Guidelines for care & Use of Dry Solvent Stills [Example]

specialty gases sold by Sunox, a local company, 996-3832. If lecture bottles are purchased
from National Welders, they can be returned when empty to them rather than taken out
with garbage to a landfill. Lecture bottles of unusual gases can be purchase from National
Welders, care of Mr. David Young, phone # 1-800-866-4422, ext. 3602, cell phone # 336-817-
5070. I prefer that you purchase lecture bottles from National Welders.
The following liquid gases are usually purchased by Dr. Marcus Wright for use in the NMR room,
from National welders, unless otherwise noted:
� Liquid Helium 100 liters (for the NMR room, room # 12A)
� Liquid Nitrogen LNS 160, PGS45, or XL50, all High Pressure Stainless Steel “non-magnetic”
tanks for the Mass Spectrometer in the NMR room.
� Liquid Nitrogen LNS 160, PGS45, or XL50, all Low Pressure Stainless Steel “non-magnetic”
tanks for the NMR.
The following liquid Argon gas tank is purchased by Dr. Brad Jones, for use in Lab room # 118,
from National welders, perhaps once every 2 months:
� Liquid Argon LARS50
The following liquid gas is purchased from Magnetic Resources company maybe once a year as a
backup supplier, in case National Welders runs out of current amount needed:
� Liquid Helium size 100, Stainless Steel “non-magnetic”, from Magnetic Resources, phone
800-443-5486, for the NMR room
Lecture bottles bought from Sigma-Aldrich Chemical Co. can be returned to them via ROADWAY
CO. shipment. Sigma-Aldrich has a standard form to attach to the package. Follow the procedure
they will mail you when you call them at 1-800-558-9160.
Matheson lecture bottle gases can also be purchased by calling Matheson directly in Georgia at
770-961-7891. Returning these empty lecture bottles is relatively easy. See the appropriate
section in the chapter entitled “Procedure For Handling Hazardous Chemical Waste”, #7, “Spent
Lecture Bottle Compressed Gas Cylinders”.
Please note that a good local source for copper, stainless steel and aluminum tubing of various
sizes is as follows: Ferguson Enterprises, Inc., 7905 North Point Blvd., Winston-Salem, NC phone
# 759-0253.
In particular, standard size copper tubing (l/8 in. outside diameter, 0.028 in. inside diameter),
standard size stainless steel tubing (again, 1/8 in. O.D. and 0.028 in.I.D.) and aluminum tubing can
be ordered here with prompt delivery. We have an account with them (WFU Acct. # 2350).
Fisher also sells copper tubing and Swagelok fittings. The only other source for Swagelok fittings
is Charlotte Valve and Fitting Co., 704-598-7040, WFU Acct. # WFU001.
Process and Control Equipment company in Charlotte, NC, phone # 704-334-0881, is a good
source for Imperial Eastman polyethylene tubing (Poly-Flow tubing, catalog # 22-P, for 1/8th inch O.D.,
and 44-P, for 1/4th inch O.D., of various colors). This tubing will withstand a maximum working pressure
of 125 psi for 1/8th inch tubing and 100 psi for 1/4th inch tubing.
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