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Process for coupling producing bioloigical diesel oil and 1,3-propylene glycol

A technology of biodiesel and propylene glycol, which is applied in the field of bioengineering, can solve the problems of unfavorable conditions and high salt content in glycerin, and achieve the effects of prolonging the service life, eliminating the poisoning and inactivation of lipase, and saving energy

Inactive Publication Date: 2005-08-03
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the chemical synthesis method using petroleum as raw material, the biological method has the characteristics of utilizing renewable resources, mild reaction conditions, simple and safe operation, less by-products, and no environmental pollution. , the biggest obstacle to the industrialization of 3-propanediol, and the by-product glycerin of biodiesel produced by chemical method contains more salt, which is not conducive to the direct use of it to produce 1,3-propanediol

Method used

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  • Process for coupling producing bioloigical diesel oil and 1,3-propylene glycol

Examples

Experimental program
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Effect test

Embodiment 1

[0020] 1) Strain and enzyme: The fermented strain is Klebsiella pneumoniae, which is a facultative anaerobic bacterium, purchased from China General Microorganism Culture Collection Center (CGMCC), and the strain preservation number is 1.1736 . Immobilized lipase Novozym 435 was purchased from Novo Nordisk, from Candidaantarctica, immobilized on a macroporous acrylic resin.

[0021] 2) Culture medium: There are two kinds of seed medium and fermentation medium, which are described as follows:

[0022] A. Seed medium (1L):

[0023] Glycerin: 20g K 2 HPO 4 ·3H 2 O: 4.454g

[0024] K H 2 PO 4 : 1.3g (NH4) 2 SO 4 : 2.0g

[0025] MgSO 4 ·7H 2 O: 0.2g Yeast powder: 1.0g

[0026] CaCO 3 : 2.0g Trace elements TE1: 2mL

[0027] 2% CaCl 2 Solution: 1 mL 0.5% FeSO 4 Solution: 1mL

[0028]Composition of trace element TE1 (1L):

[0029] Saturated hydrochloric acid: 0.9mL ZnCl 2 : 70mg

[0030] MnCl 2 4H 2 O: 100mgH 3 BO 3 : 60mg

[0031] CoCl 2 ·6H 2 O: 200mg NiC...

Embodiment 2

[0049] 1) 1,3-propanediol fermentation strain, culture medium and fermentation process are the same as embodiment 1.

[0050] 2) Add 2kg of rapeseed oil into the reactor, add 320g of immobilized lipase Novozym 435 at the same time, heat to 45°C, add 11g of ethanol (the molar ratio of alcohol to oil is 0.1:1) to start the reaction, and the stirring speed during the reaction is 170r / min, ethanol is added dropwise, and the dilution rate is 0.01h -1 , add ethanol 380g altogether, use the pump to force the reaction solution to circulate, pass through the hollow fiber membrane, the other side of the membrane is 1,3-propanediol fermentation broth.

[0051] 3) The hollow fiber membrane is a cellulose acetate ultrafiltration membrane with a cut-off molecular weight of 10kDa and a surface area of ​​0.5m 2 , the operating pressure is 0.13Mpa, the temperature is 38°C, the tube side of the membrane is the esterification reaction liquid, and the volume ratio of the flow rate to the enzyme...

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Abstract

The present invention belongs to the field of bioengineering technology, and especially a kind of couple producing biological diesel oil and 1, 3-propylene glycol. The present invention features that the course of lipase catalyzed reaction between methanol or ethanol and fat to produce biological diesel oil and the course of biologically converting glycerin into 1, 3-propylene glycol are coupled via membrane filtering for simultaneous proceeding. The present invention has the effects of eliminating the suppression of short-chain alcohol and glycerin on lipase, prolonging the service life of immobilized enzyme, omitting the glycerin separating and extracting step, lowering the production cost, saving time, raising production efficiency and providing economic and feasible process for producing biological diesel oil and 1, 3-propylene glycol.

Description

technical field [0001] The invention belongs to the technical field of bioengineering, and in particular relates to a method for producing biodiesel and 1,3-propanediol by a coupling method. Background technique [0002] Biodiesel refers to long-chain fatty acid esters obtained from renewable oil raw materials through transesterification. It is an environmentally friendly fuel that can replace ordinary diesel. At present, the world's oil reserves are gradually decreasing, and the environmental pollution caused by the exhaust gas emitted after oil combustion is also a major problem facing mankind. Therefore, the development of renewable and environmentally friendly alternative fuels has become one of the most important issues at present. . [0003] At present, the methods of producing biodiesel mainly include chemical method and biological enzymatic method. The chemical method uses excess methanol or ethanol to react with oil under the catalysis of sodium hydroxide or potas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/20C10G3/00C12P7/04
CPCY02P30/20
Inventor 修志龙牟英张代佳孙亚琴
Owner DALIAN UNIV OF TECH
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