Transesterification of vegetable oils

A technology for transesterification and refining vegetable oil, which is applied in the treatment of hydrocarbon oil, biofuel, petroleum industry, etc., can solve the problem of not disclosing specific methods for refining vegetable oil, etc., and achieves the effect of multiple economic benefits

Active Publication Date: 2011-01-19
QS BIODIESEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the publications on the production of biodiesel fuel, t

Method used

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  • Transesterification of vegetable oils
  • Transesterification of vegetable oils
  • Transesterification of vegetable oils

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Pretreatment: 250 g of partially refined sunflower oil was mixed with 75 g of n-hexane and placed in a Parr type reactor. 2.5 g of commercially available Amberlist 15 ion exchange resin and 10 g of methanol were added to the system. The reactor was pressurized to 15 bar with nitrogen. The whole system was placed at 80°C and stirred continuously for 30 minutes. Upon completion, the reactor was rapidly cooled to room temperature with a stream of tap water and depressurized.

[0078] Repeat the above process to obtain analytical samples after washing and evaporation.

[0079]Transesterification: The contents of the reactor were transferred to a 4-neck flask of 1 liter capacity through which was connected a reflux cooler, funnel drop gauge, thermometer and a stirrer on top through the connection of the flask. A few pieces of zeolite and 20 g of methanol (with 15% KOH content) were added to the system. The entire contents were brought to boiling conditions (t = 59°C) and...

Embodiment 2

[0085] Pretreatment: 250 g of partially refined sunflower oil was mixed with 75 g of n-hexane and placed in a Parr type reactor. 2.5 g of commercially available Amberlist 15 ion exchange resin and 10 g of methanol were added to the system. The reactor was pressurized to 15 bar with nitrogen. The whole system was placed at 80°C and stirred continuously for 30 minutes. After completion, the reactor was rapidly cooled to room temperature with a stream of tap water and depressurized.

[0086] Transesterification: The contents of the reactor were transferred to a 4-neck flask of 1 liter capacity through which a reflux cooler, a funnel drop gauge, a thermometer and an overhead stirrer were connected through the connection. A few pieces of zeolite and 20 g of methanol (with 15% KOH content) were added to the system. The entire contents were brought to boiling conditions (t = 59°C) and stirring was continued at this temperature for 10 minutes, then stirring was stopped and the reac...

Embodiment 3

[0093] Pretreatment: Partially refined sunflower oil is mixed with n-hexane in a 4:1 [g:g] ratio and transferred to a reverse extractor where it is contacted with a solvent in a ratio of 1:10 [g:g] 10% KOH aqueous solution and N-methyl-2-pyrrolidone (BASF). The extraction process was carried out at room temperature.

[0094] Transesterification: 400 g of the pretreated raffinate was transferred to a 1 liter capacity 4-neck flask through which was connected a reflux cooler, funnel drop gauge, thermometer and a stirrer on top through the connection of the flask. A few pieces of zeolite and 35 g of methanol (with 15% KOH content) were added to the system. The entire contents were brought to boiling conditions (t = 59°C) and stirring was continued at this temperature for 10 minutes, then stirring was stopped and the reaction mixture was allowed to stand for an additional 10 minutes.

[0095] Refining: Cool the above system to 40°C, transfer the reaction mixture to a separatory f...

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Abstract

A method for producing diesel grade fuel of plant origin by transesterifying a refined vegetable oil with a charge of a C1-C4 alcohol in the presence of a catalyst and at least 0.2 parts by volume, related to unit volume of refined vegetable oil, of an aliphatic hydrocarbon solvent with a boiling point of -42 DEG C to 200 DEG C, comprises mixing the oil, alcohol, catalyst and solvent in a single reaction vessel under homogeneous conditions which promote transesterif ication to 95-98% completion and which suppress reverse glycerolysis, without stopping transesterif ication to remove by- product polar glycerol, and without subjecting the oil/fuel mixture to a further transesterif ication step with a fresh charge of alcohol and catalyst.

Description

technical field [0001] The present invention relates to an improved process for the transesterification of vegetable oils and related triglycerides, and in particular to the production of vegetable-derived diesel grade fuels (now commonly referred to as An improved method for biodiesel fuel (or simply biodiesel). Background technique [0002] It is well known that transesterification with alcohols has a decisive influence on the quality of fuels derived from vegetable oils, since this operation determines whether the viscosity of the resulting fuel is suitable for the purpose of fuel injection and powering the engine. [0003] The transesterification of vegetable oils and alcohols proceeds in a reversible equilibrium reaction according to the following scheme: [0004] [0005] In the above general formula, R, R' and R" represent the hydrocarbon group of the fatty acid component of vegetable oil, and Alk is a C1~C4 alkyl group. As shown in the above schematic diagram, in...

Claims

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Application Information

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IPC IPC(8): C11C3/00C10L1/02C11C3/06
CPCY02E50/13C10L1/026C10G2300/1011C11C3/06C11C3/003Y02E50/10Y02P20/582Y02P30/20C07C67/03C11C3/10
Inventor 安德拉斯·科瓦奇
Owner QS BIODIESEL
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