METHOD FOR PROCESSING OF BENZENE FRACTIONS Russian patent published in 2010 - IPC C10G7/02 

FIELD: technological processes.

SUBSTANCE: invention is related to chemical and petrochemical industries, namely, to methods for stabilisation of secondary benzene fractions. Invention is related to method of benzene fractions processing, including supply of unstable benzene fractions into benzene stabilisation tower, their separation into fractions: stabilisation head and stabilisation residue, stabilisation head is supplied to gas-fractionating installation with production of gas components. Saturated absorbent from lower part of absorption tower is supplied to unit of benzene stabilisation, where benzene fractions are also supplied, at the same time hydrocarbon gases from unit of benzene fractions and saturated absorbent stabilisation are exhausted into absorption tower, prior to supply of benzene to stabilisation tower, benzene fractions in mixture with saturated absorbent are heated due to heat transfer from stabilisation residue drained from stabilisation tower as commercial-grade benzene, some stabilisation residue is sent to absorption tower for absorption of propane-butane fraction from hydrocarbon gases of lower pressure with further supply of saturated absorbent into benzene stabilisation tower, and another part of stabilisation residue is drained as commercial-grade benzene.

EFFECT: provision of required extent of benzene stabilisation, reduced energy consumption, reduced losses of benzene fractions and liquefied gas.

2 ex, 1 dwg