Method for catalyzing and synthesizing polyalcohol ester by immobilized lipase

A technology for immobilizing lipase and polyol ester, applied in lubricating compositions, base materials, fermentation, etc., can solve the problems of complex production process, side reactions, product pollution and the like

Inactive Publication Date: 2008-02-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Though the above-mentioned catalyzer that adopts liquid acid has higher conversion rate (95%-98%) to reaction, there are following problems: (1) there is side reaction to take place in the production, and target product selectivity is not high; (2) production The process is complex and requires alkali neutralization, water washing, etc.; (3) The catalyst severely corrodes production equip

Method used

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  • Method for catalyzing and synthesizing polyalcohol ester by immobilized lipase

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Preparation and immobilization of embodiment 1 lipase

[0052] The immobilized enzyme refers to the applicant's co-pending Chinese invention patent application No.200510112638.5 and Tan TW, Zhang M, Wang BW, Ying CH, Deng L.Screening of high lipase producing Candida sp.and production oflipase by fermentation.Process Prepared by the method in Biochem 2003; 39(4): 459-65, hereinafter the same.

[0053] The cotton cloth and the co-fixative agent are mixed according to the mass volume ratio of 1:1, and dried at room temperature to obtain the activated carrier. Co-fixative is PEG6000, coconut oil, Tween 80, gelatin, lecithin and magnesium sulfate mixture, and its mass ratio is gelatin: lecithin: PEG6000: Tween 80: magnesium sulfate: coconut oil=5: 1: 1: 2 :1:1. The prepared Yarrow lipolytica lipase aqueous solution is mixed with the activated carrier at a ratio of 8000 U / g activated carrier, soaked, and dried at room temperature to obtain immobilized lipase.

[0054] Acid...

Embodiment 23～25

[0058] Embodiment 23~25 solvent-free system

[0059] Unless otherwise specified, all yields in the examples of the present invention are measured by gas chromatography (GC) method.

Embodiment 2

[0060] Embodiment 2: the immobilized enzyme prepared in 0.5g embodiment 1 adds in the 5ml normal hexane that contains 0.134g trimethylolpropane and 0.847g (alcohol of 3 times material amount) oleic acid, organic solvent water content is 0.5 %, at 40°C, shake the reaction. After 24 h the conversion of polyol reached 63.145% (measured by gas chromatography (GC)).

[0061] Embodiment 2: the immobilized enzyme prepared in 0.5g embodiment 1 is added in the 5ml isooctyl alcohol that contains 0.134g trimethylol propane and 0.433g (alcohol of 3 times material amount) octanoic acid, organic solvent water content is 0.5 %, at 40°C, shake the reaction. After 24 hours, the conversion rate of polyols reached 60.61%.

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Abstract

The present invention relates to a preparation method of polyhydric alcohol ester. Said method includes the steps of adopting immobilized lipolase and utilizing monobasic fatty acid and polyhydric alcohol to catalyze synthesis of polyhydric alcohol ester. Said invention also relates to a polyhydric alcohol ester preparation prepared by adopting the invented method and its application as basic oil of lubricating oil.

Description

technical field [0001] The invention relates to a method for synthesizing polyol esters. More specifically, the present invention relates to a method for synthesizing polyhydric alcohol ester by using immobilized lipase, especially immobilized microbial lipase, to catalyze the reaction of polyhydric alcohol and monobasic fatty acid. The present invention also relates to the polyol ester preparation produced by the method and its use as lubricating oil base oil. Background technique [0002] The base oils of environmentally friendly lubricants are mainly vegetable oils and synthetic esters. Compared with other base oils, synthetic esters have the following lubricating chemical characteristics: (1) Compared with mineral oils, ester oils have a wider liquid range, higher viscosity index, excellent viscosity-temperature performance and low-temperature performance; ( 2) The thermal stability of the ester oil is good; (3) the synthetic ester has a good biodegradation function; a...

Claims

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Application Information

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IPC IPC(8): C12P7/62C10M105/38
Inventor 谭天伟赵娟陈必强
Owner BEIJING UNIV OF CHEM TECH
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