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

A biodiesel and scrap technology, applied in the field of oleochemical industry, can solve the problems of harsh acid catalytic reaction conditions, and achieve the effects of controlling urban air pollution, ensuring oil safety, and reducing the amount of methanol

Active Publication Date: 2006-08-23
JIANGNAN UNIV
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  • Claims
  • Application Information

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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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: the optimization of transesterification reaction condition

[0030] Investigate respectively the influence of alcohol-oil ratio, catalyst consumption, reaction temperature and reaction time on reaction yield by single factor optimization, see respectively Figure 3-6 .

[0031] Effect of alcohol-oil ratio on reaction yield: by image 3 It can be seen that the reaction yield reaches the optimum 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, X is the ratio of alcohol to oil), it can be seen that the amount of THF added is about 31% when the ratio of alcohol to oil reaches 21:1, and the amount of methanol added in the co-solvent system is about 31%. The volume ratio of the volume of solvent added to the system to the volume of edible oil offal is about 1.8:1. In...

Embodiment 2

[0050] Embodiment 2: Analysis of biodiesel physicochemical properties

[0051] Because the produced biodiesel will be used as an alternative fuel for diesel engine combustion, so in order to ensure that the biodiesel has good combustion performance, the physical properties of the product were analyzed according to the E DIN 51606 quality standard formulated by Germany.

[0052] main indicators

Standard Test Method

scope

detection value

iodine value

Acid value (mgKOH / g)

Monoglyceride (W%)

Diglycerides (W%)

Triglycerides (W%)

cetane number

Moisture content (mg / kg)

DIN53241-1

DIN 51558-1

E DIN 51609

E DIN 51609

E DIN 51609

DIN 51773

DIN 51777-1

＜115

＜0.5

＜0.8

＜0.4

＜0.4

＞49

＜300

105.7

0.087

0.39

0

0

53.4

132

[0053] The cetane number in the product can reflect the combustion performance of biodiesel. The cetane number of b...

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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] The invention discloses a method for preparing biodiesel from edible oil processing leftovers, belonging to the technical field of oleochemicals. Background technique [0002] Biodiesel is fatty acid methyl ester, which is a renewable energy produced from oil crops such as soybeans, rapeseeds, and cottonseeds, oily forest fruits such as oil palms and pistachios, aquatic plants such as engineered microalgae, animal fats, and catering waste oils. , is a high-quality substitute for petroleum diesel, and its main component is the ester compound formed by saturated and unsaturated fatty acids with a carbon chain of 12-20 and methanol. [0003] Compared with conventional petroleum diesel, biodiesel has many advantages: [0004] It has good low-temperature engine starting performance, and the cold filter point without additives can reach -20°C; [0005] It has a high flash point and is not a dangerous product. It is easy to transport, store and use, and has...

Claims

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Application Information

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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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