公开(公告)号：WO2019197041A1

公开(公告)日：2019-10-17

申请号：PCT/EP2018/059562

申请日：2018-04-13

Applicant: TRICOYA TECHNOLOGIES LTD

Inventor： KAPPEN, Theodorus Gerardus Marinus Maria ,  VAN DOMMELE, Stefan ,  PRATT, Edward James

IPC: B27K3/02 ,  B27K3/34 ,  C08H8/00 ,  B01D11/02

Abstract: Disclosed is a process for the acetylation of wood. The wood to be acetylated is first subjected to an extraction step. The resulting extracted wood particularly has a reduced hemicellulose content. This extracted wood is subjected to contact with an acetylation agent. The extraction can be done with an extraction fluid which is, e.g., water, acetone, ethanol, methanol, or acetic acid. The water can be pure water, such as tap water or demineralised water, or it can be a dilute salt solutions (e.g. water containing ammonium oxalate or sodium sulphite). Hot water extraction is preferred. The resulting acetylated extracted wood, particularly wood elements, have a desirable swelling behaviour at lower acetyl contents than conventional acetylated wood. The wood can be in the form of wood elements, solid wood, or wood veneers.