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[Chemical Knowledge]：Production process and preparation method of methyl ethyl ketone (MEK)

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Methyl ethyl ketone (MEK) is an important solvent and chemical raw material, which is widely used in various fields. This article will introduce the production process and preparation method of butanone methyl ethyl ketone.

1. butanone methyl ethyl ketone production process

butanone methyl ethyl ketone production process mainly uses butanone hydroxide and lithium benzoyl acetate reduction method two. The butanone hydroxide method is the most widely used production process. The main process of

butanone hydroxide is as follows:

1. isobutylene and air are sent into an oxygenation reactor, and the oxygenation reaction occurs under the addition of hydrogen peroxide catalyst to generate isobutylene ketone.

2. Isobutylene ketone and water vapor are cooled by a cooler and then enter the peroxide gas phase reactor. After oxidation, methyl ethyl ketone and acetone are generated.

3. The potassium hydroxide solution at the outlet of the reactor neutralizes the produced methyl ethyl ketone to produce methyl ethyl ketone.

2. The preparation method of methyl ethyl ketone methyl ethyl ketone

1. Preparation of
from isobutylene The process of preparing methyl ethyl ketone from isobutylene methyl ethyl ketone is as follows:

1. Reaction of isobutylene and acetylacetone under the action of a catalyst to generate methyl ethyl ketone.

2. the reaction solution is separated and treated to obtain pure butanone methyl ethyl ketone.

this preparation method can reduce production steps and save production costs, the reaction conditions need to be precisely controlled, and the selection and use of catalysts also have higher requirements.

2. Synthesis of

from acetone The process of synthesizing butanone methyl ethyl ketone from acetone is as follows:

1. Catalytic esterification of acetone and sulfuric acid to produce acetone sulfate.

2. Acetone sulfate is hydroxylated with alumina to form methacetonate.

3. Under the action of catalyst, methyl acetylacetone and isobutylene react to generate methyl ethyl ketone.

this method requires multiple steps, the production cost is high, but the requirements for reaction conditions and material selection are low, and it is suitable for some small-scale production situations.

summary:

methyl ethyl ketone methyl ethyl ketone is an important substance, its production process and preparation methods have a certain degree of technical difficulty and complexity. Different preparation methods have their own advantages and disadvantages, and need to be selected according to factors such as production scale, equipment and material cost. In production, it is necessary to strictly control the reaction conditions to ensure the quality and stability of the product.