There are many methods for the production of butenes. Mainly they are Extracted from C4 hydrocarbons, from dehydrogenation of n-butane, from ethanol and from butenes.
Butadiene is a simple conjugated diene with the formula C4H6. It is an important industrial chemical used as a monomer in the production of synthetic rubber. The molecule can be viewed as two vinyl groups (CH2=CH2) joined together. The word butadiene usually refers to 1,3-butadiene, which has the structure H2C=CH−CH=CH2.