C - Chemistry – Metallurgy – 30 – B
Patent
C - Chemistry, Metallurgy
30
B
122/39, 148/2.4
C30B 19/10 (2006.01) C23C 16/448 (2006.01) C30B 19/04 (2006.01)
Patent
CA 1224120
11 ABSTRACT: It is necessary in many heat treatment processes conducted in open systems to maintain a given partial pressure of a volatile component of a material being treated, and it is desirable to conserve this volatile component, both on account of cost and in the case of components such as mercury, toxicity. A controlled unsaturated vapour pressure of a volatile liquid 28 may be produced in a tube 3 by passing stream of a carrier gas through a vapouriser 4 containing the liquid 28 at a temperature Ts, passing the mixture of the carrier gas and vapour of the liquid 28 through a tube 3 containing material 29 to be treated, which material 29 is at a temperature Tt. the mixture of the carrier gas and vapour of the liquid 28 is then passed to a condenser 6 from which the carrier gas is vented to waste, and the vapour of the liquid 28 is condensed at a tempera- ture Tc in the condenser 6. Tt>Ts>Tc. The condensate passes from the condenser 6 to the vapouriser 4 through a tube 12, and the liquid 28 fills a cross-section of a length of the tube 12.
443361
Brice John C.
Brough Colin R.
N.v.philips'gloeilampenfabrieken
Van Steinburg C.e.
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