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Process and device for simulated moving bed seperation with a reduced number of valves

A technology for simulating moving beds and equipment, applied in the field of separation of natural or chemical products, and can solve problems such as special structure, large size, and complexity

Inactive Publication Date: 2008-03-19
INST FR DU PETROLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The second technology only uses a single valve, but this single valve is a multi-way valve, but it must have a special structure, large size, and extremely complicated

Method used

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  • Process and device for simulated moving bed seperation with a reduced number of valves
  • Process and device for simulated moving bed seperation with a reduced number of valves
  • Process and device for simulated moving bed seperation with a reduced number of valves

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Embodiment Construction

[0039] The invention will be better understood from the following description in conjunction with Fig. 1 (prior art), Fig. 2 and Fig. 3 (apparatus of the invention).

[0040] In order to achieve one of the above-mentioned objects, the present invention therefore proposes a device capable of separating at least one desired compound from a mixture containing such compound by adsorption in a simulated moving bed, comprising:

[0041] At least one column divided into a plurality of adsorbent beds Ai separated by distributor / extractor plates Pi to continuously supply and extract at least two feed fluids: feed F and desorbent D, and at least two withdrawal fluids : raffinate R and extract E, Pi placed between bed Ai and next bed Ai+1,

[0042] The equipment also includes at least one feed net F-net, desorbent net D-net, raffinate net R-net and extraction liquid net E-net, wherein each net is connected to the column by a plurality of intermediate pipelines, the The intermediate pipe...

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Abstract

The present invention relates to a simulated moving bed (SMB) separation plant comprising a column, adsorbent beds Ai separated by plates Pi, with a single distribution of fluids, in particular feed F, desorbent D, raffinate R and extract E With extraction nets, and multiple two-way valves for the fluid distribution, the number of these valves is limited compared to the prior art. According to the invention, the column is divided into a number of sections Sk with 2 or 3 superimposed plates, each section Sk comprising an external bypass line Lk connected to each plate of Sk through a connecting pipe comprising a plate valve Vi. Each line Lk includes control means to limit the flow therein, and is connected to each fluid network F, D, R, E by a single line including a single controllable two-way isolation valve for sequentially separating The respective fluid F, D, R or E is supplied to or withdrawn from the considered segment Sk. The invention also relates to a separation process using such a device, or the use of such a device for the separation of para-xylene or meta-xylene from aromatic C8 fractions.

Description

technical field [0001] The invention relates to the technical field of separation of natural or chemical products which are difficult to separate by distillation. At present, a class of methods and related equipment are used, which are known as "chromatographic" or "simulated moving bed mode" or "simulated countercurrent mode" or "simulated co-current mode" separation methods and equipment, which are hereinafter referred to as "SMB". [0002] The areas covered are non-exclusively: [0003] Separation of n-alkanes and branched alkanes, naphthenes and aromatic compounds; [0004] Separation of alkenes / alkanes; [0005] Separation of p-xylene from other isomers in C8 aromatic compounds; [0006] Separation of m-xylene and other isomers in C8 aromatic compounds; [0007] • Separation of ethylbenzene from other isomers in C8 aromatics. [0008] Apart from refineries and petrochemical complexes, many other applications are possible, among which glucose / fructose separation, sep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D15/18
CPCB01D53/0423B01D15/1842B01D2256/24B01D2257/7027G01N30/02G01N30/6069B01D53/0446B01D2259/4148G01N30/44C07C7/12C07C15/08B01D15/1821B01D15/02
Inventor G·霍蒂尔P·勒夫莱弗S·劳雷特F·奥吉尔
Owner INST FR DU PETROLE
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