Quick Menu

Upcoming Journals

Asian Journal of Chemical Sciences

Asian Journal of Chemical Sciences, 2456-7795,Vol.: 4, Issue.: 2


Laboratory Bleaching System for Oxygen and Ozone Bleaching


Klaus Dölle1* and Adrian Honig1

1Department of Paper and Bioprocess Engineering (PBE), College of Environmental Science and Forestry (ESF), State University of New York (SUNY), One Forestry Drive, Syracuse, NY 13210, USA.


Article Information


(1) Fahmida Khan, National Institute of Technology Raipur, Chhattisgarh, India.


(1) Tamara Llano Astuy, Spain.

(2) Thompson Emeka Nwankwere, Kampala International University, Uganda.

Complete Peer review History: http://www.sciencedomain.org/review-history/24144




A multi-functional bleaching equipment for laboratory use was developed. The setup allowed the bleaching of four pulp samples at the same time. The bleaching setup works for traditional oxygen and ozone bleaching, using caustic soda and calcium hydroxides as bleaching additive. This newly developed setup allows creating the tests as flexible as possible, for multiple wood fiber-based pulps. The installation work to change from chemical to gas bleaching can be done in a couple of minutes. The new trial setup showed improvements for the second and third bleaching stage using oxygen and ozone gas. For Kraft pulp using caustic soda as bleaching agent the Kappa number could be reduced by over 97.8%. Calcium hydroxide as bleaching agent resulted in a reduction of 90.0%. Both bleaching agents allowed an increase in L* brightness and tensile index of up to 74.1% and 80.1%% respectively for caustic soda and 17.6% and 80.1% respectively for calcium hydroxide as bleaching agent. For straw and coffee filter pulp an increase in L* brightness of up to 58.6% and an increase of the tensile index of up to 67.0% could be achieved without using bleaching agents. Recycled pulp showed an increase in tensile index of up to 71.5% but a decrease of 1% for the L* brightness. 


Keywords :

Laboratory bleaching system; ozone bleaching; oxygen bleaching; delignification; pulp bleaching.


Full Article - PDF    Page 1-12    Article Metrics


DOI : 10.9734/AJOCS/2018/40620

Review History    Comments

Search this site

Advanced Search

Announcement & News

Nature (Impact Factor: 41.6) confirmed high standard of SDI journal and its editors

We are happy to inform that Nature (Impact Factor: 41.6) confirmed high standard of SDI journal and ...

ISI Thomson Reuters selected British Journal of Pharmaceutical Research for Emerging Sources Citation Index

We are delighted to inform that ISI Thomson Reuters selected British Journal of Pharmaceutical Resea...

SCOPUS selected Annual Research & Review in Biology (ARRB)

We are delighted to inform that famous indexing organization SCOPUS (from Elsevier) selected  A...

Index Copernicus Evaluation Result Released

We are delighted to inform that Index Copernicus (a leading indexing organization from Pol...

Journal Repository (JR): Permanent Digital Archiving of SDI journals

SDI is happy to announce that all our journals are now permanently archived in Journal Repository (J...

SDI journal got 35th ranking in Publons

We are delighted to announce (as of 04/01/2016) that British Journal of Medicine and Medical Re...

Growth of SDI and world publication market

As of 2014, total 25,064 journals are competing in World market of journal publication. In 2011, tot...

Science (IF: 31) report confirmed the high standard of SDI journal

As per a recent report (Link) of Science journal (present Impact factor 31), one of our journal (Bri...

SDI introduced Post-publication peer review by its comment section

SDI journals encourage Post-publication peer review by its comment section   Policy details a...

SDI promotes transparent Advanced OPEN peer review

We have migrated to transparent and toughest ‘Advanced OPEN peer review’ system (...


  • No Awards listed.

Browser Compatibility : Mozila firefox, Google Crome and IE 7 & above. Creative Commons License Terms & Condition   |   Privacy Policy   |   Join Us   |   Help   |   Contact Us
© Copyright 2010-2018, SCIENCEDOMAIN international. All rights reserved.