Segregation
Separation
noun, verbal noun
If you take apart and detach it from the group into its own separate group, that's just segregation, isn't it?
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
クリームを牛乳から分離させる方法をググってみるよ。
I’m going to google how to separate cream from milk.