Apparatus and process for the abatement of semiconductor manufacturing effluents containing fluorine gas
First Claim
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1. A method of abating fluorine from a fluorocompound-containing gas, said method comprising:
- heating the fluorocompound-containing gas to temperature in a range of from about 120°
F. and about 300°
F.; and
introducing a catalyst and a fluorocompound abatement medium into the fluorocompound-containing gas to abate fluorine from the fluorocompound-containing gas, wherein the fluorocompound abatement medium comprises at least one medium selected from the group consisting of superheated steam, methane and hydrogen, with the provisos that when the fluorocompound abatement medium comprises superheated steam, the concentration of fluorine in the fluorocompound-containing gas is in a range of from about 1.1 vol. % to about 3.1 vol. %, based on the total volume of the fluorocompound-containing gas, and when the fluorocompound abatement medium comprises methane or hydrogen, fluorine is abated from the fluorocompound-containing gas under non-combustion conditions.
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Abstract
Apparatus and process for the abatement of fluorine and fluorine-containing compounds from gases containing same, such as effluent gas streams from semiconductor manufacturing operations, wherein a fluorocompound abatement medium is injected into the fluorocompound-containing gas. The fluorocompound abatement medium comprises at least one of steam, methane and hydrogen, with the proviso that when the fluorocompound abatement medium contains methane and/or hydrogen, the injection of the fluorocompound abatement medium is conducted under non-combustion conditions.
21 Citations
20 Claims
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1. A method of abating fluorine from a fluorocompound-containing gas, said method comprising:
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heating the fluorocompound-containing gas to temperature in a range of from about 120°
F. and about 300°
F.; and
introducing a catalyst and a fluorocompound abatement medium into the fluorocompound-containing gas to abate fluorine from the fluorocompound-containing gas, wherein the fluorocompound abatement medium comprises at least one medium selected from the group consisting of superheated steam, methane and hydrogen, with the provisos that when the fluorocompound abatement medium comprises superheated steam, the concentration of fluorine in the fluorocompound-containing gas is in a range of from about 1.1 vol. % to about 3.1 vol. %, based on the total volume of the fluorocompound-containing gas, and when the fluorocompound abatement medium comprises methane or hydrogen, fluorine is abated from the fluorocompound-containing gas under non-combustion conditions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of abating fluorine from a fluorocompound-containing gas, said method comprising:
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heating the fluorocompound-containing gas to temperature in a range of from about 120°
F. and about 300°
F.; and
injecting a fluorocompound abatement medium including at least one hydrocarbon gas into the fluorocompound-containing gas, wherein fluorine is abated from the fluorocompound-containing gas under non-combustion conditions.
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20. A method of abating fluorine from a fluorocompound-containing gas, said method comprising;
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heating the fluorocompound-containing gas to temperature in a range of from about 120°
F. and about 300°
F.; and
introducing a fluorocompound abatement medium comprising steam and at least one of methane and hydrogen, and optionally a catalyst, into the fluorocompound-containing gas, wherein the fluorine is abated from the fluorocompound-containing gas under non-combustion conditions.
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Specification