Daniel Yerushalmi, further enhancing the innovative efforts within his field.

Conclusion

Donald L Stewart, Jr. continues to be a pivotal figure in the aluminum recovery sector, with his patents reflecting a commitment to innovation and sustainability. His contributions are vital for the advancement of efficient aluminum reclamation processes.