Simplified Pulping and Bleaching of Corn Stalks
By Dr. Med Byrd, Dept. of Wood & Paper Science, North Carolina State University and Robert W. Hurter, P. Eng., MBA, President, HurterConsult Incorporated
Presented at the Pulp and Paper Technical Association of Canada (PAPTAC) 91st Annual Meeting - February 8, 2005.
Abstract
A simplified 3 to 4 stage process has been developed to produce fully-bleached pulps from corn stalks. The process consists of a mild alkaline extraction, followed by acidification, ozonation, and final bleaching. The ozone stage serves as a chemical depithing stage and permits free-draining pulps to be produced without mechanical depithing. In this paper, preliminary data are shown for trails on US corn stalks. Strength properties of handsheets from corn stalks pulps were compared to those for southern hardwoods.
The PowerPoint presentation of the paper in PDF format can be downloaded at the following link:
(requires Adobe Reader).Dr. Byrd and Mr. Hurter were granted United States Patent 6,302,997 - Process for producing a pulp suitable for papermaking from nonwood fibrous materials (2001) for this process. Patent protection is being processed for the European Union, Canada, Mexico, India, China and other countries.
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