US 2013/0158332 A1 · Simulated Moving Bed Systems for Separation of Para-xylene and Processes for Determining Pump-Around Profiles of the Simulated Moving Bed Systems

Abstract

Embodiments of simulated moving bed systems for separating a preferentially adsorbed component from a feed stream and processes for determining a pump-around profile of the simulated moving bed systems are provided. The process comprises the steps of rotating a rotary valve to a first valve position to direct the feed stream to a first adsorbent sub-bed. An intermediate stream between two adsorbent sub-beds in direct fluid communication with each other is irradiated with laser light that is directed from a probe of a Raman system positioned for inline sampling of the intermediate stream. Scattered light from the irradiated intermediate stream is collected with the probe. A spectrum of the scattered light is generated with the Raman system to determine concentrations of the preferentially adsorbed component and one or more other components in the intermediate stream.

Claims24

Dependent claims

A process for determining a pump-around profile of a simulated moving bed system having a plurality of adsorbent sub-beds in fluid communication with each other and with a rotary valve for separating one or more preferentially adsorbed components from a feed stream comprising the preferentially adsorbed component and one or more other non-preferentially adsorbed components, the process comprising the steps of:

rotating the rotary valve to a first valve position to direct the feed stream to a first adsorbent sub-bed of the plurality of adsorbent sub-beds;
irradiating an intermediate stream between two of the adsorbent sub-beds in direct fluid communication with each other with laser light that is directed from a probe of a Raman system positioned for inline sampling of the intermediate stream;
collecting scattered light from the irradiated intermediate stream with the probe;
and
generating a spectrum of the scattered light with the Raman system to assess concentrations of the preferentially adsorbed component and one or more other components in the intermediate stream.

2 more elements

A simulated moving bed system for separating preferentially adsorbed component from a feed stream comprising the preferentially adsorbed component and one or more other non-preferentially adsorbed components, the system comprising:

a plurality of adsorbent sub-beds in fluid communication with each other and comprising two adsorbent sub-beds in direct fluid communication with each other via an intermediate stream;
a rotary valve in fluid communication with each of the plurality of adsorbent sub-beds and configured to rotate to a plurality of valve positions that each direct the feed stream to a different one of the plurality of adsorbent sub-beds;
and
a Raman system comprising:
a probe positioned for inline sampling of the intermediate stream and configured to irradiate the intermediate stream with laser light and to collect scattered light from the irradiated intermediate stream;
and
a Raman spectrophotometer cooperatively configured with the probe to generate a spectrum of the scattered light to determine concentrations of the preferentially adsorbed component and one or more other components in the intermediate stream produced during the rotary valve being in at least one of the valve positions.

4 more elements

Dependencies are inferred from the claim text.

Simulated Moving Bed Systems for Separation of Para-xylene and Processes for Determining Pump-Around Profiles of the Simulated Moving Bed Systems

Life of this patent

Simulated Moving Bed Systems for Separation of Para-xylene and Processes for Determining Pump-Around Profiles of the Simulated Moving Bed Systems

Life of this patent

Abstract

Claims24