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[Chemical Knowledge]：Manufacturing method and process of methyl isobutyl ketone

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Methyl isobutyl ketone (MIBK) is an important organic chemical raw material, which is widely used in coatings, inks, adhesives, cleaning agents and other fields. This article will introduce the manufacturing method of methyl isobutyl ketone, including raw material preparation, reaction process, post-treatment and other links.

1. Raw Material Preparation

The manufacture of methyl isobutyl ketone requires the preparation of the following raw materials: acetone, methanol, and sulfuric acid. The ratio of acetone to methanol is 1:1.2, and the amount of sulfuric acid is 10% of the mass of acetone.

2. Reaction Process

1. After mixing acetone and methanol, add sulfuric acid catalyst and stir evenly.

2. the mixture is heated to 60-70 DEG C, keep temperature reaction 2-3 hours. During the reaction, constant stirring is required to prevent the material from precipitating.

3. After completion of the reaction, the reaction solution was cooled to room temperature, and then the phases were separated to obtain a crude methyl isobutyl ketone.

3. post-treatment

1. the crude methyl isobutyl ketone is washed with water to remove the acidic substance and water.

2 After washing with water, the mixture was dried over anhydrous magnesium sulfate and filtered to obtain pure methyl isobutyl ketone.

4. precautions

1. In the manufacturing process, pay attention to control the reaction temperature and time to prevent the appearance of by-products.

2. The amount of sulfuric acid catalyst should be appropriate, too much will lead to equipment corrosion and waste generation, too little will affect the reaction efficiency.

3. In the post-treatment process, to ensure the purity of methyl isobutyl ketone, in order to avoid affecting its use effect.

In short, the manufacture of methyl isobutyl ketone requires strict control of the proportion of raw materials, reaction conditions and post-treatment process to ensure the quality and purity of the product. At the same time, it is necessary to pay attention to safety production and environmental protection requirements to ensure the sustainability and stability of the manufacturing process.

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