PROCESS AND EQUIPMENT FOR SEPARATING 1,2,4 TRIMETH

专利名称：PROCESS AND EQUIPMENT FOR

SEPARATING 1,2,4 TRIMETHYLBENZENE(PSEUDOCUMENE) FROM A MIXTURECONTAINING AROMATIC HYDROCARBONS

发明人：FAVILLI, Stefano,SCIBOLA, Luciano申请号：EP11820795.0申请日：20111011公开号：EP2555842B1公开日：20151118

摘要：A method and an apparatus (7') for separating 1,2,4-Trimethylbenzene byfractional distillation of a mixture (31) that contains C9 or C9+ aromatic hydrocarbons,and possibly hydrocarbons with less than nine carbon atoms. According to an aspect ofthe invention, a first distillation step and a second distillation step are provided arecarried out in respective distillation chambers (75,75') defined by a cylindrical verticalcontainer 501 and by an inner partition wall (85) of the container. According to anotheraspect of the invention, a means is provided for compressing () at least one part (65) ofa overhead vapour fraction extracted from the first distillation chamber and/or from thesecond distillation chamber, in order to increase the condensation temperature of theoverhead vapour above the boiling temperature of a bottom fraction (38,38') that isextracted from the first second distillation and/or from the second distillation chamber,and a condensation is also provided of the compressed overhead vapour (66) in thereboiler (70') associated to the first chamber and/or to the second chamber, so that thecondensation latent heat provides the evaporation heat for a respective portion (39') of

the bottom fraction. In a particular exemplary embodiment, the compression means ()of the fraction (65) that is extracted from the first chamber is operated by an expansionmeans (7) for expanding an aeriform substance (761), and is used in the reboiler (70')associated with the second chamber (75'), and the apparatus (7') comprises a steam (7)generation means (71) that is associated with an externally heated reboiler (70)associated with the first distillation chamber (75). In another particular exemplaryembodiment, at least one part (52) of the overhead vapour of the first chamber (75),which contains Pseudocumene, is fed to the second distillation chamber (75') through apassageway (86) that is defined within the inner partition wall (86).

申请人：SIME S R L

地址：IT

国籍：IT

代理机构：Celestino, Marco

更多信息请下载全文后查看