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Preparation process of fatty acid isooctyl ester

A technology of isooctyl fatty acid and preparation process, which is applied in the directions of fatty acid esterification, fatty acid production, fatty acid chemical modification, etc., can solve the problems of large amount of isooctyl alcohol and catalyst, difficult industrialization of microwave-assisted method, and difficult separation of catalyst, etc. Achieve the effect of reducing product pollution, easy separation, and improving yield

Active Publication Date: 2014-12-24
丰益油脂科技(连云港)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method overcomes the problems of serious equipment corrosion, difficult separation of catalyst, complex post-treatment and large amount of waste water when concentrated sulfuric acid is used as catalyst.
But this method has the problem that the amount of isooctyl alcohol and the amount of catalyst are large. For example, when the molar ratio of alkyd to acid is 1:2 in this method, the yield of isooctyl palmitate is only 85.5%; and the amount of catalyst is 2 %, the yield of isooctyl palmitate was only 93.5%
[0007] Later, some scholars studied the microwave-assisted method and the enzyme-catalyzed method. The microwave-assisted method is not easy to be industrialized, while the enzyme-catalyzed method has few by-products and no serious corrosion, but the reaction time is long and the enzyme is easily inactivated.

Method used

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  • Preparation process of fatty acid isooctyl ester

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0073] In a particularly preferred embodiment, the preparation method of the supported catalyst comprises the following steps:

[0074] a) Prepare an aqueous solution of active substances (such as acid sulfate or p-toluenesulfonic acid) with a concentration of about 2wt% to saturation;

[0075] b) weighing a corresponding amount of carrier, adding it to the solution obtained in a), stirring evenly, and soaking for about 2-48h; and

[0076] c) Filter, and dry the filter cake at about 100-200°C for about 2-10 hours.

[0077] In a particularly preferred embodiment, the fatty acid isooctyl ester preparation process of the present invention comprises the following steps:

[0078] 1) Mix fatty acid, isooctyl alcohol and catalyst in a reactor and react under heating conditions;

[0079] 2) After the reaction, remove the isooctyl alcohol and / or the catalyst to obtain the crude product of fatty acid isooctyl ester; and

[0080] 3) Deacidify the obtained crude product to obtain the f...

Embodiment

[0094] The present invention is described exemplarily through examples below, and it should be understood that these examples are only for the purpose of illustration and do not constitute a limitation to the present invention.

[0095] Reagents and Assays

[0096] 1) Various fatty acids used in all examples and comparative examples were provided by Yihai (Lianyungang) Oil Chemical Industry Co., Ltd. Specifically, the carbon composition of the fatty acids used in the examples is shown in Table 1 below.

[0097] Table 1. Composition of fatty acids

[0098]

[0099] Note: a The name of the fatty acid here represents a general term;

[0100] b Fatty acid names here refer to pure fatty acids with a specified number of carbon atoms.

[0101] 2) In addition, in the present invention, the relevant indicators of the obtained product are detected by the following detection methods:

[0102] Product acid value determination method: AOCS Te 1a-64;

[0103] Product hydroxyl value ...

Embodiment 1

[0111] In a 250mL four-necked flask equipped with a stirrer, add 0.25mol of palmitic acid (1698) and 0.325mol of isooctyl alcohol, add 0.05wt% activated carbon-loaded sodium bisulfate, and protect it with nitrogen gas. The reaction temperature was raised to 150°C, and after 5 hours of heat preservation, vacuum distillation was carried out to remove excess alcohol. Cool to room temperature and filter to obtain a crude product with an acid value of 0.15 mgKOH / g. The crude product was washed three times with 200 mL of water, dehydrated in vacuum, added 0.2 wt% activated carbon, stirred for 1 h, and filtered to obtain the product of isooctyl palmitate. The acid value of the product is 0.06mgKOH / g, the hydroxyl value is 0.2mgKOH / g, and the color is 11. The esterification rate was 99.96%, and the yield was 95.9%.

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Abstract

The invention relates to a preparation process of fatty acid isooctyl ester. The preparation process comprises the step of carrying out a reaction on fatty acid and isooctanol in the presence of a catalyst, wherein the catalyst is selected from acid sulfate, supported acid sulfate and supported p-toluenesulfonic acid as well as combination thereof. The process provided by the invention at least has one of the advantages of being high in reaction conversion rate, low in use level of isooctanol and catalyst, mild in reaction condition, free from or few in side reactions, simple in post-treatment process and environmentally friendly.

Description

technical field [0001] The invention relates to a preparation process of fatty acid isooctyl esters, in particular to a preparation process of fatty acid isooctyl esters whose main components are sixteen-carbon saturated fatty acid and / or eighteen-carbon saturated fatty acid. Background technique [0002] Isooctyl ester of 16-18 carbon saturated fatty acid (hereinafter referred to as isooctyl fatty acid ester), is an odorless transparent liquid, not easy to oxidize, does not change color, has good stability, and has good emollient, antiperspirant and permeability properties. Non-toxic, non-irritating and non-allergic non-ionic surfactants are widely used in daily chemical products. At present, the isooctyl fatty acid is in great demand in the daily chemical and plastic processing industries, and it is increasing at a rate of about 10% per year. However, the existing domestic production capacity cannot meet the market demand and relies heavily on imports. Therefore, it is ne...

Claims

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Application Information

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IPC IPC(8): C11C3/02C11C3/00
Inventor 李保国贺林陶梅香姚伟杰潘红梅
Owner 丰益油脂科技(连云港)有限公司
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