Rustam H Sethna

Title: Innovations in Wood Pulp Production: The Contributions of Rustam H Sethna

Introduction

Rustam H Sethna, an accomplished inventor located in New Brunswick, NJ, has made significant advancements in the field of wood pulp production. With a total of nine patents to his name, Sethna's work focuses on optimizing bleaching methods to enhance sustainability and efficiency in the pulp and paper industry.

Latest Patents

Among his most recent innovations is a sophisticated pulp bleaching method that effectively scrubs ozone bleaching waste streams to create an oxygen-containing stream. This process involves the digestion of wood chips in polysulfide liquor to produce brown stock pulp, which is subsequently washed to generate washed brown stock wood pulp alongside weak black liquor. The washed pulp undergoes delignification in an oxygen delignification stage, producing oxygen delignified wood pulp.

Further enhancing the bleaching process, the delignified wood pulp is subjected to ozone bleaching, yielding a waste stream rich in ozone, carbon dioxide, and oxygen. Notably, Sethna’s method introduces an extractive oxidation stage, which may include the use of peroxide for additional bleaching. The recovery of the waste stream, followed by scrubbing with white liquor or oxidized white liquor, plays a crucial role in removing ozone and carbon dioxide. This innovative approach eliminates the need for ozone destruct units, streamlining the overall process further.

Another standout patent focuses on producing oxidized white liquor using dregs containing carbon, effectively recycling waste materials. The utilization of dregs, a byproduct separated from green liquor, enhances the oxidation of white liquor, confirming Sethna’s commitment to sustainability and innovation within the industry.

Career Highlights

Rustam H Sethna is affiliated with The Boc Group, Inc., where he has been instrumental in advancing ideas that address environmental challenges in the pulp production sector. His expertise has contributed to the development of solutions that not only improve production efficiency but also reduce environmental impact.

Collaborations

Throughout his career, Sethna has collaborated with notable professionals such as Mark J Kirschner and Atul M Athalye. These partnerships highlight the importance of teamwork and collective expertise in driving forward-thinking innovations in the field of wood pulp production.

Conclusion

Rustam H Sethna's work exemplifies a profound commitment to innovation in wood pulp production, demonstrating how inventive methods can lead to both technological advancements and sustainable practices. His contributions not only enhance the efficiency of pulp bleaching methods but also reflect a growing awareness of environmental responsibility in industrial processes.