Preparation method of triethylene glycol di-n-octoate

A technology of triethylene glycol and n-octanoate, which is applied in the field of ester plasticizers, can solve the problems of harshness, high production cost, and complicated preparation conditions, and achieve the effects of low cost, reduced production cost, and simple preparation method

Pending Publication Date: 2021-12-07
孟永财
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is: in order to solve the deficiencies such as the high production cost of triethylene glycol dicarboxylate as plasticizer in the prior art, complicated preparation conditions / harsh etc., thereby provide a kind of triethylene glycol dicarboxylate The preparation method of n-octanoic acid ester

Method used

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  • Preparation method of triethylene glycol di-n-octoate
  • Preparation method of triethylene glycol di-n-octoate
  • Preparation method of triethylene glycol di-n-octoate

Examples

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Embodiment 1

[0027] The present embodiment provides a kind of preparation method of triethylene glycol di-n-octanoate, comprising the following steps:

[0028] S1: In a heated 10m equipped with stirrer, internal thermometer and water separator 3 In the reaction pot, charge triethylene glycol, n-octanoic acid with an excess of 20 mol% based on the hydroxyl group to be esterified, and tetraisobutyl titanate accounting for 0.04 mol% of the molar amount of triethylene glycol, start stirring, then turn on condensed water and Heating to make it react at 125°C, and removing the formed reaction water on the oil-water separator, and continuously weighing the reaction water discharged from the oil-water separator until no more reaction water is generated, then the reaction is terminated;

[0029] S2: Move the reaction materials into the distillation kettle, and at the same time turn on the vacuum pump unit to carry out vacuum distillation to remove n-octanoic acid, collect the condensate when the va...

Embodiment 2

[0034] The present embodiment provides a kind of preparation method of triethylene glycol di-n-octanoate, comprising the following steps:

[0035] S1: In a heated 10m equipped with stirrer, internal thermometer and water separator 3 In a 1-liter reaction pot, put triethylene glycol, n-octanoic acid with an excess of 30 mol% based on the hydroxyl group to be esterified, and tetraisobutyl titanate accounting for 0.02 mol% of the molar amount of triethylene glycol, start stirring, and then turn on the condensate and heating to make it react at 120°C, and remove the formed reaction water on the oil-water separator, and continuously weigh the reaction water discharged from the oil-water separator until no more reaction water is generated, then end the reaction;

[0036] S2: Move the reaction materials into the distillation kettle, and at the same time turn on the vacuum pump unit to carry out vacuum distillation to remove n-octanoic acid, collect the condensate when the vacuum degr...

Embodiment 3

[0039] The present embodiment provides a kind of preparation method of triethylene glycol di-n-octanoate, comprising the following steps:

[0040] S1: In a heated 10m equipped with stirrer, internal thermometer and water separator 3In the reaction pot, charge triethylene glycol, n-octanoic acid with an excess of 25 mol% based on the hydroxyl group to be esterified, and tetrabutyl titanate accounting for 0.03 mol% of the molar amount of triethylene glycol, start stirring, then turn on condensed water and heating , making it react at 130°C, and removing the formed reaction water on the oil-water separator, and continuously weighing the reaction water discharged through the oil-water separator until no more reaction water is generated, the reaction is terminated;

[0041] S2: Move the reaction materials into the distillation kettle, and at the same time turn on the vacuum pump unit to carry out vacuum distillation to remove n-octanoic acid, collect the condensate when the vacuum ...

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Abstract

The invention relates to a preparation method of triethylene glycol di-n-octoate, which comprises the following steps: S1, adding n-caprylic acid into triethylene glycol, and under the action of a catalyst, raising the temperature to 120-130 DEG C for esterification reaction, wherein the catalyst is tetrabutyl titanate and / or tetraisobutyl titanate; S2, after the esterification reaction is finished, removing n-caprylic acid through reduced pressure distillation to obtain a triethylene glycol di-n-caprylate liquid crude product; and S3, neutralizing, washing and dehydrating the triethylene glycol di-n-octoate liquid crude product, removing residual moisture and impurities through a film evaporator, and performing molecular distillation to obtain a triethylene glycol di-n-octoate finished product.

Description

technical field [0001] The application belongs to the technical field of ester plasticizers, in particular to a preparation method of triethylene glycol di-n-octanoate. Background technique [0002] Plasticizers are substances added to increase plasticity, fluidity and flexibility of finished products when processing high polymers such as rubber, plastics, and coatings. The world's largest producer and consumer of durable goods. Triethylene glycol dicarboxylate is a kind of plasticizer especially suitable for the processing of polyvinyl butyral (PVB). Caprylate is a solvent-based cold-resistant plasticizer, which has excellent low temperature resistance, durability, oil resistance, ultraviolet radiation resistance and antistatic properties, and has the characteristics of low viscosity and certain lubricity. Its molecular structure can make plastic products It has good chroma and transparency, and its polarity is similar to that of resin, so it has good compatibility with r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C67/48C07C67/54C07C69/28
CPCC07C67/08C07C67/48C07C67/54C07C69/28
Inventor 孟永财孟爱国
Owner 孟永财
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