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Mehtod for producing 1,3-propanediol and 2,3-cis-butanediol from crude starch material

一种粗淀粉、丙二醇的技术，应用在发酵等方向，达到提高原料利用率、降低生产成本的效果

Active Publication Date: 2005-12-21
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Examples

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example 1

[0024] 1. Liquefaction and saccharification of crude starch raw materials

[0025]The ratio of starch 1475g and water 2722L is configured to heat and liquefy starch milk, add liquefaction enzyme (5u / g starch) twice at 80°C and 95°C for 50min, and then raise the temperature to 110°C to inactivate the enzyme. After cooling, add glucoamylase (200u / g starch) to saccharify at 60°C for 9h, the DE value is 103.46, and the sugar concentration is 31.55%.

[0026] 2. Fermentation of saccharification liquid to produce glycerol

[0027] (1) Strain: Candida kluii ICM-Y-05.

[0028] (2) Culture medium: slant medium (g / L): glucose (prepared with saccharification solution) 200; corn steep liquor 3; urea 3; agar 20; seed medium (g / L): glucose (prepared with saccharification solution) 100; corn steep liquor 3; urea 3; fermentation medium (g / L): glucose (prepared with saccharification liquid) 315; corn steep liquor 3; urea 2.5.

[0029] The pH of the above medium was adjusted to 4-4.5, and al...

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Abstract

This invention provides production of material 1, 3- trimethylene glycol and 2, 3- butylene-glycol by coarse starch. The coarse starch is fermented continuously by yeast cell to obtain the high concentration fermented liquid of glycerine. The fermented liquid of glycerine is filtered to obtain the cells which can be used for the next batch glycerine fermentation. The filtrate is used as the base material for producing 1, 3- trimethylene glycol. Add the nitrogen source in the fermented course. When finishing the fermentation conduct the processes of desalting, distillation, vacuum rectification etc. step to the 3- Trimethylene glycol and 2, 3- Butylene-glycol to obtain the products. At the same time the concention of 1, 3- Trimethylene glycol and 2, 3- Butylene-glycol with high added value is increased through cell back-use and mending material craft. Its advantage lies in: reduced the production cost effectively, raised production efficiency.

Description

technical field [0001] The invention belongs to the technical field of biochemical industry, and in particular provides a method for producing 1,3-propanediol and 2,3-butanediol from crude starch raw materials. Background technique [0002] 1,3-Propanediol (PDO) is an important chemical raw material, which can be used as an organic solvent in ink, printing and dyeing, paint, lubricant, antifreeze and other industries. The most important use of 1,3-propanediol is as a monomer for polyester and polyurethane synthesis, especially polytrimethylene terephthalate (PTT), which is polymerized with terephthalic acid, shows a ratio of 1,2- Polymers synthesized from propylene glycol, butanediol, and ethylene glycol have better performance. At present, the world consumes tens of millions of tons of polyethylene terephthalate (PET) every year, and the chemical stability and biodegradability of PTT are comparable to PET, but the pollution resistance, toughness, resilience and UV resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/18
CPCC12P7/18
Inventor 刘德华程可可刘宏娟林日辉郝健
Owner TSINGHUA UNIV
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