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[Chemical Knowledge]：Production and manufacturing method and process flow of secondary butanol

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The manufacturing method
of secondary butanol
secondary butanol, also known as 2-butanol, is an important organic chemical raw material, widely used in medicine, pesticides, plastics, coatings and other fields. With the continuous development of science and technology, the manufacturing method of sec-butanol is also continuously improved and optimized. This article will introduce the manufacturing method of sec-butanol in detail.

1. Propylene carbonyl synthesis

Propylene carbonyl synthesis is currently the main method for the production of secondary butanol, the reaction principle is under the action of a catalyst, propylene and carbon monoxide carbonylation reaction, the generation of butyraldehyde, and then butyraldehyde in the presence of hydrogen hydrogenation to produce secondary butanol. This method has the advantages of easy availability of raw materials, mild reaction conditions and high selectivity, so it is widely used in industrial production. The specific steps of

are as follows:

1. Propylene, carbon monoxide and hydrogen are mixed according to a certain proportion, preheated to a certain temperature and then enter the reactor.

2. in the reactor, under the action of catalyst, propylene and carbon monoxide carbonylation reaction to produce butyraldehyde.

3. Butyraldehyde is hydrogenated in the presence of hydrogen to produce sec-butanol.

4. The reaction product is condensed and separated to obtain secondary butanol with high purity.

2. acetaldehyde condensation method

acetaldehyde condensation method is a traditional method for the production of secondary butanol. Its reaction principle is to condense two molecules of acetaldehyde under the action of an acidic catalyst to produce but-2-enal, and then but-2-enal is hydrogenated in the presence of hydrogen to produce secondary butanol. The process of this method is cumbersome and requires the use of a large amount of acidic catalyst, so it is gradually replaced by the propylene carbonyl synthesis method.

specific steps are as follows:

1. acetaldehyde and acidic catalyst are mixed, heated to a certain temperature and then subjected to condensation reaction to generate but-2-enal.

2. Buta-2-enal is mixed with hydrogen for hydrogenation to produce sec-butanol.

3. The reaction product is separated and purified to obtain secondary butanol with high purity.

3. biological fermentation method

biological fermentation method is a new method for the production of secondary butanol, the principle is the use of microbial fermentation production of secondary butanol. This method has the advantages of environmental protection and energy saving, but it is still in the research stage and has not yet realized industrial production.

specific steps are as follows:

1. glucose, yeast extract and other nutrients mixed with microbial strains, fermentation culture.

2. Microorganisms convert glucose to sec-butanol during fermentation.

3. Secondary butanol having a relatively high purity is obtained by steps such as separation and purification. Summary of

4. There are many kinds of manufacturing methods of

-butyl alcohol, among which propylene carbonyl synthesis is the main production method at present, which has the advantages of easy access to raw materials, mild reaction conditions and high selectivity. With the continuous progress of science and technology, new production methods such as biological fermentation are also constantly researched and developed. When choosing a production method, you should consider comprehensively according to the actual situation and choose the most suitable production method.

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