Preparation method of methyl oleate

A technology of methyl oleate and fatty acid methyl ester, which is applied in the field of preparation of methyl oleate, can solve the problems of poor safety, high energy consumption, complicated process, etc., and achieve the effects of full reaction, increased output, and uniform cooling

Pending Publication Date: 2022-03-25
HEBEI JINGU RECYCLING RESOURCES DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the content of methyl oleate in the C18 mixed fatty acid methyl ester is only 40%-48%, and the method of obtaining methyl oleate through purification of the C18 mixed fatty acid methyl ester has the disadvantages of high cost, complex process, and difficulty in industrialized production, and finally obtains The output of methyl oleate is low; the method of preparing methyl oleate by hydrogenating C18 mixed fatty acid methyl ester at high temperature and high pressure has the disadvantages of insufficient reaction, high energy consumption and poor safety.

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  • Preparation method of methyl oleate

Examples

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Effect test

Embodiment 1

[0027] The present embodiment provides a kind of preparation method of methyl oleate, comprises the steps:

[0028] Pump the C18 mixed fatty acid methyl ester (the content of methyl oleate in the C18 mixed fatty acid methyl ester is 40%, the content of methyl linoleate is 55%, and the content of methyl stearate is 5%) into the hydrogenation reactor, and add granules Nickel-lead powder with a density of 38 μm (nickel-lead ratio is 1:1), the amount of nickel-lead powder added is 1‰ of C18 mixed fatty acid methyl ester), stir evenly, and the stirring speed is 80 rpm;

[0029] Turn on the self-circulation pump of the hydrogenation reactor, inhale excess hydrogen through the Venturi jet port, and then add hydrogen to the C18 mixed fatty acid methyl ester through the static mixer circulation, (the amount of hydrogen added is 3‰ of the C18 mixed fatty acid methyl ester ) at 40°C under normal pressure, and react for 4 hours to obtain crude methyl oleate. If the temperature exceeds 40°...

Embodiment 2

[0033] The present embodiment provides a kind of preparation method of methyl oleate, comprises the steps:

[0034] Pump the C18 mixed fatty acid methyl ester (the content of methyl oleate in the C18 mixed fatty acid methyl ester is 48%, the content of methyl linoleate is 50%, and the content of methyl stearate is 2%) into the hydrogenation reactor, and add the granules Nickel-lead powder with a density of 48 μm (nickel-lead ratio is 1:0.3), the addition of nickel-lead powder is 3‰ of C18 mixed fatty acid methyl ester), stir evenly, and the stirring speed is 60 rpm;

[0035] Turn on the self-circulation pump of the hydrogenation reactor, inhale excess hydrogen through the Venturi jet port, and then add hydrogen to the C18 mixed fatty acid methyl ester through the static mixer circulation, (the amount of hydrogen added is 10‰ of the C18 mixed fatty acid methyl ester ) at 20°C under normal pressure, and react for 12 hours to obtain crude methyl oleate. If the temperature exceeds...

Embodiment 3

[0039] The present embodiment provides a kind of preparation method of methyl oleate, comprises the steps:

[0040]Pump the C18 mixed fatty acid methyl ester (the content of methyl oleate in the C18 mixed fatty acid methyl ester is 45%, the content of methyl linoleate is 45%, and the content of methyl stearate is 10%) into the hydrogenation reactor, and add the granules Nickel-lead powder with a density of 42 μm (the ratio of nickel-lead to 1:0.6), the addition of nickel-lead powder is 2‰ of C18 mixed fatty acid methyl ester), stir evenly, and the stirring speed is 70 rpm;

[0041] Turn on the self-circulation pump of the hydrogenation reactor, inhale excess hydrogen through the Venturi jet port, and then add hydrogen to the C18 mixed fatty acid methyl ester through the static mixer circulation, (the amount of hydrogen added is 6‰ of the C18 mixed fatty acid methyl ester ) at 30°C under normal pressure, and react for 8 hours to obtain crude methyl oleate. If the temperature ex...

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Abstract

The invention relates to the technical field of fine chemical engineering, in particular to a preparation method of methyl oleate, which comprises the following steps: step 1, adding a nickel-lead catalyst into C18 mixed fatty acid methyl ester, and uniformly stirring; 2, introducing hydrogen into the C18 mixed fatty acid methyl ester, and reacting at 20-40 DEG C for 4-12 hours to obtain crude methyl oleate; and 3, filtering the crude methyl oleate, cooling to 2-6 DEG C for the first time, cooling to-5-0 DEG C for the second time, and filtering after 2-5 hours to obtain the methyl oleate. The preparation method provided by the invention is low in cost, low in energy consumption, good in safety, simple in process and sufficient in hydrogenation reaction, the yield of methyl oleate in C18 mixed fatty acid methyl ester can be increased, the purity of methyl oleate can be improved, the economic benefit of biodiesel is increased, and the method is suitable for industrial production. The market competitiveness of a methyl oleate product is favorably improved.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a method for preparing methyl oleate. Background technique [0002] Fatty acid methyl esters, obtained from natural animal and vegetable oils through transesterification, are good substitutes for petrochemical diesel. Methyl oleate in fatty acid methyl esters has relatively stable chemical properties and excellent physical properties. Plasticizer, water repellent and resin toughener. [0003] The C18 mixed fatty acid methyl esters separated from biodiesel mainly contain methyl oleate, methyl linoleate and methyl stearate, among which the two C=C bonds in methyl linoleate not only affect its performance as The storage and use performance of the fuel will also cause reaction disorder, resulting in a decrease in the reaction rate and poor product performance. The single C=C bond of methyl oleate can effectively avoid the trouble caused by too many double bonds. However, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/303C07C67/60C07C67/52C07C69/58
CPCC07C67/303C07C67/60C07C67/52C07C69/58
Inventor 赵敏仲王子腾赵松
Owner HEBEI JINGU RECYCLING RESOURCES DEV
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