US4141697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline treated molecular sieves to increase collection efficiency of electrostatic precipitator
Assignee: ChampionX LLC
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Filing: 1978-01-09
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Granted: 1979-02-27
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Expires: 1998-01-09
Abstract
Abstract A method for the electrostatic precipitation of dust particles entrained in a gas stream which comprises adding predetermined amounts of a molecular sieve into the particle-laden gas stream in a location preceding the precipitation apparatus where the gas is at an elevated temperature.
Inventors
- 👤 Vincent M. Albanese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:25
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/01; B03C3/013
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
123 words
A method of improving the conductivity of particles entrained in a stream of particle-laden gas formed by the burning of coal, which particles are collected by an electrostatic precipitator which comprises treating said gas containing the particles prior to contact with the electrostatic precipitator at a temperature not greater than about 1800° F. with a amount of a molecular sieve sufficient to decrease resistivity to 10 +8 -10 +10 ohm-cm. having the formula: M.sub.2/w O:Al.sub.2 O.sub.3 :wSiO.sub.2 :YH.sub.2 O wherein M represents at least one cation which balances the electrovalence of the tetrahedra, n represents the valence of the cation, w the moles of SiO 2 and Y the moles of H 2 O and then passing the gas to the electrostatic precipitator.
Claim 2
Independent Claim
123 words
A method of improving the conductivity of particles entrained in a stream of particle-laden gas formed by the burning of coal, which particles are collected by an electrostatic precipitator which comprises treating said gas containing the particles prior to contact with the electrostatic precipitator at a temperature not greater than about 1800° F. with a amount of a molecular sieve sufficient to decrease resistivity to 10 +8 -10 +10 ohm-cm. having the formula: M.sub.2/w O:Al.sub.2 O.sub.3 :wSiO.sub.2 :YH.sub.2 O wherein M represents at least one cation which balances the electrovalence of the tetrahedra, n represents the valence of the cation, w the moles of SiO 2 and Y the moles of H 2 O and then passing the gas to the electrostatic precipitator.
Claim 3
Dependent Claim
12 words
The method of claim 1 where the molecular sieve is Sieve X.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |