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

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Manufacturing Method

of Heptane Heptane is a common chemical raw material, widely used in fuels, solvents and chemical synthesis. Heptane is mainly produced by a petroleum separation method, a synthetic method, a biological method, and the like. This article will detail these three manufacturing methods.

1. petroleum separation

petroleum separation is the main way to obtain heptane, which can be separated from petroleum through distillation, cracking and other steps in the petroleum refining process. Specifically, the oil separation method mainly includes the following steps:

1. Crude oil pretreatment: crude oil is subjected to desulfurization, dehydration and other treatments to ensure the smooth progress of the subsequent processing process.
2. Atmospheric distillation: The pretreated crude oil is subjected to atmospheric distillation to separate light and heavy fractions. Heptane is mainly present in the light fraction.
3. Vacuum distillation: The heavy fraction obtained by atmospheric distillation is subjected to vacuum distillation to further separate more heptane.

the purity of heptane obtained by petroleum separation is high, it is limited by the quality and yield of crude oil.

2. synthesis

synthesis is a method of converting a raw material into heptane by a chemical reaction. Common synthesis methods include the following:

1. Olefin oligomerization method: low-carbon olefins (such as ethylene, propylene, etc.) are used as raw materials, and oligomerization reaction is carried out under the action of catalyst to generate higher alkanes such as heptane.
2. Alcohol dehydration method: alcohols (such as ethanol, propanol, etc.) are used as raw materials to generate olefins through dehydration reaction, and then further oligomerization reaction to generate heptane.
3. Fischer-Tropsch synthesis method: synthesis gas (mixture of carbon monoxide and hydrogen) is used as raw material, and Fischer-Tropsch synthesis reaction is carried out under catalyst and high pressure conditions to produce hydrocarbon compounds such as heptane. The

synthesis method can adjust the product purity and yield according to the demand, but the production process needs to consume a lot of energy and raw materials.

3. biological method

biological method is a method of converting raw materials into heptane by microbial metabolism. The biological method mainly includes the following steps:

1. microbial screening: screening out microbial strains that can metabolize specific raw materials and produce heptane.
2. Medium preparation: A medium suitable for the growth and metabolism of the microorganism is prepared.
3. Fermentation process: The microbial strain is inoculated into the culture medium, and the fermentation conditions are controlled so that the microorganism is metabolized to produce heptane.
4. Product extraction: Heptane is extracted from the fermentation broth by distillation, extraction, etc.

biological method has the advantages of environmental protection and sustainability, it is still in the research stage and has not yet achieved large-scale industrial production. Summary of

: The manufacturing methods of

heptane mainly include petroleum separation method, synthesis method and biological method. The petroleum separation method is the main way to obtain heptane, but it is limited by the quality and yield of crude oil, the synthetic method can adjust the purity and yield of the product according to the demand, but the production process needs to consume a lot of energy and raw materials, and the biological method has the advantages of environmental protection and sustainability, but it is still in the research stage. In the future, with the continuous progress of technology and the improvement of environmental protection requirements, biological method may become an important development direction of heptane manufacturing.

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