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A kind of preparation method of fatty acid isooctyl ester

A technology of fatty acid isooctyl ester and isooctyl alcohol, which is applied in fatty acid esterification, chemical instruments and methods, transportation and packaging, etc., can solve the problems of complex process operation, high catalyst cost, difficult product separation, etc., to speed up the reaction The effect of speed, shortened reaction time, and easy recycling

Active Publication Date: 2019-11-12
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the disadvantages of the prior art, such as high catalyst cost, difficult separation from the product, complicated process operation, equipment corrosion and environmental pollution in the production process, and uses biodiesel (fatty acid methyl ester) and isooctyl alcohol as raw materials to adopt solid Alkali, especially potassium carbonate is used as a catalyst to prepare fatty acid isooctyl esters by transesterification in a static mixing reaction device, a method for preparing fatty acid isooctyl esters is provided, and it is a catalyst with high product conversion rate and simple operation process. Preparation method of fatty acid isooctyl ester with high activity, low cost and easy recycling

Method used

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  • A kind of preparation method of fatty acid isooctyl ester
  • A kind of preparation method of fatty acid isooctyl ester
  • A kind of preparation method of fatty acid isooctyl ester

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Mix and preheat 100.0 g biodiesel and 47.6 g isooctyl alcohol (equivalent to ester alcohol molar ratio of 1:1) to 170 ° C and add to the static mixing reaction device, then add 1.0 g of solid alkali potassium carbonate, in the reactor Nitrogen gas is blown into the calandria gas distributor, the reaction temperature is controlled to 170°C, the condensate temperature of the primary condenser is controlled to be 80°C, the condensate temperature of the secondary condenser is controlled to be 10°C, the timing is started, and the reaction process The by-product methanol in the biodiesel was continuously transferred away, and the reaction time was 2 hours. The conversion rate of the biodiesel was 38.0% by sampling and measuring the reaction conversion rate by gas chromatography.

Embodiment 2-5

[0030]The difference between Examples 2-5 and Example 1 is that the molar ratio of biodiesel to isooctyl alcohol is different, and other conditions are the same as above, and the feed ratio of reactants and the reaction results are shown in Table 1.

[0031] Raw material charging ratio and reaction result table of table 1 embodiment 2-5

[0032]

[0033] It can be seen from Table 1 that the conversion rate of biodiesel increases with the increase of the molar ratio of ester alcohol. When the molar ratio of biodiesel to isooctyl alcohol is 1:5, the conversion rate is greater than 99.5%.

Embodiment 6-9

[0035] The difference between embodiment 6-9 and example 1 is that the ester alcohol molar ratio is selected as 1:3, and the catalyst consumption is changed. The reaction process is the same as the method of example 1, and the catalyst consumption accounts for the percentage of biodiesel quality and the reaction results as shown in the table 2.

[0036] The reaction result table of the different catalyst dosages of table 2 embodiment 6-9

[0037]

[0038] The results in Table 2 show that the conversion rate of biodiesel increases with the increase of the amount of catalyst. When the amount of catalyst is 4.0% of the mass of biodiesel, the conversion rate of biodiesel is greater than 99.5%.

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Abstract

The invention discloses a preparation method of fatty acid isooctyl ester, which mixes and preheats biodiesel and isooctyl alcohol and puts it into a static mixing reaction device with a solid base catalyst, and circulates it at 140-180°C under the condition of nitrogen flow The transesterification reaction takes 1 to 2 hours. The by-product methanol in the transesterification reaction process is continuously vaporized and removed from the reaction system in time through nitrogen entrainment. After the reaction is completed, the reaction solution is firstly subjected to vacuum distillation to recover excess isooctyl alcohol. , and then high-quality fatty acid isooctyl esters are obtained through high-vacuum rectification. The present invention adopts a static mixer to fully and evenly contact the feed liquid, strengthen mass transfer, and increase the reaction rate; uses potassium carbonate as a solid alkali catalyst, avoids the acid-catalyzed water washing step, and at the same time does not need to be filtered out from the reaction kettle after the reaction, and can be passed through Sedimentation realizes separation and reuse; during the reaction process, the by-product methanol is continuously removed, which improves the reaction conversion rate and shortens the reaction time. It has the advantages of high efficiency, environmental protection, and simple operation process.

Description

technical field [0001] The invention relates to a method for preparing fatty acid isooctyl esters, specifically using biodiesel (fatty acid methyl ester) and isooctyl alcohol as raw materials, using solid base as a catalyst, and performing transesterification in a static mixing reaction device to prepare fatty acid isooctyl esters ester method. Background technique [0002] With the increasing consumption of petrochemical energy, biodiesel, as a renewable resource, has been widely considered as a good substitute for petrochemical energy. According to reports, the global biodiesel production in 2015 was nearly 30 million tons, and the biodiesel industry developed rapidly, becoming a rising emerging industry in the 21st century. The development of new products in the biodiesel industry chain is an effective way to improve the economic benefits of biodiesel production enterprises, and it is also an important development direction of the current biodiesel industry. [0003] Fa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11C3/10B01J19/24B01F5/06
CPCB01J19/24C11C3/10B01F25/42Y02E50/10
Inventor 聂勇郑挺计建炳解庆龙卢美贞夏凡王广全吴振宇梁晓江
Owner ZHEJIANG UNIV OF TECH