What are the extraction methods of cottonseed oil, and how to choose the appropriate cottonseed oil extraction equipment?

There are two main extraction methods of cottonseed oil: one is the pretreatment pressing method, and the other is the solvent extraction method. Different extraction methods use different cottonseed oil extraction equipment, so how to choose the appropriate cottonseed oil extraction equipment? This article will give you the answer.

• The first method: pretreatment pressing method

First, a special wind separator is used to remove light impurities and heavy impurities in the cottonseed, and the cleaned cottonseed needs to be shelled, and a disc sheller is used to achieve the desired effect. Then a kernel shell separator is needed to separate the shell from the kernel, so you get a clean kernel for the next step. The cleaned kernels need a roaster to make them soft and easy to press. The most important thing is the pressing procedure, choose the right oil press machine, so that the oil yield is high and more economical. Cottonseed oil is filtered through a filter press to remove impurities and obtain cleaner crude oil.

• The second method: solvent extraction method

This method has a relatively low residual oil rate and is widely used in oil extraction. The pretreatment stage is the same as the pressing process. The first process of extraction is the solvent extraction section. The second process is miscella evaporation and stripping. The purpose is to remove the solid coarse powder and separation solvent in the oil, so as to obtain relatively pure extracted crude oil. The third step is to desolventize the baked meal. The wet powder coming out of the extractor usually contains 20%-40% solvent and must be recovered by dissolution and drying. The final step is solvent recovery.

So how to choose the right equipment to extract cottonseed oil? One is based on the amount of raw materials, and the other is based on budget investment.

If your processing capacity is small and the budget is limited, it is recommended that you choose the pretreatment pressing method. The required equipment includes: cleaning equipment, shelling machine, kernel shell separation equipment, roaster, oil press, filter, etc.. The solvent extraction method is suitable for cottonseed oil extraction projects with a large amount of raw materials and high investment. In addition to pressing equipment, we also need to use solvent extraction equipment.