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Paper Information

Journal:   IRANIAN POLYMER JOURNAL (ENGLISH)   July-August 2004 , Volume 13 , Number 4; Page(s) 275 To 280.
 
Paper: 

BLEACHABILITY OF RICE STRAW ORGANOSOLV PULPS

 
 
Author(s):  POURJOUZI M.*, NAVAEI ARDEH S., MOHAMMADI ROUSHAN DEH J.
 
* Department of Chemical Engineering, Faculty of Engineering, (Pardis-3), University of Tehran, Rezvanshahr, Gilan, I.R. Iran
 
Abstract: 

CEHEP and HEP sequences were used for bleaching of rice straw organosolv pulps and the effects of these sequences were investigated on optical (brightness and opacity) and mechanical (tear index, burst index and breaking length) properties of produced paper sheets. Despite of the significant reduction in mechanical properties, brightness was increased so that it was suitable for writing and printing paper. CEHEP sequence had more increment on brightness and more decrement on mechanical properties than the HEP sequence. The catalytic soda organosolv pulping was used for the pulp production (delignification) from rice straw via batch process at high temperatures and high pressures. The catalytic pulping of rice straw was performed in ethanol-water mixtures (50 and 65% w/w) at various cooking times (150 and 180 min). The ratio of cooking liquor to dry mass of rice straw was 10:1 and the catalyst (soda) was 1(%) dry mass of rice straw.

 
Keyword(s): BLEACHABILITY, AGRICULTURAL RESIDUES, ORGANSOLV PULPING, BRIGHTNESS, RICE STRAW, CEHEP, HEP
 
References: 
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