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Green preparation process for synthesizing 12-carbon alcohol ester by double catalytic system

A technology of dodecyl alcohol ester and catalyst is applied in the field of synthesis and preparation of fine chemical products to achieve the effects of simple production process, elimination of generation and elimination of waste water

Inactive Publication Date: 2017-05-10
GUANGZHOU YINTIAN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly aims at the deficiencies of the current existing production technology, and provides a kind of production technology of dodecyl alcohol ester under the dual catalyst system of supporting type solid base as the main catalyst and supplemented with alkaline ionic liquid. The catalyst is easy to recover, can be reused, has good selectivity, high yield, and basically does not generate waste water during production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] With 72g isobutyraldehyde, supported sodium hydroxide solid catalyst (carrier: montmorillonite, m(NaOH):m(montmorillonite)=0.7) 2.2g and hydroxide 1-butyl-3-methylimidazole 7.2g Add it into a 500mL four-neck flask equipped with a condenser heating device, heat to 60°C, stir for 4 hours, cool to room temperature, filter to separate the catalyst from the reaction system, analyze the reaction mixture, the conversion rate of isobutyraldehyde is 90%, select property of 94%, the unreacted isobutyraldehyde is removed by distillation under reduced pressure, and the product dodecyl alcohol ester with a content of more than 99.5% is continued to be collected.

Embodiment 2

[0020] 72g isobutyraldehyde, supported potassium hydroxide solid catalyst (carrier: activated carbon, m(KOH):m(activated carbon)=0.5), 1.5g and 1-butyl-3-methylimidazole hydroxide 10g were added to the equipped In the 500mL four-neck flask of the condenser heating device, heat to 50°C, stir for 3 hours, cool to room temperature, filter the catalyst to separate from the reaction system, and analyze the reaction mixture. The conversion rate of isobutyraldehyde is 95%, and the selectivity is 97%. Unreacted isobutyraldehyde is removed by distillation under reduced pressure, and the product dodecyl alcohol ester with a content of more than 99.5% is continued to be collected.

Embodiment 3

[0022] With 72g isobutyraldehyde, supported potassium carbonate solid catalyst (carrier: aluminum oxide, m (KCO 3 ): m (aluminum oxide) = 0.25), 3.6g and 8g of 1-methyl-3-methylimidazole hydroxide were added to a 500mL four-neck flask equipped with a condenser tube heating device, heated to 80°C, and stirred for 6h , cooled to room temperature, filtered to separate the catalyst from the reaction system, and analyzed the reaction mixture. The conversion rate of isobutyraldehyde was 88%, and the selectivity was 93%. Dodecyl alcohol esters.

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Abstract

The invention relates to a preparation method of 12-carbon alcohol ester. The method is characterized in that the 12-carbon alcohol ester is directly prepared from isobutyraldehyde by one step under the action of a catalyst; the catalyst is a double catalytic system consisting of supported type solid alkali and alkaline ionic liquid. The process effectively overcome the defect that the catalyst which is sodium alcoholate or sodium hydroxide is removed from the reaction system difficultly, and has the advantages that the catalyst is easy to separate and recover, the selectivity is high, the yield is high and waste water is basically not generated in production.

Description

technical field [0001] The invention belongs to the field of synthesis and preparation of fine chemical products. Specifically, it is a preparation process for preparing film-forming aid dodecyl alcohol ester under a double catalyst system. [0002] technical background [0003] Dodecyl alcohol ester is also known as alcohol ester dodecane or Texanol alcohol ester, the chemical name is 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, it is a non-water-soluble high The colorless and transparent liquid at the boiling point is an emerging green film-forming aid, which is more and more widely used, mainly as a film-forming aid for latex paints, which has received widespread attention. Compared with ordinary film-forming aids, dodecyl alcohol ester has many advantages: good resin compatibility, less dosage, low film-forming temperature, good film leveling and color development, low freezing point, good hydrolytic stability, Low toxicity, it is an excellent latex paint coalescent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/00C07C67/44C07C69/28C07C69/003B01J31/26
CPCC07C67/00C07C67/44B01J31/26B01J35/19C07C69/28C07C69/003
Inventor 姜鹏黄春龙楚庆岩杨海玉谢丽青
Owner GUANGZHOU YINTIAN NEW MATERIAL CO LTD
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