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Inventor:
Gratzl; Josef S.
Address:
Cary, NC
No. of patents:
4
Patents:












Patent Number Title Of Patent Date Issued
5888787 Selective enzymatic oxidation of aromatic methyl groups to aldehydes by oxygen in the presence o March 30, 1999
A method for oxidation of a pendant methyl moiety on an aromatic ring to the pendant aldehyde moiety is presented. The reaction employs laccase and the diammonium salt of 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid), and is carried out in the presence of oxygen.
5011572 Two stage process for the oxygen delignification of lignocellulosic fibers with peroxide reinfor April 30, 1991
A process is provided for a two-stage oxygen delignification of chemical pulp in which 0.01% to 1% hydrogen peroxide is incorporated into the first and, optionally the second stage. The invention is particularly suitable when the pulp is subsequently bleached with at least one chlorine d
4826568 Process for delignification of cellulosic substances by pretreating with a complexing agent foll May 2, 1989
Process for the delignification of cellulosic substances comprising:a first stage of treatment of cellulosic substances with an acida second stage of treatment with hydrogen peroxide in an alkaline mediuma third stage of digestion in the presence of at least one chemical reactant chosen from sul
4826567 Process for the delignification of cellulosic substances by pretreating with a complexing agent May 2, 1989
Process for the delignification of cellulosic substances comprising:a first stage of treatment of cellulosic substances with an acida second stage of treatment with hydrogen peroxide in an alkaline mediuma third stage of digestion in the presence of at least one chemical reactant chosen from hyd










 
 
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