Company Filing History:
Years Active: 1978
Title: Wavell F Cowan: Innovator in Solvent Pulping Process
Introduction
Wavell F Cowan is a notable inventor based in Montreal, Canada. He has made significant contributions to the field of pulp processing, particularly through his innovative approaches to solvent pulping. His work has implications for the efficiency and sustainability of wood processing.
Latest Patents
Cowan holds a patent for a solvent pulping process. This process involves the solvent pulping of wood chips or other fibrous plant material using an aqueous solution of a lower aliphatic alcohol in multiple batch extraction vessels. The method includes rapidly heating the charge in each vessel to pulping temperature by recirculating a primary extraction liquor with a high dissolved solids content. Following this, the charge undergoes a series of once-through extractions or washes with progressively cleaner liquors, culminating in a final extraction with fresh liquor. The extraction liquor from one stage is utilized in another, enhancing efficiency. After extraction, the liquor is drained, and the remaining solvent is recovered through steam stripping. The used extraction liquor is treated in an alcohol recovery system, leading to the recovery of a concentrated aqueous lignin suspension and a concentrated aqueous carbohydrate solution.
Career Highlights
Cowan is associated with C P Associates Limited, where he has applied his expertise in solvent pulping. His innovative methods have contributed to advancements in the processing of fibrous materials, showcasing his commitment to improving industrial practices.
Collaborations
Cowan has worked alongside notable colleagues, including Vincent B Diebold and John K Walsh. Their collaborative efforts have likely fostered an environment of innovation and shared knowledge in their field.
Conclusion
Wavell F Cowan's contributions to the solvent pulping process highlight his role as an innovator in the field of wood processing. His patent reflects a significant advancement in the efficiency of extracting valuable materials from fibrous plant sources.