[Chemical Knowledge]：Production process and preparation method of MIBK methyl isobutyl ketone

MIBK methyl isobutyl ketone, is a colorless and transparent, with a strong inhalation pungent odor, organic solvents, usually used in printing inks, coatings, resins, cellulose acetate, rubber, fertilizers, rosin and spices and other fields. In industrial production, MIBK is a very important organic raw material. In this paper, the production process and preparation method of MIBK methyl isobutyl ketone are introduced in detail.

The production process of 1. MIBK methyl isobutyl ketone The production process of
MIBK methyl isobutyl ketone can generally be divided into the following steps:
1. Raw material preparation
The raw materials for producing MIBK are methanol and isobutylene, both of which need to be prepared finely. Methanol is generally produced by synthesis gas, and then refined by distillation, washing and other steps; isobutene is prepared by a series of reactions in the petrochemical industry.
2. Isomerization reaction
After mixing methanol and isobutene in a certain proportion, a catalyst is added to carry out isomerization reaction. The catalyst for the isomerization reaction can be Al2O3, ZnCl2, etc., and the reaction conditions are generally 110-130 ° C., 3-4.5MPa pressure, and the reaction time is 20-24 hours.
3. Separation and purification of the
After the isomerization reaction, the reaction product needs to be separated and purified to obtain high-purity MIBK methyl isobutyl ketone. Commonly used separation and purification methods are distillation, solvent extraction, molecular sieve adsorption, etc.

2. MIBK methyl isobutyl ketone preparation method of

1. distillation method
distillation method is a common method for the preparation of MIBK methyl isobutyl ketone, the method is mainly divided into the following steps:
a. raw material preparation: methanol and isobutylene are mixed according to a certain proportion to prepare the reaction raw materials.
B. Isomerization reaction: the reaction raw materials are added into the reaction kettle, and the isomerization reaction is carried out according to a certain temperature, pressure and reaction time.
c. Separation by distillation: The reaction product was separated by distillation to purify the MIBK methyl isobutyl ketone.
d. Rectification Purification: Multistage distillation purification is often required to obtain higher purity MIBK methyl isobutyl ketone.
2. Solvent extraction method
solvent extraction method is another method for preparing MIBK methyl isobutyl ketone. The method is mainly divided into the following steps:
a. Raw material preparation: methanol and isobutylene are mixed in a certain proportion to prepare reaction raw materials.
B. Isomerization reaction: the reaction raw materials are added into the reaction kettle, and the isomerization reaction is carried out according to a certain temperature, pressure and reaction time.
c. Solvent extraction: During the isomerization reaction, an appropriate amount of solvent is added to the reaction kettle for extracting MIBK methyl isobutyl ketone.
d. Separation by distillation: The extracted solution was separated by distillation to obtain purified MIBK methyl isobutyl ketone.
The above are two common methods for preparing MIBK methyl isobutyl ketone, in which the distillation method and the solvent extraction method have their own characteristics, and different methods can be selected according to actual needs.
3. the application prospects of MIBK methyl isobutyl ketone
MIBK methyl isobutyl ketone has extremely high volatility, ignition and explosive properties, so special attention should be paid to safety during use. However, in industrial production, MIBK methyl isobutyl ketone is widely used, mainly in the following areas:
1. Ink and coating
MIBK methyl isobutyl ketone as a good solvent, is often used in the production of inks and coatings. It can promote the dispersion and stability of macromolecular substances, and increase the uniformity and gloss of the coating.
2. Resin and cellulose acetate fiber
MIBK methyl isobutyl ketone is also one of the important raw materials for resin and cellulose acetate fiber. Its unique molecular structure can promote the hardening and bonding of the material, and improve the strength and durability of the material.
3. Rubber and fertilizer
In the rubber and fertilizer industry, MIBK methyl isobutyl ketone can be used as an auxiliary, intermediate and additive, which helps to improve the quality and performance of products.
4. Rosin and fragrance
Finally, MIBK methyl isobutyl ketone is often used in the production of rosin and fragrance. Its strong inhalation pungent odor and volatility can bring unique fragrance and taste to the product.
overall, MIBK methyl isobutyl ketone has broad application prospects and market potential in industrial production, and is a very important organic raw material.