Co-production of xylose, xylitol and arabinose from agricultural and forestry wastes

A technology of agricultural and forestry waste and arabinose, applied in the direction of biochemical equipment and methods, microorganisms, sugar production, etc., can solve the problems of waste of xylose mother liquor, waste of resources, environment, pollution, etc., to reduce salt content and increase production capacity Reduced effect
CN102268490AActive Publication Date: 2011-12-07BEIJING UNIV OF CHEM TECH
6 Cites 36 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Publication Date
2011-12-07

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention relates to a clean technique for co-producing xylose, xylitol and arabinose from agricultural and forestal waste, belonging to the field of utilization of agricultural and forestal waste. The technique comprises the following steps: pretreating and preprocessing the raw material, and hydrolyzing in a thermophilic digestion mode to prepare a hemicellulose hydrolysate; after centrifugalizing to remove solid residues, carrying out TiO2-loaded activated carbon photocatalysis or ion exchange resin decolorization and detoxification treatment on the hydrolysate; carrying out MVR (mechanical vapor recompression) concentration treatment and gradient-cooling crystallization to obtain a xylose product and a xylose mother solution; fermenting L-arabinose unconverted xylitol fermentationhigh-yield strain xylitol by using the xylose mother solution as the medium to produce the xylitol; centrifugalizing to remove thalli, and carrying out decolorization and desalting treatment by membrane-process or resin adsorption; separating by using a simulated moving bed or chromatographic separation technology to obtain a xylitol phase and an L-arabinose phase; and carrying out MVR or vacuum concentration treatment on the two phases, and crystallizing in a gradient programmed cooling mode to respectively obtaining a xylitol product and an L-arabinose product, wherein the two mother solutions can be recycled.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a cleaning process for joint production of xylose, xylitol and L-arabinose by utilizing agricultural and forestry wastes, especially using a high-temperature cooking process that is good for the environment to prepare agricultural and forestry wastes such as corncobs to obtain a hemicellulose hydrolyzate, which is processed by Purification and crystallization to obtain xylose crystals, xylose mother liquor adopts biological method to produce xylitol, and crystallizes to obtain xylitol and L-arabinose crystals after simulated moving bed separation. Background technique

[0002] According to the data provided by the Ministry of Agriculture of my country, the amount of agricultural waste cellulose resources in China has reached 600 million tons, less than half of which are currently used for firewood, and most of them are burned and discarded; and the data provided by the Ministry of Forestry shows that my country's forestry waste ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More