Title: Method for extracting xylose and xylitol from straw of crops
Application Number: 03110852 Application Date: 2003.01.10
Publication Number: 1515578 Publication Date: 2004.07.28
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C07C31/26,C07H3/02,C13K13/00
Applicant(s) Name: Zheng Qingyi Address: 150001
Inventor(s) Name:
Attorney & Agent: zu yuqing
Abstract:
     The method for extracting xylose and xylitol from crop straw and stalk includes the following steps: using crop straw and stalk as raw material, pulverizing raw material, adding water whose added quantity is 4-6 times raw material weight, steaming for 1.5-2.5 hr. at 125-135 deg.C, washing for 3-5 times by using hot water with 75-85 deg.C, adding acid solution whose concentration is 0.65-0.75% and added quantity is 2-4 times raw material weight, making hydrolysis treatment at 105-115 deg.C until the xylose concentration is reached to 8-10%, filtering and decolouring by adopting resin, adopting ion-exchange resin to make ion-exchange treatment, making evaporation and concentration treatment under the condition of that pressure is 0.09 MPa and temp. is less than or equal to 75 deg.C, cooling to 60 deg.C and spray-drying so as to obtain the invented product.
Time: 4
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