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Preparation method and application of composite catalyst for preparing biodiesel

A composite catalyst and biodiesel technology, applied in the direction of fixing on/in organic carrier, fermentation, hydrolytic enzyme, etc., can solve the problems of high operating cost, large investment, side reaction of unsaturated fatty acid, etc., and achieve process green environmental protection , The effect of small investment in equipment

Pending Publication Date: 2022-06-24
SHAANXI HEALTHFUL BIOLOGICAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this preparation process also has certain defects. For example, the high-temperature and high-pressure reaction will cause side reactions of unsaturated fatty acids, and the high-temperature and high-pressure equipment has high operating costs and requires a large investment.

Method used

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  • Preparation method and application of composite catalyst for preparing biodiesel
  • Preparation method and application of composite catalyst for preparing biodiesel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Example 1: Preparation of Biodiesel Composite Catalyst

[0090] The implementation steps of this embodiment are as follows:

[0091] Using pH7.2 phosphate buffer, the Candida lipase was prepared into a lipase solution with a concentration of 18 mg / ml, and then according to the glutaraldehyde concentration of 0.6% by weight, glutaraldehyde was added to the lipase solution, The obtained mixture solution was shaken in a constant temperature shaker at a temperature of 40°C for 1.0h;

[0092] Then, according to the weight ratio of lipase to resin of 1:8, a strong acid ion exchange resin was added to continue shaking for 5.6 hours, suction filtration, and the obtained resin was washed with a pH 7.2 phosphate buffer until no lipase was detected in the washing liquid, and the loaded fat was obtained. The strong acid ion exchange resin of the enzyme is detected by the method described in this specification, and its lipase loading is 85 mg / g;

[0093] Next, the strongly acidic ...

Embodiment 2

[0103] Example 2: Preparation of Biodiesel Composite Catalyst

[0104] The implementation steps of this embodiment are as follows:

[0105] Using pH7.2 phosphate buffer, Novozyme 435 lipase was prepared into a lipase solution with a concentration of 5 mg / ml, and then glutaraldehyde was added to the lipase solution according to the glutaraldehyde concentration of 1.0% by weight, The obtained mixture solution was shaken for 2.0h at a temperature of 20°C in a constant temperature shaker;

[0106] Then, according to the weight ratio of lipase to resin 1:5, a strong acid ion exchange resin was added to continue to shake for 4.0 hours, suction filtration, and the obtained resin was washed with a pH 7.2 phosphate buffer until no lipase was detected in the washing liquid, and the loaded fat was obtained. The strong acid ion exchange resin of the enzyme is detected by the method described in this specification, and its lipase loading is 100 mg / g;

[0107] Next, the strongly acidic io...

Embodiment 3

[0117] Example 3: Preparation of Biodiesel Composite Catalyst

[0118] The implementation steps of this embodiment are as follows:

[0119] Using pH7.2 phosphate buffer, TL-IM lipase was prepared into a lipase solution with a concentration of 8 mg / ml, and then glutaraldehyde was added to the lipase solution according to the glutaraldehyde concentration of 0.1% by weight, The obtained mixture solution was shaken at a temperature of 24°C for 1.6h in a constant temperature shaker;

[0120] Then, according to the weight ratio of lipase to resin 1:11, a strong acid ion exchange resin was added to continue shaking for 4.8 hours, suction filtration, and the obtained resin was washed with pH 7.2 phosphate buffer until no lipase was detected in the washing liquid, and the loaded fat was obtained. The strong acid ion exchange resin of the enzyme is detected by the method described in this specification, and its lipase loading is 41 mg / g;

[0121] Next, the strongly acidic ion exchange...

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Abstract

The invention relates to a preparation method for preparing a biodiesel composite catalyst, and also relates to application of the biodiesel composite catalyst. The preparation method of the composite catalyst for preparing the biodiesel comprises the following steps: mixing a lipase solution with glutaraldehyde, loading lipase on strong acid ion exchange resin, freeze-drying and the like. The biodiesel preparation method is simple and easy to implement, the process is green and environment-friendly, the equipment investment is small, the content of fatty acid methyl ester in the biodiesel product is 96.9% or above by weight, the yield of the biodiesel product reaches 96% or above, and the prepared composite catalyst can be repeatedly used.

Description

【Technical field】 [0001] The invention belongs to the technical field of chemical industry. More specifically, the present invention relates to a preparation method for preparing a biodiesel composite catalyst, and also relates to the use of the biodiesel composite catalyst. 【Background technique】 [0002] Waste oil is an important biomass resource, and research on its high-value transformation has been a long-term research hotspot at home and abroad. The main components of waste oil are glycerides and free fatty acids. Therefore, waste oil is an important raw material for the production of biodiesel. [0003] Researchers have developed a variety of biodiesel preparation processes according to the main components of waste oils and fats. There are two preparation principles, namely esterification and transesterification. Esterification is the reaction of free fatty acids and methanol to remove a molecule of water to produce fatty acid methyl esters; transesterification is ...

Claims

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Application Information

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IPC IPC(8): C12P7/649C12N9/20C12N11/08
CPCC12P7/649C12N9/20C12N11/08
Inventor 胡永员牛永洁郭建琦孟永宏杨璐张佳
Owner SHAANXI HEALTHFUL BIOLOGICAL ENG
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