| http://www.w3.org/ns/prov#value | - The process of claim 3, wherein the hydrocarbons are hydrocarbons which do not include olefins represented by the following formula and/or dienes ##STR2## wherein R1 and R2 each is a C1 -C6 alkyl group, and R3 and R4 each is a C1 -C6 alkyl group or a hydrogen atom.
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