Sanna Lehto

Title: Sanna Lehto: Inventor in Cellulose Chemistry

Introduction

Sanna Lehto is an inventor based in Espoo, Finland, whose patent work concerns the production of cationized cellulose. She is associated with Kemira Oyj and is identified as a woman.

Latest Patents

Lehto is credited with 1 patent, titled “Method for Producing Cationized Cellulose and Cationized Cellulose.” The invention describes preparing a concentrated slurry of cellulosic starting material in an alkaline liquid medium containing an organic liquid, then mercerizing the slurry. After mercerization, a cationizing agent is added at a temperature below the medium’s boiling point, allowing the cellulose to react and form a cationized cellulose product. The reaction may be carried out under an inert atmosphere.

Career Highlights

Lehto’s listed patent highlights work on a method for producing cationized cellulose. The disclosed process uses a cellulosic starting-material concentration of at least 20 weight percent, calculated on a dry basis relative to the total weight of the liquid medium and starting material.

Collaborations

Lehto’s listed coworkers include Veli-Matti Vuorenpalo and Jonni Ahlgren. Her company affiliation is Kemira Oyj.

Conclusion

Sanna Lehto’s patent focuses on a process for producing cationized cellulose through alkaline slurry preparation, mercerization, and a subsequent cationization reaction.