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Preparation method of 2,2,4-trimethyl-1,3-pentanediol diisobutyrate

A technology of pentanediol diisobutyrate and trimethyl, which is applied in the field of preparation of plasticizer, 2,2,4-trimethyl-1,3-pentanediol diisobutyrate, can Solve the problems of difficult acquisition of raw materials, complex process, and production limitations, and achieve the effects of convenient production efficiency, simple process flow, and low cost

Active Publication Date: 2016-10-12
谦信化工集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method is either complicated in the process or difficult to obtain raw materials, so it is limited in the industrial production of 2,2,4-trimethyl-1,3-pentanediol diisobutyrate

Method used

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  • Preparation method of 2,2,4-trimethyl-1,3-pentanediol diisobutyrate

Examples

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Embodiment 1

[0029] like figure 1 As shown, the present invention discloses a preparation method of 2,2,4-trimethyl-1,3-pentanediol diisobutyrate, comprising the following steps:

[0030] A. Using isobutyraldehyde as raw material, add alkali catalyst sodium hydroxide, potassium hydroxide, magnesium hydroxide, barium hydroxide, calcium hydroxide, and zinc hydroxide mixture, and control the alkali catalyst to be 5% of the mass of isobutyraldehyde. Butyraldehyde and alkali catalyst are added to the first reaction kettle to carry out a first-stage reaction, and the reaction temperature of the first-stage reaction is controlled to be 45°C for 2 hours; then the temperature is raised to carry out the second-stage reaction, and the reaction temperature of the second-stage reaction is controlled to be 75°C for 2.5 hours to generate 2, The crude product of 2,4-trimethyl-1,3-pentanediol, then pump the crude product of 2,2,4-trimethyl-1,3-pentanediol through the bottom of the first reaction kettle In...

Embodiment 2

[0038] like figure 1 As shown, the present invention discloses a preparation method of 2,2,4-trimethyl-1,3-pentanediol diisobutyrate, comprising the following steps:

[0039] A. Use isobutyraldehyde as raw material, add alkali catalyst magnesium alkoxide, calcium alkoxide, sodium alkoxide mixture, control the alkali catalyst to be 3% of the mass of isobutyraldehyde, add isobutyraldehyde and alkali catalyst into the first reaction kettle for a stage of reaction, Control the reaction temperature of the first-stage reaction at 40°C for 3 hours; then raise the temperature to carry out the second-stage reaction, control the reaction temperature of the second-stage reaction at 80°C for 2 hours to generate crude 2,2,4-trimethyl-1,3-pentanediol product, then pump the crude product of 2,2,4-trimethyl-1,3-pentanediol into the acid tower through the bottom of the first reaction kettle, and let it stand after acid recoil, neutralization and extraction Phase separation, the organic phase ...

Embodiment 3

[0047] like figure 1 As shown, the present invention discloses a preparation method of 2,2,4-trimethyl-1,3-pentanediol diisobutyrate, comprising the following steps:

[0048] A. Take isobutyraldehyde as raw material, add alkali catalyst barium alkoxide, control the alkali catalyst to be 1% of the isobutyraldehyde quality, add isobutyraldehyde and alkali catalyst in the first reaction kettle to carry out one-stage reaction, control the reaction temperature of one-stage reaction to be React at 50°C for 2 hours; then raise the temperature to carry out the second-stage reaction, control the reaction temperature of the second-stage reaction at 70°C for 2.5 hours to generate 2,2,4-trimethyl-1,3-pentanediol crude product, then put 2, The crude product of 2,4-trimethyl-1,3-pentanediol is pumped into the acid tower through the bottom of the first reaction kettle. The pump is pumped into the first rectification tower, and the brine-containing phase is pumped into the wastewater treatme...

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Abstract

The invention discloses a preparation method of 2,2,4-trimethyl-1,3-pentanediol diisobutyrate. The preparation method includes the steps that isobutyraldehyde serves as the raw material and is converted into 2,2,4-trimethyl-1,3-pentanediol with a base catalyst, and then, 2,4-trimethyl-1,3-pentanediol is converted into 2,2,4-trimethyl-1,3-pentanediol diisobutyrate with an acid catalyst. The preparation method of 2,2,4-trimethyl-1,3-pentanediol diisobutyrate has the advantages that the material source is wide, the technological process is simple, the conversion rate is high, the product purity is high, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, and mainly relates to a plasticizer, in particular to a preparation method of 2,2,4-trimethyl-1,3-pentanediol diisobutyrate. Background technique [0002] Plasticizers have played a huge role in the development of the plastics industry, but plasticizers have also caused varying degrees of pollution and harm to the environment after use. Among them, phthalate-based plasticizers have been detected in the atmosphere, water, soil, food, animals and plants in many countries and regions around the world, thus causing cancer in animals. Therefore, it has become a consensus in the industry to restrict the application of phthalate plasticizers in food packaging, medical equipment, children's toys and other products, and to use green and non-toxic substitutes. [0003] In the study of detoxification of plasticizers, aliphatic dibasic acid esters are the main category, and 2,2,4-trimethyl-1,3-pentan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/38C07C29/80C07C29/86C07C31/20C07C67/08C07C67/54C07C67/58C07C69/28
CPCC07C29/38C07C29/80C07C29/86C07C67/08C07C67/54C07C67/58C07C31/20C07C69/28
Inventor 赵楚榜于冬娥董杨
Owner 谦信化工集团有限公司
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