Patents by Inventor Eskild Kyhn

Eskild Kyhn has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process and apparatus for modification of lignocellulosic materials and products of modified lignocellulosic materials obtained by the process
    Patent number: 9091022
    Abstract: A process and apparatus for the preparation of a modified lignocellulosic material by treating the lignocellulosic material in a first activator zone having an atmosphere of one or more acid anhydrides in vapour form in a gas at a gauge pressure of 0-50 kPag and a temperature of 100-160° C., and then treating the lignocellulosic material in a second reactor zone having an atmosphere of a gas at a gauge pressure of 0-50 kPag and a temperature of 120-190° C., thereafter stripping the lignocellulosic material with steam or water in a stripper zone, and optionally further processing. The process is more efficient as compared with the prior art processes by providing a better access of the acid anhydrides to the sites of the reactive lignocellulosic hydroxyl groups (—OH), which are located on the internal surfaces of pores and capillary channels in the lignocellulose. Furthermore, the apparatus is relatively simple.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: July 28, 2015
    Assignee: Danish Plant Fibre Technologies Holding A/S
    Inventors: Per Berre Eriksen, Peter Larsen, Eskild Kyhn