Document Detail


Pulping cardoon (Cynara cardunculus) with peroxyformic acid (MILOX) in one single stage.
MedLine Citation:
PMID:  18039568     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In this work, depithed cardoon stalk (Cynara cardunculus) has been used with the objective of obtaining bleachable pulps. The material, once properly prepared, was subjected to one-step peroxyformic acid delignification. In order to study the process, a face-centred second order factorial design was developed which allowed the determination of the influences of four variables: concentrations of formic acid and hydrogen peroxide in the cooking liquor and the time and temperature of the treatment. Empirical mathematical models have been obtained which predict the yield, kappa index, residual lignin content, and viscosity of the pulps. These models demonstrate that in general the delignification was extensive, producing pulps with kappa indexes less than 25 in the majority of cases, with good yields in the range of 45-60%. However, the pulps seem to have been degraded in the reaction media, as can be deduced from the low viscosity values found: 260-520 mL/g.
Authors:
P Ligero; J J Villaverde; A Vega; M Bao
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-11-26
Journal Detail:
Title:  Bioresource technology     Volume:  99     ISSN:  0960-8524     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2008 Sep 
Date Detail:
Created Date:  2008-05-12     Completed Date:  2008-08-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  5687-93     Citation Subset:  IM    
Affiliation:
Department of Physical Chemistry and Chemical Engineering, University of A Coruña, Campus da Zapateira s/n, 15071 A Coruña, Spain.
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MeSH Terms
Descriptor/Qualifier:
Cellulose
Conservation of Natural Resources
Cynara / chemistry*
Factor Analysis, Statistical
Formic Acids*
Lignin / chemistry
Paper
Temperature
Chemical
Reg. No./Substance:
0/Formic Acids; 107-32-4/peroxyformic acid; 9004-34-6/Cellulose; 9005-53-2/Lignin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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