FIELD: organic chemistry, petroleum chemistry, chemical technology.
SUBSTANCE: the parent mixture consisting of preferably from C4-hydrocarbons comprising n-butenes, impurities of isobutene and/or butadienes and, possibly, butanes is subjected for a single or two-fold rectification with preliminary and/or simultaneous, and/or intermediate isomerization of 1-butene to 2-butenes preferably. From the distillate composition hydrocarbons with normal boiling points below -4°C and, possibly, n-butane in a remained flow containing 2-butenes preferably and, possibly, other part of n-butane are removed, and isomerization of 2-butanes to 1-butene is carried out, and 1-butene is isolated as a distillate, possibly, with impurity of n-butane. Invention provides simplifying technology of the process.
EFFECT: improved preparing method.
13 cl, 3 dwg, 2 tbl, 9 ex
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