Focus Flow & level Gas addition module for continuous flow reactors TVA steam flowmeter
A gas addition module has been introduced for the Uniqsis FlowSyn and other continuous flow reactors. Enabling fast, con- trollable pre-saturation of liquid reagents with a wide range of gases, it promotes efficient gas- dependent reactions in flow such as hydrogenation, ozonolysis, carbonylation and direct synthe- sis of carboxylic acids.
The pressurised tube-in-tube design of the gas addition module ensures continuous interaction between the gas and
liquid at every point along its length. The tube-in-tube design is based on semi-permeable membrane technology whereby the semi-permeable inner tube containing the liquid (typically a solvent) is bathed by a stream of pressurised gas which is enclosed within a thick-walled impermeable outer tube. The pressurised gas is able to cross the semi-permeable mem- brane of the inner tube and dissolve into the liquid carried within. However, because of the semi-permeable nature of the inner tube material, the liquid is unable to cross in the oppo- site direction. The module is compati- ble with a wide range of reactive gases (eg CO, CO2, H2, D2, ethene, ethyne, SO2) and organic solvents (eg THF, MeCN, MeOH, PrOH). Capable of generating a contin-
uous gas-saturated solvent stream in typically less than 10 seconds, the module enables flow chemists to carry out a wide variety of applications with minimum effort including het- erogeneous and homogeneous gas-liquid reactions such as hydrogenation, ozonolysis, car- bonylation and direct synthesis of carboxylic acids.
A particularly convenient fea- ture of the gas addition module is the availability of an optional portable gas reservoir.
This space-saving device is easy and safe to charge with gas from a larger reservoir and obvi- ates the need to bring bulky pressurised gas cylinders into the immediate experimental area. The gas addition module can be added in-line to any FlowSyn system and other continuous flow reactors to provide a solvent feed stream pre-saturated with gas, although it can also be used as a reactor in its own right. Uniqsis T: 0845 864 7747
www.uniqsis.com
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Energy savings from targeting and monitoring initiatives require accurate measurement across the minimum and maximum steam flowrate.
Using an innovative cone design to accurately measure steam at variable flowrates, Spirax Sarco’s targeted variable area (TVA) steam flowmeter can also be installed in most confined spaces as it doesn't require long lengths of uninterrupted pipe to ensure accu- racy. Soon to be released in the UK, Spirax Sarco's super insulated vacuum steam line (SIVSL) presents an innova- tive approach to pipe insulation using vacuum technology to give the lowest operating cost of any insulation system. Spirax Sarco T: 01242 521361
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www.spiraxsarco.com/uk
Harsh environments
New Status temperature transmitter gives user flexibility
S Thermocouple
tatus Instruments has launched a new ‘smart’ temperature transmitter range that accepts resistance signals including RTD, Slidewire sensors, and converts them to a standard industrial (4 to
or
20) mA transmission over a user programmed range. With its flexible design, the TTR200 will accept more than 30 resistance
sensors, including Pt100, Pt500, Pt1000, Ni types, Cu types and slidewire sensors up to 100K and resistance up to 10 Kohms. The TTC200 accepts 13 different thermocouples. In addition, Status has also provided the facility to download additional sensor characteristics as well as the user’s own 22 point linearisation table via the free programming software. Zero offset adjustment and zero / span alignment to process is available to help minimise system errors. Input signal damping is also available to help slow the output (if required) for a very rapid rate of change of input signal.
PC configuration, which is performed quickly using Status’ USB port- driven configurator, allows the user to select sensor type, range, filter, Tag number, units and error signal without the need for calibration equipment. Configuration set up may be saved as a PC file for later use. In addition the user may read live process data when connected to the PC allowing for sensor off-set calibration, where the user can offset the value to correct for any sensor offset. If required the desired range can also be specified at the time of order, removing the need for user configuration.
Status Tel: 01684 296818 Web:
www.status.co.uk Process & Control AUGUST 2011 Enter 823
New ATEX-certified electrical boxes
Find out more at
www.marechal.com - Tel 0844 804 2066 Enter 18 23
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