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[Chemical Knowledge]：Manufacturing method and process of oleic acid

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Oleic acid is an important chemical raw material, widely used in plastics, rubber, grease, cosmetics and other fields. This article will introduce the production methods of oleic acid, including vegetable oil extraction, chemical synthesis and microbial fermentation.

1. vegetable oil extraction method

vegetable oil extraction method is one of the commonly used oleic acid manufacturing methods, mainly from vegetable oil to extract oleic acid. The content of oleic acid in different vegetable oils is different, and the content of oleic acid in vegetable oils such as linseed oil and sunflower oil is higher. The manufacturing process mainly includes the following steps:

1. Vegetable oil extraction: Extract oil from plant seeds by pressing or solvent extraction.

2. oil refining: remove impurities in oil, such as phospholipids, pigments, free fatty acids, etc.

3. Oleic acid separation: through fractionation or winterization and other methods, the separation of oleic acid from oil.

2. chemical synthesis method

chemical synthesis method is a method of synthesizing oleic acid through chemical reaction, mainly including the following:

1. Olefin oxidation method: oleic acid is prepared by oxidation reaction using olefin as raw material.

2. Carboxylation: Oleic acid is prepared from alkenes or alkanes by carboxylation.

3. Transesterification method: using triglyceride as raw material, oleic acid is prepared by transesterification reaction.

3. microbial fermentation

microbial fermentation is a method for preparing oleic acid by microbial action. Some microorganisms can use sugars or hydrocarbons as carbon sources to produce oleic acid through metabolic pathways. The manufacturing process mainly includes the following steps:

1. strain breeding: screening can produce high amount of oleic acid of microbial strains.

2. fermentation culture: microbial fermentation culture under suitable conditions, so that the strain produces oleic acid.

3. Oleic acid extraction: oleic acid is extracted from the fermentation broth by centrifugation, extraction and other methods.

4. other manufacturing methods

In addition to the above three methods, there are some other manufacturing methods, such as enzymatic hydrolysis, photochemical method, etc. The application of these methods is relatively small, but it is also used in some specific fields.

In short, there are many methods for manufacturing oleic acid, and the advantages and disadvantages and scope of application of different methods are different. In actual production, the appropriate manufacturing method should be selected according to the specific situation to ensure product quality and economic benefits.

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