The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 28, 2011
Filed:
Jun. 13, 2006
Dehua Liu, Beijing, CN;
Keke Cheng, Beijing, CN;
Hongjuan Liu, Beijing, CN;
Rihui Lin, Beijing, CN;
Jian Hao, Beijing, CN;
Dehua Liu, Beijing, CN;
Keke Cheng, Beijing, CN;
Hongjuan Liu, Beijing, CN;
Rihui Lin, Beijing, CN;
Jian Hao, Beijing, CN;
Tsinghua University, Beijing, CN;
Abstract
The invention discloses a method for producing 1,3-propanediol and 2,3-butanediol from raw starch materials, including the following steps: 1)orFang are inoculated into a fermentation medium with the saccharifying liquid of the raw starches as a carbon source; the yeast cells are cultured on an aerobic condition until glucose-consuming-rate is significantly reduced, and then fermented anaerobically to a glucose concentration from 5 to 10 g/L; the fermentation broth is collected and filtered to remove the yeast cells in the broth, and the resultant filtrate is glycerin fermentation broth; 2), orare inoculated into a fermentation medium in which the glycerin fermentation broth obtained from step 1) serves as a carbon source; the bacteria are fermented anaerobically for 30-32 hours, and then fermented aerobically when the production rate of 1,3-propanediol decreased obviously, and the fermentation was stopped when the concentration of glycerin is reduced to a level below 10 g/L, and finally 1,3-propanediol and 2,3-butanediol are obtained. The method of the present invention can effectively reduce production cost and increase productivity.