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Production of 2,2,4-trimethyl-1,-3-pentadiol mono-isobutyric acid

A technology of pentanediol monoisobutyrate and trimethyl, applied in the field of organic chemical synthesis, can solve the problems of low cost, insufficient output, high single-pass yield, and achieve mild reaction conditions, less equipment corrosion, and single-pass yield. high effect

Inactive Publication Date: 2006-08-16
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The domestic output is less than 7kt, and the output and product quality are far from meeting the development needs of green coatings
Therefore, the existing technology cannot achieve the goals of less by-products, high single-pass yield, low cost, and environmental friendliness at the same time.

Method used

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  • Production of 2,2,4-trimethyl-1,-3-pentadiol mono-isobutyric acid
  • Production of 2,2,4-trimethyl-1,-3-pentadiol mono-isobutyric acid
  • Production of 2,2,4-trimethyl-1,-3-pentadiol mono-isobutyric acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1 Low-temperature condensation pretreatment of isobutyraldehyde

[0024] In a 100ml three-necked flask equipped with a thermometer, a reflux condenser and a constant pressure dropping funnel, add 5g of 5% sodium hydroxide solution, stir magnetically, and under nitrogen protection, normal pressure, and 20°C, within 1h Continuously and slowly add 15 g of isobutyraldehyde dropwise, and continue to react at 35° C. for 4 h after the dropwise addition; stop the reaction, wash with water, stand to separate layers, the lower layer is a water layer, and the upper layer is an oil layer.

[0025] Step 2 Intramolecular Cannizzaro Reaction

[0026] Add the oil layer obtained by the low-temperature condensation pretreatment of isobutyraldehyde into a 100mL three-necked flask equipped with a thermometer and a reflux condenser, add 0.2g of magnesium aluminum hydrotalcite, stir magnetically, and react under nitrogen protection, normal pressure, and 60°C 1h, then heat up to 60-65°C...

Embodiment 2-4

[0033] Example

Embodiment 5-7

[0035] Example

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Abstract

Production of 2,2,4-trimethyl-1,3-pentanediol monoester isobutyrate is carried out by condensation pre-treating isobutyl aldehyde, and Knigcharlo reacting in molecule under the action of hydrotalcite-like solid catalyst to obtain the final product. It has high single-pass recovery rate, gentle reactive condition and no corrosion.

Description

technical field [0001] The invention relates to the technical field of organic chemical synthesis, in particular to a method for preparing 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate using hydrotalcite-like catalysts. Background technique [0002] 2,2,4-Trimethyl-1,3-pentanediol monoisobutyrate is a water-insoluble high-boiling diol ester, which has unique advantages when used in solvents and plasticizers. When used in paint and latex, it has good resin compatibility, viscosity and low pollution. It is a safe and efficient new type of film-forming agent suitable for various synthetic resin latex paints, and it is also an ideal assistant for green paints. It is an important chemical raw material. As the world's largest manufacturer of film-forming agents for latex paints, EASTMAN Corporation of the United States has launched efficient and safe Texanol alcohol esters, which have already occupied a large market share in China. The domestic output is less than 7kt, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/28C07C67/44
Inventor 杨建国于心玉高珊梁学正程文萍刘彩华何鸣元
Owner EAST CHINA NORMAL UNIV
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