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US 4,165,269 AGranted
Method of making halogenated acetylenes
AssigneeWestinghouse Electric Corp.
InventorPeter M. Castle
Life of this patent
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Abstract
Halogenated acetylenic compounds are prepared by irradiating a mixture of a reactant and a sensitizer with coherent light. The reactant has the general formula R--C.sub.2 HX.sub.4, R--C.sub.2 H.sub.2 X.sub.3, or R--C.sub.2 HX.sub.2 where X is Cl, Br, or I, and R is H or another non-interfering group. The sensitizer has a higher thermal activation energy for its lowest energy dissociation reaction than does any part of said reactant.
Claims10
A method of making halogenated acetylenic compounds comprising:
- (A) forming a mixture of
- (1) a reactant selected from the group consisting of compounds having the general formula R--C.sub.2 H.sub.2 X.sub.3 and R--C.sub.2 HX.sub.2, where each X is independently selected from Cl, Br, and I, and R is H or a group which does not undergo a thermal process at an activation energy which is lower than the activation energy for HX elimination from said reactant;
- (2) a sensitizer which:
- (a) has a higher thermal activation energy for its lowest energy dissociation reaction than does any part of said reactant,
- (b) has a collisonal relaxation time less than 500 microseconds,
- (c) has an absorbing cross section at the wavelength such that complete absorption occurs at about 20 to about 50 torr and 10 cm path length;
- (B) irradiating said mixture with coherent light at said wavelength.
4 more elements
Dependencies are inferred from the claim text.