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On the characteristics and reactivit...

Wang, Kuo-Ting.

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On the characteristics and reactivity of acid-treated wood and kraft pulp lignin.

Record Type:	Electronic resources : Monograph/item
Title/Author:	On the characteristics and reactivity of acid-treated wood and kraft pulp lignin./
Author:	Wang, Kuo-Ting.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2015,
Description:	139 p.
Notes:	Source: Dissertation Abstracts International, Volume: 77-03(E), Section: B.
Contained By:	Dissertation Abstracts International77-03B(E).
Subject:	Wood sciences. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3731962
ISBN:	9781339185651

On the characteristics and reactivity of acid-treated wood and kraft pulp lignin.
Wang, Kuo-Ting.

On the characteristics and reactivity of acid-treated wood and kraft pulp lignin. - Ann Arbor : ProQuest Dissertations & Theses, 2015 - 139 p.

Source: Dissertation Abstracts International, Volume: 77-03(E), Section: B.

Thesis (Ph.D.)--State University of New York College of Environmental Science and Forestry, 2015.

This item is not available from ProQuest Dissertations & Theses.

This study investigated the characteristics and reactivity of the acid-treated wood and the residual pulp lignin from Norway spruce and sugar maple wood. A major emphasis is on the aryl-ether cleavage reactions and the phenolic hydroxyl group (PhOH) generated is determined in situ by the periodate oxidation method.

ISBN: 9781339185651Subjects--Topical Terms:

3168288
Wood sciences.

On the characteristics and reactivity of acid-treated wood and kraft pulp lignin.
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020 $a 9781339185651
035 $a (MiAaPQ)AAI3731962
035 $a AAI3731962
040 $a MiAaPQ $c MiAaPQ
100 1 $a Wang, Kuo-Ting. $3 3283132
245 1 0 $a On the characteristics and reactivity of acid-treated wood and kraft pulp lignin.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2015
300 $a 139 p.
500 $a Source: Dissertation Abstracts International, Volume: 77-03(E), Section: B.
500 $a Advisers: Yuan-Zong Lai; Edwin H. White.
502 $a Thesis (Ph.D.)--State University of New York College of Environmental Science and Forestry, 2015.
506 $a This item is not available from ProQuest Dissertations & Theses.
520 $a This study investigated the characteristics and reactivity of the acid-treated wood and the residual pulp lignin from Norway spruce and sugar maple wood. A major emphasis is on the aryl-ether cleavage reactions and the phenolic hydroxyl group (PhOH) generated is determined in situ by the periodate oxidation method.
520 $a Under a relatively mild acid (hot-water extraction) condition near 160 °C, a significant cleavage of the aryl-ether unit is observed. The results imply that some of the beta-aryl ether units are hydrolyzed, especially for the sugar maple lignin. In case of the residual lignin in kraft pulps, they still contained some relatively acid-labile aryl ether units. The nature of these reactive structures needs to be examined further.
520 $a The formation of the so-called Klason lignin derived from a strong sulfuric acid treatment (72 %) of wood involved both the hydrolysis of aryl ether units and the lignin condensation reactions. The latter condensation is dominated for the spruce wood lignin. For the sugar maple wood lignin, the initial aryl -- ether cleavage is more pronounced and then followed by the condensation reaction.
520 $a Although the Klason lignin is known to be very condensed, it is still reactive in alkalis at temperatures around 180 °C. These include the cleavages of aryl ether structures and the formation of alkali -- soluble materials. Also, the Klason lignin is shown to be reactive under typical carboxymethylation conditions. They yielded a significant amount of soluble materials around 20 % for the Spruce and 50 % for the sugar maple Klason lignin, respectively. These soluble products have a high content of PhOH units. Thus, the CM reaction may provide a means to utilize the Klason lignin.
590 $a School code: 0213.
650 4 $a Wood sciences. $3 3168288
690 $a 0746
710 2 $a State University of New York College of Environmental Science and Forestry. $b Paper and Bioprocess Engineering. $3 3169421
773 0 $t Dissertation Abstracts International $g 77-03B(E).
790 $a 0213
791 $a Ph.D.
792 $a 2015
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3731962