Cookies Policy
X

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Catalyzed Sulphite and Semichemical Pulping

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

This Article is currently unavailable for purchase.
Add to Favorites
You must be logged in to use this functionality

Cover image Placeholder

Very high yield sulphite pulps were produced by cooking black spruce wafers in pulping liquors at pH 7 or 10, containing 0.1% (on O.D. wood) of soluble anthraquinone (SAQ). These pulps had better strength properties relative to controls prepared without SAQ, breaking length and burst index being greater, on average, by 20%. Other improvements included: increased pulping rate, lower lignin contents at comparable pulp yields, and higher carbohydrate content at the same level of residual lignin in pulp (this resulted in an increase of total pulp yield by 2%). Results of cooks in liquors ranging in pH from 4 to 10, and under variable conditions of time (20-60 min) and temperature (120-160°C) suggested that: firstly, AQ does not act as a pulping catalyst at pH 4, and secondly, the sulphonate contents of AQ-catalyzed pulps are lower than those of the uncatalyzed controls. In the light of the lower sulphonate content, the higher strength is unexpected.

Affiliations: 1: Chemical Engineering Department of McGill University, McGill Pulp and Paper Research Centre, Pulp and Paper Research Institute of Canada, 3420 University St., Montreal, Province Quebec, H3A 2A 7

10.1163/156856795X00387
/content/journals/10.1163/156856795x00387
dcterms_title,pub_keyword,dcterms_description,pub_author
10
5
Loading
Loading

Full text loading...

/content/journals/10.1163/156856795x00387
Loading

Data & Media loading...

http://brill.metastore.ingenta.com/content/journals/10.1163/156856795x00387
Loading

Article metrics loading...

/content/journals/10.1163/156856795x00387
2017-10-24

Sign-in

Can't access your account?
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation