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KINETICS OF FIR WOODOXIDATION BY OXYGENIN AQUEOUS ALKALINEMEDIA : научноеиздание Tarabanko Valery EvgenievichPervishina Ekaterina PetrovnaTarabanko Nikolay Valerievich2016 год

KINETICS OF FIR WOOD OXIDATION BY OXYGEN IN AQUEOUS ALKALINE MEDIA : научное издание
статья из журнала

Дополнительные ссылки: РИНЦ
База данных: Каталог библиотеки СФУ
Библиографическое описание: KINETICS OF FIR WOOD OXIDATION BY OXYGEN IN AQUEOUS ALKALINE MEDIA : научное издание / V. E. Tarabanko [et al.]. - Текст : непосредственный // Химия растительного сырья. - 2016. - № 4. - С. 57-63. - ISSN 1029-5151. - ISSN 1029-5143. Перевод заглавия: Kinetics of Fir Wood Oxidation by Oxygen in Aqueous Alkaline Media
Аннотация: Kinetics of fir wood oxidation ( Abies sibirica ) in aqueous alkaline media were studied by measuring oxygen consumption rates. Oxidation of extracted wood conforms to the kinetics of non-branching chain mechanism. The same mechanism governs the initial stage of non-extracted wood oxidation, but a transition to degenerate branching mode soon occurs. This transition is probably caused by softwood's low hemicelluloses content and high content of propyl guaiacol lignin units that are prone to condensation involving phenolic hydroxyls. This leads to quick depletion of phenolic and uronic carboxylic groups; chain initiation by oxidizing the respective anions becomes impossible, and degenerate branching takes the lead. It is assumed that inert hydrophobic fir extractives physically shield hydroperoxides responsible for degenerate branching from alkali. This prevents alkali from causing heterolytic hydroperoxide cleavage that does result in chain branching. It is assumed that the catalyst accelerates the reaction of homolytic cleavage of the aforementioned hydroperoxides.
Год издания: 2016
Авторы: Tarabanko Valery Evgenievich , Pervishina Ekaterina Petrovna , Tarabanko Nikolay Valerievich , Chernyak Mikhail Yurievich , Kaygorodov Konstantin Leonidovich , Chelbina Yulia Vyacheslavovna , Boyarchuk Dmitry Valentinovich
Издательство: федеральное государственное бюджетное образовательное учреждение высшего образования "Алтайский государственный университет, Барнаул
Источник: Химия растительного сырья
Выпуск: № 4
Номера страниц: 57-63
Держатель оригинала документа: Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Siberian Federal University
Количество экземпляров:
Твёрдая копия издания отсутствует в фонде библиотеки

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