Sciencemadness Discussion Board

replacement for asbestos paper?

Vitus_Verdegast - 26-12-2004 at 09:41



For some reactions it is advantageous to heat the mixture, and the following arrangement is very satisfactory for this purpose. The bottle H is wrapped with moistened asbestos paper to a thickness of about 3 mm. and the paper is then allowed to dry. When the asbestos is thoroughly dry the bottle is wound with a coil of No. 24 Nichrome wire, beginning the coil at the bottom of the bottle and making the turns about 9 mm. apart. The wire is then covered with a 3-mm. layer of asbestos, which is moistened and allowed to dry, after which the wire is wound around the bottle in another coil from top to bottom. The second coil is covered with asbestos as before, and the ends of the wire are connected to the terminal wires from a source of current. These wires are led along the bottle to the neck and held by means of tape in order to avoid excessive shaking. A variable resistance in the circuit is used to regulate the temperature.

Does anyone have any suggestions for a good replacement for asbestos paper in this particular case?

NERV - 26-12-2004 at 10:47

You could probly use some kind of ceramic fiber based paper. Like alumina silica fiber paper, or just plain silica fiber paper. They should work fairly well as a replacment for asbestos paper in that procedure.

neutrino - 26-12-2004 at 13:10

The usual replacement for asbestos is fiberglass. For insulation, use the various cloths used in the composite. For filtration, get glass filter paper, something with a glass frit, or you might be able to get away with fiberglass insulation with the binder removed.

Thermal - 29-12-2004 at 22:05

Perhaps something like engine exhaust header wrap.
Though that might insulate a bit too well.

Maybe just regular ol' fiberglass cloth like neutrino mentioned. It's availible in no end of weaves and such.

[Edited on 30-12-2004 by Thermal]

[Edited on 30-12-2004 by Thermal]