Maro Publications

Lignin

Patent Abstracts

*10/29/2013 
from
10/16/2012

Maro Topics

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Patents Abstracts

3. 8,409,403 
Production of amino lignin and amino lignin cellulose resins and adhesives 

The use of amino compounds reacted with aldehydes is well know in the Art to produce aminoplasts for use as an adhesive and resins but the aminoplasts will not produce delignification of the lignin from lignin cellulose plants. The novel process of this invention to produce delignification of lignin cellulose plants and produce amino lignin, amino cellulose and amino lignin cellulose, hemi-cellulose, carbohydrates and other products by the use of amino compounds in an aqueous solution as the delignification compounds is novel. Urea, guanidine compounds or combination urea and other amino compounds when heated in an aqueous solution containing particles of lignin cellulose it produces a delignification of the lignin from the lignin cellulose by the urea reacts with lignin and with some of the amino compound is reacted with the lignin attached to the lignin cellulose to produce amino lignin cellulose and amino cellulose

Blount, California, developed flame retardant and water resistant products  from bio-based materials such as lignin cellulose containing materials.  The lignin cellulose materials are modified by the method of delignification.  The method of this invention utilizes an amino compound in an aqueous solution to react with the lignin in the lignin cellulose and the amino lignin and freed lignin becomes water soluble.  The amino compound also reacts with the non-water soluble lignin still attached to the cellulose and also to the cellulose that is produced. Other products are produced in this method such as carbohydrates, hemi-cellulose, rosins, waxes, alcohols and other products.  The amino lignin, lignin, amino lignin and amino cellulose is reacted with many organic and inorganic compounds such as aldehydes, polyisocyanates, epoxies, polycarboxylic acids, vegetable oils and many other compounds to produce resins and adhesives which may be used to produce products such as molded products, particleboard, plywood, ABS, etc. which are flame retardant and water resistant.

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2. Lignin as a Renewable Resource

U.S. Patent 8,409,403 (April 2, 2013),”Production of Amino Lignin and Amino Lignin Cellulose Resins and Adhesives,” David H. Blount (San Diego, California, USA).

Lignin is a major part of much plant material and has not been very useful in commercial materials.  Blount developed flame retardant and water resistant products from lignin cellulose materials.  He used aqueous amino compounds to react with and extract the lignin in plant materials.  The freed lignin becomes water soluble.  Other products are produced in this method such as carbohydrates, hemi-cellulose, rosins, waxes and alcohols.  The amino lignin, lignin, and amino cellulose is reacted with organic and inorganic compounds such as aldehydes, polyisocyanates, epoxies, polycarboxylic acids, and vegetable oils to produce resins and adhesives which may be used to produce products such as molded products, particleboard and plywood which are flame retardant and water resistant.

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1. 8,288,460 
Derivatives of native lignin from hardwood feedstocks
 
Balakshin et al of Lignol Innovations Ltd., California, extracted  hardwood lignin derivatives having an aliphatic hydroxyl content of from about 5.2 mmol/g to about 7 mmol/g lignin.  The lignin derivatives have a desired antioxidant activity characterized by the normalized radical scavenging index (RSI). This material can be used as antioxidant in polymeric materials.  (RDC 11/1/2012)

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Interested!!
Bookmark this page to follow future developments!.
(RDC 6/5/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921
E-Mail: cornelrd@bee.net  

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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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** Date of latest addition; date of first entry is 10/16/2012.