C - Chemistry – Metallurgy – 07 – G
Patent
C - Chemistry, Metallurgy
07
G
260/120
C07G 3/00 (2006.01)
Patent
CA 1285555
ABSTRACT OF THE DISCLOSURE A method for producing a relatively low viscosity tannin extract from bark and/or wood and suitable for use in formaldehyde-condensation adhesives comprises providing tannin extract obtained from bark and/or wood, separating from the tannin extract the high molecular weight material, subjecting the high molecular weight material to treatment with one or more sulphite compounds to reduce the molecular weight and recombining the sulphited material with the tannin extract. The tannin extract may be recovered by subjecting bark and/or wood to a first stage hot aqueous tannin extraction process, thereby obtaining a first stage tannin extract, subjecting the extracted bark and/or wood to a second stage hot aqueous extraction process at a higher pH than the first stage, thereby obtaining a second stage tannin extract, and optionally recombining the first and second stage tannin extracts.
558669
Collins Peter James
Yazaki Yoshikazu
Commonwealth Scientific And Industrial Research Organisation
Fetherstonhaugh & Co.
LandOfFree
Tannin extraction and processing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tannin extraction and processing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tannin extraction and processing will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1286470