English to Russian Tech/Engineering Chemistry; Chem Sci/Eng

The ОС reactor effluent comprises methane, light olefins and hydrocarbons having 4 carbon atoms or more. Advantageously said ОС reactor effluent is sent to a fractionator and the light olefins are recovered. Advantageously at least a part of the hydrocarbons having 4 carbon atoms or more are recycled at the inlet of the ОС reactor, optionally mixed with the heavy hydrocarbon recovered from the effluent of the XTO reactor. Advantageously, before recycling said hydrocarbons having 4 carbon atoms or more at the inlet of the ОС reactor, said hydrocarbons having 4 carbon atoms or more are sent to a second fractionator to purge the heavies. In a preferred embodiment the light olefins recovered from the effluent of the XTO reactor and the light olefins recovered from the fractionator following the ОС reactor are treated in a common recovery section.
In another embodiment the ОС reactor effluent and the XTO reactor effluent are mixed and sent to a fractionator, or sent to the same fractionator, and the light olefins are recovered. At least a portion of the hydrocarbons having 4 carbon atoms or more are recycled at the inlet of the ОС reactor. Advantageously, before recycling said hydrocarbons having 4 carbon atoms or more at the inlet of the ОС reactor, said hydrocarbons having 4 carbon atoms or more are sent to a second fractionator to purge the heavies. The recovered light olefins are treated in a recovery section which is also called a common recovery section as in the above paragraph.

сразу вроде бы хочется назвать ее "общая секция выделения", но только из прочтения абзаца становится видно, что в секцию попадают 2 потока уже выделенных легких олефинов. Есть ли какое-нибудь устоявшееся название?