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[Chemical Knowledge]：Production process and preparation method of diisobutyl ketone (DIBK)

Read： 670 Time：18months ago Source：Transform the World with Simplicity

Diisobutyl ketone (DIBK) is an organic compound that is the reaction product of isopentane and formyl chloride. DIBK has low toxicity, low temperature and excellent solubility, and is widely used in solvents, fragrances, paints, coatings, plastics and glues. This article will introduce the production process and preparation method of DIBK.

1. DIBK production process

DIBK production process mainly has two kinds: one is the methanol hydroxide method, the other is the isopentane oxidation method.

1. Methanol hydroxide

This process is to oxidize methanol and oxygen into formaldehyde and formic acid under the action of copper catalyst, and then esterify formic acid and isopentane into DIBK under the action of acid catalyst.

2.

of isopentane oxidation The process first reacts isopentane and sodium hydroxide at high temperature to form sodium isopentane, and then oxidizes to DIBK with hydrogen peroxide under the action of copper catalyst.

2. DIBK preparation method

DIBK preparation method mainly has three kinds: fractionation method, extraction method and membrane separation method.

1. Fractionation

This method is to mix isopentane and ketone in proportion and heat it to its boiling point, and DIBK is separated from the mixture by fractional distillation. This method is simple, low cost and high output, but it requires high equipment and requires certain production experience and technology.

2. Extraction method

This method is to mix isopentane and ketone in proportion to add an extractant, and then wait for DIBK to be adsorbed on the extractant under stirring, then separate the extractant from the solution, and then purify DIBK by distillation. The extraction efficiency is high, but the production cost is high.

3. Membrane separation method

This method is to mix isopentane and ketone in proportion, and then separate the mixture through reverse osmosis membrane. The separated liquid contains DIBK, and then purified by distillation. This method has the characteristics of high efficiency, low cost and no pollution, and is a sustainable preparation method.

In summary, there are many options for DIBK's production process and preparation method. Different methods have their own advantages and disadvantages. Producers can choose their own methods according to specific conditions. With the continuous improvement of science and technology and environmental protection awareness, more energy-saving and environmentally friendly preparation methods will receive more attention and application.