Phase Equilibria Apparatus - SITEC-Sieber Engineering AG equilibria... · Phase equilibria...

Phase equilibria unit_e_V8 / Version 06.06.2016 / Beat Zehnder (SITEC-Sieber Engineering AG) / of 11

Phase Equilibria Apparatus

Phase Equilibria Apparatus (500 bar, 120 °C, capacity 35-50 ml depending on pressure balance piston position, colour camera with endoscope, high-pressure gear pump for external recirculation of heavy and light phase (option), motor-driven syringe pump for pressure generation and control (option).


Phase equilibria apparatus (technical description) This phase equilibria unit is built for the measurement and detection of phase equilibria and phase transitions by optical means. The picture from the optical cell is transmitted through the sapphire windows to the directly connected camera system. It is displayed on the monitor in the front panel. The mixture of solute and solvent gas is agitated by the magnetic stirrer. Whenever samples are drawn from the top or the bottom connection of the cell, the directly connected counterbalance piston moves towards the centre of the cell, thus keeping the pressure in the measuring cell constant even during the sampling operation. No need to add additional solvent gas, which would change mass ratio and temperature and consequently result in a disturbed equilibria. This special design of an optical cell has been patented. Besides the monitor, the following instruments are assembled in the front panel:

Digital display of the pressure in the optical cell

Temperature controller and digital display of the temperature in the optical cell

Solvent gas bottle pressure

Gauge for the solvent gas feed pressure

Counterbalance pressure

Counterbalance high pressure alarm In addition the following operation instruments are assembled in the front panel:

Main switch

On/off-switch for the magnetic stirrer

Magnetic stirrer speed adjustment

On/off-switch for the light beam

Adjustment of the light intensity

On/off-switch for the heating system

Top and bottom sampling valves

Pressure reducing valve for the fine adjustment of the counterbalance pressure The solvent gas pressure is generated by a hand operated pressure generator which allows a very fine adjustment of the required cell pressure. For the very last adjustment the counterbalance-piston may be used for the final approach. The cell pressure is measured by a pressure transducer which is directly mounted to the cell. The temperature in the optical cell is measured by a thermocouple and controlled by a temperature controller which acts on a superimposed heating system.


The optical cell with camera, the magnetic stirrer and the pressure generator are assembled on the bench; the light generator, the piping and wiring in the unit. The two sampling valves may be connected directly to an SFC or by sampling vessels used for GC analytic. Phase equilibria cell with pressure balanced piston, 500 bar, 200°C, capacity 36 – 50 ml (depending on piston position), magnetic stirrer and option “measurement of piston position”. Phase equilibria cell with

option “piston position measurement”.

High-pressure gear pump, 700 bar, 200°C for the pulsation free recirculation of upper and lower phase, suitable for fluids with low viscosity such as liquid or supercritical gases (used for option “external recirculation”).


Questionnaire for phase equilibria units Operating pressure max.: 500 bar 700 bar 1000 bar ........................................................................................................... Operating temperature max.: 120 °C 150 °C 200 °C 450 °C ........................................................................................................... Supercritical solvent: carbon dioxide (CO2) ....................................................... Equilibria cell capacities: 25 ml with pressure balanced piston 50 ml with pressure balanced piston .......................................................................................................... Options: Position indication for pressure balanced piston Pulsation-free recirculation of upper or lower phase (gear pump) Data acquisition system by PC Motor-driven piston pump for pressure generation (instead of hand pump) ...........................................................................................................................................................


Contact Details Last name: ............................................................................................................................... First name: ............................................................................................................................... Title/gender: ............................................................................................................................... Company: ............................................................................................................................... Department: ............................................................................................................................... Street: ............................................................................................................................... P.O. Box: ............................................................................................................................... Zip code: ............................................................................................................................... Town / city: ............................................................................................................................... Country: ............................................................................................................................... Phone: ............................................................................................................................... Fax: ............................................................................................................................... E-mail: ............................................................................................................................... www. ............................................................................................................................... Please fill in this form and return it to SITEC-Sieber Engineering AG.


Data acquisition and online visualisation As a useful addition to the SITEC high-pressure pilot units, we are able to offer you a simple and also a very flexible data acquisition program. This program allows to visualise your process data online during the experiments and to save it on your hard disk for a later interpretation. The data acquisition and visualisation program will be completely integrated in your high pressure pilot unit and is configured for a specific application. It is also possible to upgrade an existing high pressure pilot unit, but with a bigger expenditure. Based on the SCADA Software SpecView from EUROTHERM (see overview hereafter) SITEC provides several windows specifically programmed for a certain application. One window shows all the controller symbols and allows set-point adjustment or also alteration of control parameters. In addition, all monitoring signals are shown. On an additional screens all the data are graphically and digitally displayed. All the data are automatically stored always the data acquisition program is started. On request a certain section (time interval) can be extracted and exported to Microsoft Excel. The full development package of SpecView which is also supplied allows to change an existing or to create a new user interface using easy to handle “drag and drop” methods. On request, we will gladly send you a more detailed description of this development package. The communication PC <-> Pilot Unit is made via USB. The controllers are interconnected by a RS485 interface. The system requirements for the installation of SpecView: Windows PC with Windows 95, 98, Me, NT, 2000, XP or 2003 Server operating system, 64MB RAM minimum (128MB recommended), USB interface.

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Phase equilibria unit_e_V8 / Version 06.06.2016 / Beat Zehnder (SITEC-Sieber Engineering AG) / Page 8 of 11

Process control with integrated batch documentation This control allows you to master your processes by combing display, regulation, control and even batch documentation – all in one. Advantages:

complete batch documentation trend display of process flow dynamic overview of the installation easy input of nominal values exportable into standard formats protocols and diagrams accessible over network

The user-friendliness of the system operation is achieved by clearly arranged displays. This control system includes functions which otherwise are integrated in process control systems only.

The control system allows manual and – as an option – automatic control of the installation. All process parameters can be displayed.

The data of the current batch as well as the system overview is displayed on the main window. The operator can control the process over the display picture.


The automatic control circuits have special display windows with integrated diagrams and nominal value input.

Important process parameters are shown in a trend display. The trend display has a zoom and FixScale function and can be printed or exported into bmp, wmf, or jpg graphic formats.

With the help of the integrated logging program the process can be documented completely. All protocols are exportable in pdf, html, or txt formats. data protocol error protocol event protocol comment protocol

The batches recorded can be retrieved from the archive. All protocols and diagrams can be exported and re-printed as desired.


Reference list for pilot plants Rhône Poulenc, France Chemical University of Delft, Holland Process engineering University Wageningen, Holland Agricultural research BASF Ludwigshafen, Germany Chemical Salzgitter, Germany Chemical Hüls Chemie, Germany Chemical ENI, Italy Petrochemical Givaudan, Switzerland Flavours and fragrances Research Centre Karlsruhe Environmental Reemtsma, Hamburg, Germany Tobacco CNRS, France Food research TUBITAK, Turkey Food research SASOL, South Africa Waxes DEGUSSA-SKW, Trostberg, Germany Hops, spices Guinness, Ireland Brewery research English Hop Products, Great Britain Hops Fraunhofer Institute Pfinzthal, Germany Process engineering University of Bremerhaven, Germany Food research Novartis, Switzerland Chemical Firmenich, Switzerland Flavours and fragrances Haarmann & Reimer, Germany Flavours and fragrances University of Messina, Italy Chemical engineering MERCK, Germany Chemical University of Bari, Italy Research LIPI, Indonesia Natural products F.Hoffmann-La Roche, Switzerland Reactions University of Tübingen, Germany Pharmaceutical research National Technical University of Athens, Greece Research Inst. for “Nichtklassische Chemie”, Leipzig, Germany Research University of Halle-Wittenberg, Germany Research Janssen Pharmaceutica, Beerse, Belgium Drug delivery research MAINELAB, Angers, France Drug delivery research Semnan University, Semnan, Iran Research JSC “Interbridge”, Moscow, Russia Research Ecole des Mines d’Albi, Albi, France Research KRAFT Foods, UK Coffee Hochschule Niederrhein, Germany Research Solvay Solexis, Italy Research (polymers) EPFL, Switzerland Research University of Alicante, Spain Research King Fahd University of Petroleum, Saudi Arabia Research Inst. Nawozow Sztucznych Pulawy, Poland Research TU Bergakademie Freiberg, Germany Research 3M, Seefeld, Germany Research FAPEX, Salvador de Bahia, Brazil Research University of Copenhagen, Frederiksberg, Denmark Research University Duisburg-Essen, Essen, Germany Research C. Illies, Hamburg, Germany (for China) Research AiFame GmbH, Wald-Schönengrund, Switzerland Natural products


Additional units in following countries: Denmark Germany South Africa Turkey Holland France Belgium Switzerland Great Britain Italy India Ireland Canada Bulgaria Indonesia Greece Iran Russia Spain Saudi Arabia Poland Brazil China Activities: Flavours and Fragrances Food Industry Biotechnology Pharmaceutical Industry Chemical Industry Oil/Gas Industry Coal Industry

Phase Equilibria Apparatus - SITEC-Sieber Engineering AG equilibria... · Phase equilibria...

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