1) Separate 2) To obtain by such a process 
• (v. t.) To separate into different portions or fractions, as in the distillation of liquids.
Frac'tion·ate transitive verb To separate into different portions or fractions, as in the distillation of liquids. 
[v] - separate into constituents or fractions containing concentrated constituents 2. [v] - obtain by a fractional process
verb obtain by a fractional process
to separate or divide into component parts, fragments, divisions, etc. · to separate (a mixture) into ingredients or into portions having different properties, as by distillation or crystallization; cause to undergo fractional distillation, crystallization, or the like. · to obtain by such a process.