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Method for preparing 4-methyl-4-hydroxyl-2-pentanone by using solid base as catalyst

A technology of hydroxyl and pentanone, which is applied in the preparation of carbon-based compounds, chemical instruments and methods, and the preparation of organic compounds. It can solve the problems of design and application that have not been reported in literature, and achieve the problem of wastewater treatment and high conversion rate. , cost-saving effect

Inactive Publication Date: 2010-03-03
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The results of the literature search show that there is no literature report on the report of this catalyst and the design and application of its unique process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Pour 145g of acetone with a purity of 99.5% into a 250ml three-necked flask, use X-1 as a reactor, add 2-5 grams of catalyst A in the reactor, and install a device Y-1 that can remove the water produced by the reaction system. The still was heated to reflux, and sampling and analysis were carried out every 0.5h of reflux until equilibrium was reached. After reacting for 5-8h, the product conversion rate was 85%.

Embodiment 2

[0017] Pour 145g of acetone with a purity of 99.5% into a 250ml three-necked flask, adopt X-1 as a reactor, add 2-5 grams of catalyst A in the reactor, heat the distillation pot to reflux, and carry out sampling analysis in a certain amount at each reflux, until a balance is reached. The product conversion rate is 65%.

Embodiment 3

[0019] Pour 145g of acetone with a purity of 99.5% into a 250ml three-necked flask, use X-1 as a reactor, add 2-5 grams of catalyst A in the reactor, and install a device Y-1 that can remove the water produced by the reaction system. The still is heated to reflux, and a certain amount of reflux is sampled and analyzed until equilibrium is reached. Product conversion rate 55%.

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Abstract

The invention discloses synthesis of a novel catalyst and an application method thereof in catalyzing condensation of acetone and hydroxyaldehyde. The method comprises the following steps: adding acetone into a distillation kettle connected with a reactor and an apparatus for refluxing to remove water; then adding little catalyst into the reactor, carrying out reflux reaction for a certain time ata certain temperature when mixing, sampling to analyze; when the reaction is balanced, ending the reaction to obtain the product in the reaction kettle. The substance in the reactor is material acetone that is not adequately reacted and can be used as the reactant of next batch of reaction.

Description

technical field [0001] The invention relates to a new process for producing 4-methyl-4-hydroxyl-2-pentanone, which realizes the effective separation of raw materials and products, and the catalyst is in solid phase and does not dissolve in the raw materials and products. Background technique [0002] 4-methyl-4-hydroxy-2-pentanone, commonly known as diacetone alcohol, is a colorless liquid with an aromatic smell, and its molecular formula is It has a specific gravity of 0.9357 and a boiling point of 167.9°C. It is an excellent solvent and can be miscible with water, alcohol, chloroform, ether, ester and aromatic hydrocarbons. It is a kind of alcohol and ketone with low volatilization rate; it is widely used in coatings and varnishes Thinners and anti-whitening agents for coil coatings, wire enamels, natural and artificial leather and organic synthesis. The current production process uses acetone as a raw material and mostly uses a strong base with a lower concentration as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C49/17C07C45/72B01J35/02
Inventor 郑凯聂晓庆吴功德张亚林刘琳袁雪飞
Owner NANJING INST OF TECH
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