53562-2562
Web: www.scilog.com Tel: 800-955-1993 Fax: 608-824-0509

Polymer / Organic Synthesis:
Automated Mass-Flow Control of Reactants

SUMMARY:

The ChemTec
TM
interfaces directly with your electronic balance to provide precise, automated mass-flow
control of reactants, catalysts, and additives. Programmable feed rates allow precise control of reaction
stoichiometry thereby improving yield and molecular weight distribution of your product. The ChemTec is
ideally suited for R&D, and scale-up applications.

Balance
ChemTec
Reaction Vessel

FEATURES:

The SciLog ChemTec smart pump provides programmable reaction feed either by volume or by weight. By
simply connecting to an electronic, top-loading balance, the ChemTec offers precise mass-flow metering as
low as 0.01 gm/min (8 RPM motor). Inert, high precision piston pumps (wetted parts of ceramic or 316 SS)
can readily accommodate even corrosive reagents. For higher mass-flow ranges, peristaltic pumps as well as
pulse-free magnetic gear pumps (wetted parts of 316SS & Teflon® or Ryton®) are available pump options.

Easy to use software allows the ChemTec pump to be scheduled for unattended operation during weekends
and off-hours. User programmable alarms can be used to monitor mass-flow rate, cumulative reactant
weight, as well as end of program status. During an alarm, the ChemTec stops the pump action and/or
provides an auditory alarm. All pump data and alarms can be printed out or sent to a personal
computer for data archiving, and with SciLogs SciDoc Documentation Package, collected
automatically into a custom Excel
©
Spreadsheet.

In addition, the ChemTec provides time-programmable mass-flow rates. The pump rate can be changed
on a user-defined schedule to automatically increase, decrease, or to remain constant with time. This
feature of the ChemTec allows you to generate the optimal reactant vs. time concentration profile that will
meet the specific requirements of your synthesis.


ADVANTAGES:
Optimal control of reaction stoichiometry / conditions. Improved molecular weight distribution and product yield. Optimal reactant versus time concentration profile. Scheduling of reactant addition during off-hours. Automated mass-flow control at a modest price. Depending upon model, flows from 0.01 to 3700 gr/min
OVER

Scilog Inc, 8845 S. Greenview Drive #4, Middleton, WI 53562-2562
Web: www.scilog.com Tel: 800-955-1993 Fax: 608-824-0509

SAMPLE PROGRAM:

A typical ChemTec user-program for controlling pump functions is shown below. All program statements are
easily entered from the ChemTec front panel. Alternatively, lengthy and more complex user-programs can be
prepared and stored in Note Pad on your PC and uploaded to the ChemTec from the Hyperterminal (Start:
Accessories: Communication: Hyperterminal) of your PC. The following exponential feed program is entered
into EDIT of the Mass Flow mode:

000
START

Start of Program
001
CW


Pump direction: Clockwise
002
RUN

Pump motor is turned On.
003
RATE=0.37g/m
Starting pump rate = 0.37g/m
004
INTP=0.50g/m
Pump ramps from 0.37 to 0.5 0g/m,
005
TIME=12:00
over a 12 hr time interval
006
INTP=0.69g/m
Pump ramps from 0.50 to 0.69 g/m
007
TIME=12:00
over the second 12 hr time interval
008
INTP=0.94g/m
Pump ramps from 0.69 to 0.94 g/m
009
TIME=12:00
over the third 12 hr time interval
010
STOP

Pump motor stops
011
COUNT=1

Pump program cycles
012
END

End of Program

Note: Use the * (Star) key of the ChemTec to access the INTP (Interpolation) function
When executing the above program, the ChemTec will have a starting pump rate of 0.37 g/min and
ramps up to 0.50 g/min during the first 12-hour interval. During the second 12-hour interval, the
pump rate is ramped from 0.50 to 0.69 g/min. In the third, 12-hour interval, the pump rate is ramped
from 0.69 to 0.94 g/min.
For demonstration purposes change TIME = 12:00 (twelve hours) to TIME = 00:01 (one minute)


ORDERING INFORMATION:
SciLog Customer Service: 1-800-955-1993

CATALOG #
DESCRIPTION:

100-431MASS-8
ChemTec FM-8 with Piston Pump Head; 8RPM motor; 100 psi max.; pump
rate from 0.01 gm/min to 0.4gm/min

100-431MASS
ChemTec FM-420 with Piston Pump Head; 450RPM motor; 100 psi max.;
0.1 gm/min to 20 gm/min.

100-532MASS
ChemTec FM-520 with Piston Pump Head: 100 psi max., 10 gm/min to 340
gm/min.

080-095A
Printer, interfaces with ChemTec documents your process.

080-099CHEM
SciDoc for ChemTec, Documentation Software for ChemTec Data with
customized Excel
©
Spreadsheet.

080-405
Small Bore Tubing Kit with 25 feet of 1/8 OD x 1/16 ID Teflon tubing
including two pairs of ferrules and nuts (1/4-28).










Other Pump Head / Balance combinations are available, Contact SciLog with your needs.







AN 2002, Copyrighted. Last Updated: 12/23/05 Last Reviewed: 12/23/05