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Pure Neem oil extraction methods:

Quality of neem oil depends on the type of extraction. Manufacturing of neem oil includes the collection of raw materials for the extraction and selection of extraction method. Neem oil is extracted from neem leaf and need seed. Neem seed is widely used in the extraction process instead of neem leaf as the oil content is found to be more in seeds than in the leaf.

Neem oil extraction is done by Mechanical pressing, Steam pressure extraction and Solvent extraction. Primary process of extraction consists of grade wise separation of seeds. Grading of seeds is done according to the amount of oil content in the seeds and with sizes as well.

Firstly, the fruits are collected in a drum, and the kernels are separated to obtain the seeds. Later the seeds are woven dried and then feed into the oil extracting machine in case of mechanical pressing method. The neem oil is obtained by pressing it mechanically and collected in a drum. Thus filtration is done to remove the various unwanted particles left in the extracted oil in order to obtain pure neem oil.

In case of Steam pressure extraction method, the neem seeds after the drying process are feed into the steam boiler. This process makes the extraction process easier. The seeds get swollen by steaming thus the oil in squeezing becomes easy. The process of steaming is accompanied by increasing of pressure in the boiler which drives the oil out from the seed without any pressing. In some industries, the left seed's kernels after the steam boiling is pressed to further extraction of oil up to 98% leaving just the outer layer of the seeds. The same filtering process is followed as done in the mechanical pressing method.

In solvent extraction method, solvents like petrol or white gasoline is mixed with the seeds after woven drying. The solvents help in extracting the neem oil out of the kernel up to certain percent. Added to that the neem seeds are pressed if needed. The resulting oil is stored in a silo where the pure neem oil is recovered from the crude one. Other than these above mentioned methods, a latest extraction method called cold pressing is being adopted in many neem oil manufacturing industries. In the method of cold pressing, it is seen that the purest form of neem oil is obtained along with the presence of active compounds. The oil extracted using cold press method seems to be lighter in color as well as odor when compared with other methods.

Author: Adam Teaser - neem oil articles

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