Processing of rice husk autohydrolysis liquors for obtaining food ingredients

被引：70

作者：

Vegas, R ^{[1
]}

Alonso, JL ^{[1
]}

Donínguez, H ^{[1
]}

Parajó, JC ^{[1
]}

机构：

[1] Univ Vigo, Dept Chem Engn, As Lagoas, Ourense, Spain

来源：

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 2004年 / 52卷 / 24期

关键词：

autohydrolysis; rice husks; hemicelluloses; purification; refining; xylooligosaccharides;

D O I：

10.1021/jf049142t

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

Rice husks are of a lignocellulosic nature, with a hemicellulose fraction made up of substituted arabinoxylan. Rice husks were treated with hot, compressed water (autohydrolysis reaction) under optimized conditions to cause the hydrolytic degradation of arabinoxylan. The reaction products contained volatile components and nonvolatile components (NVC), which were made up of hemicellulose-derived products (substituted oligosaccharides and monosaccharides) and other nonvolatile solutes (ONVS). To decrease the content of ONVS, concentrated autohydrolysis liquors were first subjected to ethyl acetate extraction and then subjected to various alternative treatments (solvent precipitation, freeze-drying solvent extraction, or ion exchange). The resulting liquors were assayed for composition and yield determination. Material balances are presented for the several processes considered. The best results in terms of purification were obtained with sequential stages of ethyl acetate extraction and ion exchange, which led to concentrates with hemicellulose-derived compounds (sugars and substituted sugar oligomers) accounting for 92 wt % of the NVCs.

引用

页码：7311 / 7317

页数：7

共 35 条

[11]

1101::AID-JCTB146&gt

[12]

3.0.CO

[13]

2-M]

[14] Non-isothermal autohydrolysis of Eucalyptus wood [J].

Garrote, G ;

Parajó, JC .

WOOD SCIENCE AND TECHNOLOGY, 2002, 36 (02) :111-123

[15]

Harland C.E., 1994, ION EXCHANGE THEORY

[16]

ISAO Y, 1989, Patent No. 1254692

[17]

IZUMI Y, 2003, Patent No. 2003183303

[18]

Izumi Y., 2003, Japan Patent JP, Patent No. [JP 2,003,048,901, 2003048901, 2,003,048,901]

[19] Isolation and characterization of water-soluble hemicelluloses from flax shive [J].

Jacobs, A ;

Palm, M ;

Zacchi, G ;

Dahlman, O .

CARBOHYDRATE RESEARCH, 2003, 338 (18) :1869-1876

[20] Hydrothermally treated xylan rich by-products yield different classes of xylo-oligosaccharides [J].

Kabel, MA ;

Carvalheiro, F ;

Garrote, G ;

Avgerinos, E ;

Koukios, E ;

Parajó, JC ;

Gírio, FM ;

Schols, HA ;

Voragen, AGJ .

CARBOHYDRATE POLYMERS, 2002, 50 (01) :47-56

← 1 2 3 4 →