US2005022951A1PendingUtilityA1

Total chlorine free bleaching of arundo donax pulp

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Assignee: NILE FIBER PULP & PAPER INCPriority: Jun 17, 1998Filed: Aug 25, 2004Published: Feb 3, 2005
Est. expiryJun 17, 2018(expired)· nominal 20-yr term from priority
Inventors:Ernett EltheimerMichael E. Jackson
B27J 1/00D21C 9/1057B27L 11/02B27L 11/08D21B 1/00D21C 5/00
42
PatentIndex Score
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Claims

Abstract

Composite panels and pulp, and paper products of the pulp, are produced from Arundo donax . In the fabrication of the composite panels, Arundo donax is comminuted to a suitable size, combined with a binder, and consolidated into panels that meet standards for construction and/or furniture grade panels. The Arundo donax particulates may be combined with wood particulates to produce a mixed furnish that can be used in the preparation of composite panels. Comminuted Arundo donax is treated, in conventional pulping processes, to produce a high tensile strength pulp that can be used in the production of paper. The pulp has a lighter color than wood pulp, and thereby uses less bleaching chemicals to achieve a desired whiteness. The pulp can be combined with wood pulp to produce a variety of products.

Claims

exact text as granted — not AI-modified
1 . A method for forming bleached  Arundo donax  pulp, comprising: 
 (a) subjecting a furnish comprising  Arundo donax  particles to a pulping process to provide  Arundo donax  pulp; and    (b) bleaching the  Arundo donax  pulp by a total chlorine free process to provide a bleached pulp, wherein bleached pulp has a brightness of at least about 60% ISO.    
     
     
         2 . The method of  claim 1 , wherein bleaching comprises the sequence: O(Q)-Eop-P-P-P.  
     
     
         3 . The method of  claim 1 , wherein bleaching comprises the sequence: O(Q)-Eop-P-Pp-P.  
     
     
         4 . The method of  claim 1 , wherein bleaching comprises the sequence: O-A-P-P-P.  
     
     
         5 . The method of  claim 1 , wherein bleaching comprises the sequence: O-Eop-P-Q-P-P.  
     
     
         6 . The method of  claim 1 , wherein bleaching comprises the sequence: O-Eop-Q-P-P-P.  
     
     
         7 . The method of  claim 1 , wherein bleaching comprises the sequence: O-Q-Eop-P-P-P.  
     
     
         8 . The method of  claim 1 , wherein bleaching comprises the sequence: O(Q)-Eop-P-P-P.  
     
     
         9 . Total chlorine free bleached  Arundo donax  pulp.  
     
     
         10 . The method of  claim 1 , wherein the bleached pulp has a brightness of at least about 70% ISO.  
     
     
         11 . The method of  claim 1 , wherein the bleached pulp has a brightness of at least about 85% ISO.  
     
     
         12 . A method for forming bleached  Arundo donax  pulp, comprising: 
 (a) subjecting a furnish comprising  Arundo donax  particles to a pulping process to provide  Arundo donax  pulp, wherein the pulping process comprises cooking the furnish using an H-factor of about 850; and    (b) bleaching the  Arundo donax  pulp by a total chlorine free process to provide a bleached pulp.    
     
     
         13 . The method of  claim 12 , wherein the bleached pulp has a brightness of at least about 60% ISO.  
     
     
         14 . The method of  claim 12 , wherein the bleached pulp has a brightness of at least about 70% ISO.  
     
     
         15 . The method of  claim 12 , wherein the bleached pulp has a brightness of at least about 85% ISO.

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