The composition and physicochemical characteristics of polysaccharides extracted from spent liquors of catalytic and noncatalytic delignification of larch wood in the acetic acid-hydrogen peroxide medium were studied. The following were used as catalysts: (NH4)(6)Mo7O24, MnSO4, TiO2, and ZnSO4. The structure of polysaccharides was identified by FTIR and NMR spectroscopy. Their composition was established using gas chromatography, and the physicochemical characteristics were studied using gel permeation chromatography, scanning electron microscopy, thermogravimetric analysis, gas adsorption, and elemental analysis. It was shown that in the process of oxidative delignification, a significant amount of hemicelluloses and arabinogalactan passes into the spent liquor. The yield of polysaccharides was up to 16.9 wt%. Polysaccharides had a weight-average molecular weight of up to 22.9 kDa and a narrow molecular weight distribution.
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MHamed Bougara Univ, Res Unit, Mat Proc & Environm UR MPE, Boumerdes 35000, AlgeriaMHamed Bougara Univ, Res Unit, Mat Proc & Environm UR MPE, Boumerdes 35000, Algeria
Benouadah, Nacera
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Pranovich, Andrey
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Abo Akad Univ, Johan Gadolin Proc Chem Ctr, Porthansgatan 3, FI-20500 Turku, FinlandMHamed Bougara Univ, Res Unit, Mat Proc & Environm UR MPE, Boumerdes 35000, Algeria
Pranovich, Andrey
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Aliouche, Djamel
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MHamed Bougara Univ, Lab Fibrous Polymers Treatment & Forming LTMFP, Boumerdes 35000, AlgeriaMHamed Bougara Univ, Res Unit, Mat Proc & Environm UR MPE, Boumerdes 35000, Algeria
Aliouche, Djamel
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Labidi, Jalel
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Willfor, Stefan
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Abo Akad Univ, Johan Gadolin Proc Chem Ctr, Porthansgatan 3, FI-20500 Turku, FinlandMHamed Bougara Univ, Res Unit, Mat Proc & Environm UR MPE, Boumerdes 35000, Algeria
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VTT Brasil Pesquisa & Desenvolvimento Ltda, Barueri, SP, Brazil
Ctr Nacl Pesquisa Energia & Mat CNPEM, Lab Nacl Ciencia & Tecnol Bioetanol CTBE, Campinas, SP, BrazilVTT Brasil Pesquisa & Desenvolvimento Ltda, Barueri, SP, Brazil
Bragatto, J.
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Segato, F.
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Ctr Nacl Pesquisa Energia & Mat CNPEM, Lab Nacl Ciencia & Tecnol Bioetanol CTBE, Campinas, SP, Brazil
Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, BrazilVTT Brasil Pesquisa & Desenvolvimento Ltda, Barueri, SP, Brazil
Segato, F.
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Squina, F. M.
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Ctr Nacl Pesquisa Energia & Mat CNPEM, Lab Nacl Ciencia & Tecnol Bioetanol CTBE, Campinas, SP, BrazilVTT Brasil Pesquisa & Desenvolvimento Ltda, Barueri, SP, Brazil
机构:
MHamed Bougara Univ, Res Unit, Mat Proc & Environm UR MPE, Boumerdes 35000, AlgeriaMHamed Bougara Univ, Res Unit, Mat Proc & Environm UR MPE, Boumerdes 35000, Algeria
Benouadah, Nacera
;
Pranovich, Andrey
论文数: 0引用数: 0
h-index: 0
机构:
Abo Akad Univ, Johan Gadolin Proc Chem Ctr, Porthansgatan 3, FI-20500 Turku, FinlandMHamed Bougara Univ, Res Unit, Mat Proc & Environm UR MPE, Boumerdes 35000, Algeria
Pranovich, Andrey
;
Aliouche, Djamel
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MHamed Bougara Univ, Lab Fibrous Polymers Treatment & Forming LTMFP, Boumerdes 35000, AlgeriaMHamed Bougara Univ, Res Unit, Mat Proc & Environm UR MPE, Boumerdes 35000, Algeria
Aliouche, Djamel
;
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Labidi, Jalel
;
Willfor, Stefan
论文数: 0引用数: 0
h-index: 0
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Abo Akad Univ, Johan Gadolin Proc Chem Ctr, Porthansgatan 3, FI-20500 Turku, FinlandMHamed Bougara Univ, Res Unit, Mat Proc & Environm UR MPE, Boumerdes 35000, Algeria
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VTT Brasil Pesquisa & Desenvolvimento Ltda, Barueri, SP, Brazil
Ctr Nacl Pesquisa Energia & Mat CNPEM, Lab Nacl Ciencia & Tecnol Bioetanol CTBE, Campinas, SP, BrazilVTT Brasil Pesquisa & Desenvolvimento Ltda, Barueri, SP, Brazil
Bragatto, J.
;
Segato, F.
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Ctr Nacl Pesquisa Energia & Mat CNPEM, Lab Nacl Ciencia & Tecnol Bioetanol CTBE, Campinas, SP, Brazil
Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, BrazilVTT Brasil Pesquisa & Desenvolvimento Ltda, Barueri, SP, Brazil
Segato, F.
;
Squina, F. M.
论文数: 0引用数: 0
h-index: 0
机构:
Ctr Nacl Pesquisa Energia & Mat CNPEM, Lab Nacl Ciencia & Tecnol Bioetanol CTBE, Campinas, SP, BrazilVTT Brasil Pesquisa & Desenvolvimento Ltda, Barueri, SP, Brazil