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Method for producing biological diesel oil from leftover of edible oil process

A technology of biodiesel and leftovers, which is applied in the field of oleochemicals, can solve the problems of harsh acid-catalyzed reaction conditions, and achieve the effects of controlling urban air pollution, improving reaction efficiency, and shortening reaction time

Active Publication Date: 2007-12-19
JIANGNAN UNIV
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Problems solved by technology

[0016] The purpose of the present invention is to provide a method for preparing biodiesel from edible oil processing leftovers. In order to solve the problem of harsh acid-catalyzed reaction conditions, a co-solvent tetrahydrofuran is introduced into the reaction system to overcome the phase interface mass transfer in the heterogeneous reaction. problems, design and optimize a reasonable process flow, and analyze and discuss the properties of the products obtained by acid catalysis

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  • Method for producing biological diesel oil from leftover of edible oil process
  • Method for producing biological diesel oil from leftover of edible oil process

Examples

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Embodiment 1

[0029] Example 1: Optimization of transesterification reaction conditions

[0030] The process steps are: edible oil processing leftovers are pretreated, methanol is added for transesterification reaction, solvent is recovered, glycerin phase is separated by layers, the oil layer is washed with water, and dehydrated to obtain biodiesel.

[0031] The effects of alcohol-to-oil ratio, catalyst dosage, reaction temperature and reaction time on reaction yield were investigated through single factor optimization, respectively, as shown in Figure 3-6.

[0032] The influence of the alcohol-oil ratio on the reaction yield: It can be seen from Figure 3 that the reaction yield reaches the optimal value when the alcohol-oil ratio reaches 21:1, and further increasing the alcohol-oil ratio has little effect on the reaction yield. According to the regression curve y=-0.021X 2 +1.3885X+11.401 (y is the amount of tetrahydrofuran (THF) added and X is the alcohol-to-oil ratio). It can be seen that w...

Embodiment 2

[0053] Example 2: Analysis of the physical and chemical properties of biodiesel

[0054] Because the produced biodiesel will be used as an alternative fuel for diesel engine combustion, in order to ensure that biodiesel has good combustion performance, the physical properties of the biodiesel product prepared in Example 1 were compared with the E DIN 51606 quality standard established by Germany. analysis.

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Abstract

The present invention relates to method of producing biological diesel oil with leftover of edible oil processing, and belongs to the field of oil and grease chemical technology. The method of producing biological diesel oil with leftover of edible oil processing, includes the steps of pre-treatment of the oil leftover, ester exchange reaction with methanol, recovering solvent, laminating to separate glycerin phase, water washing of oil layer, and dewatering to obtain biological diesel oil. The method features the ester exchange reaction in the codissolved system form with the pre-treated oil leftover, methanol and tetrahydrofuran with sulfuric acid as catalyst; and the edible oil leftover produced in the vegetable oil refining process. The biological diesel oil has low viscosity and burning performance similar to that of 2# diesel oil.

Description

Technical field [0001] A method for preparing biodiesel from edible oil processing leftovers belongs to the technical field of oleochemicals. Background technique [0002] Biodiesel, namely fatty acid methyl esters, is a renewable energy produced from oil crops such as soybeans, rapeseed, cottonseed, oil palm, pistacia, and other oil-bearing trees, engineering microalgae and other aquatic plants, animal fats, and catering waste oil. , Is a high-quality substitute for petroleum diesel. Its main component is ester compounds formed by saturated and unsaturated fatty acids with carbon chain 12-20 and methanol. [0003] Compared with conventional petroleum diesel, biodiesel has many excellent characteristics: [0004] It has good low-temperature engine starting performance, and the additive-free cold filter plugging point reaches -20℃; [0005] It has a high flash point and is not a dangerous product. It is convenient to transport, store, and use, and has good safety performance; [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 王兴国金青哲刘元法单良
Owner JIANGNAN UNIV
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