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Preparation method of 2,2,4-trimethyl-1,3 pentanediol alkyl isobutyrate ethyl hexoate

A technology of pentanediol isobutyrate and pentanediol monoisobutyrate, which is applied in the field of preparation of 2,2,4-trimethyl-1,3-pentanediol isobutyrate isooctanoate , can solve the problem of few researches, and achieve the effect of streamlined process, moderate price and few reaction steps

Inactive Publication Date: 2018-02-09
RUNTAI CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is widely used in various PVC resin products, inks, pigments and EVA emulsions. It is a high-boiling film-forming aid for water-based acrylic emulsion coatings and an indispensable raw material for the preparation of zero-VOC water-based acrylic emulsion coatings. However, currently 2,2 , The preparation of 4-trimethyl-1,3-pentanediol isobutyrate isocaprylate has been rarely studied

Method used

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  • Preparation method of 2,2,4-trimethyl-1,3 pentanediol alkyl isobutyrate ethyl hexoate

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Experimental program
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Effect test

Embodiment 1

[0018] A kind of preparation method of 2,2,4-trimethyl-1,3 pentanediol isobutyrate isooctanoate, with 2,2,4-trimethyl-1,3 pentanediol monoisobutyrate Ester and isooctanoic acid are reactants, which are prepared by esterification under acidic conditions. The acidic catalyst selected is sulfuric acid, and the amount of sulfuric acid is 2,2,4-trimethyl-1,3-pentanediol monoiso 0.4% of the amount of butyrate, the molar ratio of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate and isooctanoic acid is 1.1:1;

[0019] Above-mentioned a kind of preparation method of 2,2,4-trimethyl-1,3 pentanediol isobutyrate isooctanoate, concrete operation steps are as follows:

[0020] Weigh 216g2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, 158g isooctanoic acid and 100g cyclohexane, put them into a 1000ml three-necked flask, install a condenser, a reflux water separator and Thermometer, start stirring at a speed of 70~80r / min, add 0.9g of sulfuric acid while stirring, close the feeding port, slo...

Embodiment 2

[0022] A kind of preparation method of 2,2,4-trimethyl-1,3 pentanediol isobutyrate isooctanoate, with 2,2,4-trimethyl-1,3 pentanediol monoisobutyrate Ester and isooctanoic acid are reactants, which are prepared by esterification under acidic conditions. The acidic catalyst selected is sulfuric acid, and the amount of sulfuric acid is 2,2,4-trimethyl-1,3-pentanediol monoiso 5% of the amount of butyrate, the molar ratio of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate and isooctanoic acid is 1.1:1;

[0023] Above-mentioned a kind of preparation method of 2,2,4-trimethyl-1,3 pentanediol isobutyrate isooctanoate, concrete operation steps are as follows:

[0024] Weigh 216g2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, 158g isooctanoic acid and 100g cyclohexane, put them into a 1000ml three-necked flask, install a condenser, a reflux water separator and Thermometer, start stirring at a speed of 70~80r / min, add 11g of sulfuric acid while stirring, close the feeding port, and sl...

Embodiment 3

[0026] A kind of preparation method of 2,2,4-trimethyl-1,3 pentanediol isobutyrate isooctanoate, with 2,2,4-trimethyl-1,3 pentanediol monoisobutyrate Ester and isooctanoic acid are reactants, which are prepared by esterification under acidic conditions. The acidic catalyst selected is p-toluenesulfonic acid, and the amount of p-toluenesulfonic acid is 2,2,4-trimethyl-1, 5% of the amount of 3-pentanediol monoisobutyrate, the molar ratio of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate and isooctanoic acid is 2:1;

[0027] Above-mentioned a kind of preparation method of 2,2,4-trimethyl-1,3 pentanediol isobutyrate isooctanoate, concrete operation steps are as follows:

[0028] Weigh 216g2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, 288g isooctanoic acid and 100g cyclohexane, put them into a 1000ml three-necked flask, install a condenser, a reflux water separator and Thermometer, start stirring at a speed of 70~80r / min, add 11g of p-toluenesulfonic acid while stirring, close...

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Abstract

The invention discloses a preparation method of 2,2,4-trimethyl-1,3 pentanediol alkyl isobutyrate ethyl hexoate. 2,2,4-trimethyl-1,3 pentanediol monoisobutyrate and isocaprylic acid are used as reactants, and esterification reaction is performed under the acidic condition to obtain the 2,2,4-trimethyl-1,3 pentanediol alkyl isobutyrate ethyl hexoate. The preparation method has the advantages that few reaction steps are included, the process is simple, the reactants are wide in source and moderate in price, and large-scale production can be achieved; the content of the prepared final product 2,2,4-trimethyl-1,3 pentanediol alkyl isobutyrate ethyl hexoate is higher than 99%, the requirements of industrial products are met; no side product is produced in the reaction process except water, andthe environmental protection requirement is met.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a preparation method of 2,2,4-trimethyl-1,3-pentanediol isobutyrate isooctanoate. Background technique [0002] 2,2,4-Trimethyl-1,3-pentanediol isobutyrate isooctanoate is a non-phthalic environment-friendly plasticizer, which is used for polyvinyl chloride (PVC), polyurethane (PU ) and other resin multi-purpose environmental modifiers, with low viscosity, low density, low freezing point, hydrolysis resistance, colorless and transparent, high stability, safety and non-toxic, etc., this plasticizer meets the requirements of regulations and standards, its The non-toxic nature reassures many toy manufacturers and consumers. With low initial tack and excellent viscosity stability and processability, this plasticizer can meet high-speed molding production efficiency and cycle time requirements, and can guarantee consistent thickness. Therefore, it is widely used in various PVC resin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/28
CPCC07C67/08C07C69/28
Inventor 於宁
Owner RUNTAI CHEM CO LTD