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[Chemical Knowledge]：Production and manufacturing method and process of cyclopropyl ketone

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Manufacturing method
of cyclopropyl methyl ketone
cyclopropyl methyl ketone is an important organic chemical raw material, which is widely used in medicine, pesticide, spice and other fields. This article will introduce the manufacturing method of cyclopropyl ketone, including raw material preparation, reaction steps, post-treatment and so on.

1. Raw Material Preparation

The main raw materials for the manufacture of cyclopropyl ketone are propylene ketone and methanol. Acrylenone is a colorless transparent liquid with pungent odor, insoluble in water and soluble in organic solvents. Methanol is a colorless, transparent, volatile liquid with a strong smell of alcohol.

2. Reaction Step

1. Acid Catalytic Reaction

Propylene ketone and methanol are added into a reactor according to a certain molar ratio, an appropriate amount of sulfuric acid is added as a catalyst, the reaction temperature is controlled at 60-80 ° C, and the reaction time is about 6-8 hours. Under the action of acid catalysis, the esterification reaction of propylene ketone and methanol occurs to produce cyclopropyl ketone and water.

2. Neutralization and dehydration

After the reaction is completed, the reaction solution is cooled to room temperature, an appropriate amount of alkali solution is added to neutralize the sulfuric acid catalyst, and the pH value is adjusted to neutral. Then, the reaction liquid was distilled to separate cyclopropyl ketone and water.

3. Post-treatment

1. Distillation and purification

The separated cyclopropyl ketone is distilled and purified, and the fraction within the boiling point range is collected to obtain a higher purity cyclopropyl ketone product.

2. Quality inspection

carries out quality inspection on the prepared cyclopropyl ketone products, including purity, moisture, acidity and other indicators to ensure that the product quality meets the relevant standards.

4. precautions

1. In the manufacturing process, the reaction temperature and time should be strictly controlled to avoid excessive reaction or insufficient reaction.
2. In the process of neutralization and dehydration, the pH value should be controlled within the appropriate range to ensure the purity of the product.
3. In the process of distillation and purification, ensure that the equipment is well sealed to prevent product volatilization loss.
4. During the whole manufacturing process, attention should be paid to safe operation to avoid accidents.

In short, the manufacturing method of cyclopropanone involves multiple steps and precautions, and the reaction conditions and post-treatment methods need to be strictly controlled to ensure product quality and production safety.

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