Company Filing History:
Years Active: 1982
Title: Innovations of John W. Wagner
Introduction
John W. Wagner is a notable inventor based in Petersburg, VA (US). He has made significant contributions to the field of polymer chemistry, particularly in the recovery and preparation of nylon 6. With a total of 2 patents, his work has had a considerable impact on the industry.
Latest Patents
Wagner's latest patents include innovative methods for the recovery of caprolactam from nylon 6 oligomers. This invention outlines a process to recover caprolactam from concentrated nylon 6 chip wash water, which contains water, cyclic oligomer, and caprolactam. The method involves using a wiped-film evaporator operated at temperatures ranging from about 200°C to 300°C and pressures between about 10 to 250 Torr. This process effectively separates the wash water into an overhead stream of water and caprolactam, and a bottom stream of caprolactam and cyclic oligomers. Additionally, the caprolactam in the bottom stream can also be recovered, and the cyclic oligomers can be depolymerized to caprolactam for recovery.
Another significant patent is a two-stage hydrolysis process for the preparation of nylon 6. This process involves polymerizing epsilon-caprolactam through a first stage at temperatures of about 180°C to 260°C and pressures of 20 to 150 psig for a duration of about 0.5 to 4 hours. Before equilibrium conditions are reached, a second stage occurs at temperatures of about 200°C to 260°C and pressures of about 100 to 900 Torr for about 2 to 15 hours. This method ensures that water is continuously removed during both hydrolyzation and subsequent polycondensation, resulting in a shaped polymer article with a cyclic dimer content below 0.2 percent by weight.
Career Highlights
John W. Wagner is associated with Allied Corporation, where he has been able to apply his innovative ideas and research. His work has contributed to advancements in polymer technology and has been recognized within the industry.
Collaborations
Wagner has collaborated with notable coworkers such as Lamberto Crescentini and Webb B. Blackman, Jr. Their combined expertise has furthered the development of innovative solutions in polymer chemistry.
Conclusion
John W. Wagner's contributions
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