Microwave Assisted-Acid Hydrolysis of Jabon Kraft Pulp

2018 ◽  
Vol 10 (6) ◽  
pp. 1503-1517 ◽  
Author(s):  
Widya Fatriasari ◽  
Triyani Fajriutami ◽  
R. P. Budi Laksana ◽  
Nyoman J. Wistara
Keyword(s):  
Acid Hydrolysis ◽  
Kraft Pulp ◽  
Microwave Assisted ◽  
Hydrolysis Of

Evidence for the formation of lignin-hexenuronic acid-xylan complexes during modified kraft pulping processes

Holzforschung ◽  
2006 ◽  
Vol 60 (2) ◽  
pp. 137-142 ◽  
Author(s):  
Zhi-Hua Jiang ◽  
Jean Bouchard ◽  
Richard Berry
Keyword(s):  
Acid Hydrolysis ◽  
Kraft Pulp ◽  
Kraft Pulping ◽  
Order Kinetic ◽  
Kraft Pulps ◽  
First Order ◽  
Pseudo First Order ◽  
Hexenuronic Acid ◽  
Kinetics Of ◽  
Hydrolysis Of

Abstract The finding that hexenuronic acid (HexA) groups can be selectively removed from kraft pulps by acid hydrolysis has provided an opportunity to reduce bleaching chemicals. However, there is evidence that the acid hydrolysis is not uniform. In this report, we evaluate the kinetics of acid hydrolysis of HexA in a xylan sample enriched with HexA, a conventional kraft pulp, and three modified kraft pulps: anthraquinone pulp (Kraft-AQ), polysulfide pulp (PS), and polysulfide-anthraquinone pulp (PS-AQ). We found that HexA present in the xylan and conventional kraft pulp behaved similarly toward the acid hydrolysis throughout. On the other hand, HexA present in the Kraft-AQ, PS-AQ and PS pulps was heterogeneous toward acid hydrolysis and the reaction can be separated into two pseudo-first-order kinetic phases, each of which has a different rate constant. The kinetic data provide evidence for the formation of lignin-HexA-xylan complexes during modified kraft pulping processes.

scholarly journals Microwave-assisted Acid Hydrolysis of Starch Polymer in Cassava Pulp in the Presence of Activated Carbon

2012 ◽  
Vol 4 ◽  
pp. 238-244 ◽  
Author(s):  
E. Hermiati ◽  
D. Mangunwidjaja ◽  
T.C. Sunarti ◽  
O. Suparno ◽  
B. Prasetya
Keyword(s):  
Activated Carbon ◽  
Acid Hydrolysis ◽  
Microwave Assisted ◽  
Cassava Pulp ◽  
Hydrolysis Of

scholarly journals Microwave-assisted Acid Hydrolysis of Konjac Products for Determining the Konjac Powder Content

2013 ◽  
Vol 29 (11) ◽  
pp. 1049-1053 ◽  
Author(s):  
Yuuki TANAKA ◽  
Ken OKAMOTO ◽  
Ayako MATSUSHIMA ◽  
Tomoki OTA ◽  
Yoshitsugu MATSUMOTO ◽  
...  
Keyword(s):  
Acid Hydrolysis ◽  
Microwave Assisted ◽  
Powder Content ◽  
Hydrolysis Of
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