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Process for synthesizing mesityl oxide by catalyzing acetone

A technology of mesityl oxide and acetone, which is applied in the field of catalyzing the synthesis of mesityl oxide from acetone, can solve the problem of high price, achieve the effects of low price, huge application potential, and increased reaction yield

Pending Publication Date: 2022-03-08
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The previous catalysts were either expensive or could not effectively catalyze ketone substrates to obtain unsaturated ketones in one step. Therefore, it is imperative to develop a catalytic system with low price a

Method used

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  • Process for synthesizing mesityl oxide by catalyzing acetone
  • Process for synthesizing mesityl oxide by catalyzing acetone

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Add 5 grams of acetone, 1% molar amount of catalyst, 2 times the molar amount of water-absorbing agent, and 50 grams of toluene into a 100mL reactor and heat at 110°C for 8 hours. After the reaction, the solid is separated by filtration, and the reaction solution is washed by adding water. The organic phase was distilled under reduced pressure to obtain the reaction product, and the experimental yield was calculated.

[0023] Table 1 Reaction situation under different conditions

[0024]

[0025]

Embodiment 2

[0027] With 5 grams of acetone, 2% molar amount of Zn(OAC) 2 , 2 times the molar amount of acetic anhydride, 50 grams of toluene was added to a 100mL reactor and heated at 110°C for 8 hours. After the reaction, the solid was separated by filtration, and the reaction solution was washed with water, and the washed organic phase was distilled under reduced pressure to obtain the reaction product. The yield was 96%.

Embodiment 3

[0029] With 5 grams of acetone, 0.5% molar amount of Zn(OAC) 2 , 2 times the molar amount of acetic anhydride, 50 grams of toluene was added to a 100mL reactor and heated at 110°C for 8 hours. After the reaction, the solid was separated by filtration, and the reaction solution was washed with water, and the washed organic phase was distilled under reduced pressure to obtain the reaction product. The yield was 89%.

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Abstract

The invention discloses a process for synthesizing mesityl oxide by catalyzing acetone, which is characterized in that acetone is subjected to aldol condensation reaction in the presence of a catalyst and a water absorbent to obtain mesityl oxide. The aldol condensation reaction is promoted by using the catalyst and the water absorbent, the reaction activity is high, the reaction time is short, the yield is high, the mesityl oxide can be quickly generated, and the application potential is huge.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a process for catalyzing acetone to synthesize mesityl oxide. Background technique [0002] Aldol condensation reaction is an important organic chemical reaction, which has a wide range of applications in organic synthesis. Intermolecular aldol condensation is often used to synthesize some β-hydroxy compounds, such as 1,3-propanediol, 1,3-butanediol and neopentyl glycol, etc. It can be used as a monomer for the further production of polymers such as spices and drugs, or polymers such as polyethylene terephthalate, polybutylene terephthalate, and polytrimethylene terephthalate; condensation dehydration products α, β-unsaturated aldehydes are oxidized to obtain corresponding carboxylic acids that can be widely used as raw materials for fine chemical production, such as 2,2-dimethylolpropionic acid, which can be used as water-based polyurethane chain extenders and for t...

Claims

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Application Information

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IPC IPC(8): C07C49/203C07C45/74
CPCC07C45/74C07C49/203
Inventor 杨旭高爱红赵相柱王瑞菲唐晓婵张晓霞刘友彬王灏
Owner QINGDAO UNIV OF SCI & TECH
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