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公开(公告)号：US11242302B2
公开(公告)日：2022-02-08
申请号：US17256290
申请日：2019-06-21
Applicant: AXENS
Inventor： Isabelle Prevost , Jerome Pigourier , Gerard Hotier
Abstract: The present invention describes a process for obtaining para-xylene from a feedstock containing xylenes, ethylbenzene and C9+ hydrocarbons, said process comprising a single stage A of separation in a simulated moving bed carried out with a zeolite as adsorbent and a desorbent and making it possible to obtain at least three fractions, a fraction A1 comprising a mixture of para-xylene and of desorbent and two fractions A21, A22 comprising ethylbenzene (EB), ortho-xylene (OX) and meta-xylene (MX) and desorbent, said stage is carried out at a temperature between 20° C. and 250° C., under a pressure between the bubble pressure of the xylenes at the operating temperature and 2.0 MPa, and with a ratio by volume of the desorbent to the feedstock in the unit for separation 2 in a simulated moving bed is between 0.4 and 2.5, a stage B of fractionation by distillation in a 2-cut distillation column of the fractions A21 and A22 resulting from stage A, in which said fractions are introduced separately at distinct injection points, and makes it possible to obtain a fraction B2 containing ethylbenzene, ortho-xylene and meta-xylene, and a fraction B42 devoid of aromatic compounds having 8 carbon atoms and containing desorbent.
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2.发明授权Analysis device and associated method for operating simulated moving bed xylenes separation units a Raman spectrometer 有权用于操作模拟移动床二甲苯分离装置的拉曼光谱仪的分析装置和相关方法公开(公告)号：US09297792B2
公开(公告)日：2016-03-29
申请号：US14302526
申请日：2014-06-12
Applicant: AXENS
Inventor： Gerard Hotier
CPC classification number: G01N33/241 , B01D15/1842 , C07C7/12 , G01K7/02 , G01N21/65 , G01N2021/8416 , C07C15/08
Abstract: The present invention describes an analysis device and a method associated with this device, said device comprising an analysis cell (8) containing an optrode (10), receiving an input laser signal and sending an output signal to the Raman spectrometer, and said method using two analysis routes: an analysis route 1 connected to the internal circulation current passing from adsorber B to adsorber A, and an analysis route 2 connected to the distilled raffinate originating from distillation column C.
Abstract translation: 本发明描述了一种与该装置相关联的分析装置和方法，所述装置包括分析单元（8），该分析单元（8）包含光栅（10），接收输入激光信号并向拉曼光谱仪发送输出信号，所述方法使用 两条分析路线：连接到从吸附塔B流向吸附塔A的内部循环电流的分析路线1以及与蒸馏塔C相连的蒸馏提余液连接的分析路线2。
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