Is There Any Feasible Procedure For The Synthesis Of Oleum For Laboratory Purpose?

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Frank T. Edelmann

Dear Daniyal Ahmed just in case that this question is still of interest to you: The article cited below contains a detailed description of how to make oleum in the laboratory:

Preparation of Sulfur Trioxide and Oleum

http://www.sciencemadness.org/member_publications/SO3_and_oleum.pdf

Personally I would suggest to buy oleum from commercial sources as it is an industrial product manufactured on a large scale.