US3733778A Expired / Lapsed US ⏱️ 0.0 years remaining

Pollution control method and apparatus

Assignee: AC Corp

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Filing: 1972-05-01

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Granted: 1973-05-22

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Expires: 1992-05-01

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Abstract

Abstract A method of controlling the emission of odors and particulate matter, for example, from a rendering and meat packing plant. The method comprises the steps of providing a source of gas, for example air, containing an undesirable level of odor and particulate matter, causing the gas to pass through a chamber containing a densely sprayed chemical solution which contacts the gas at a high contact efficiency between the gas and the liquid to collect and suspend particulate matter in the solution and absorb odors, and causing the gas again to be placed into forced intimate contact with the solution while simultaneously separating the chemical solution from the cleansed gas. The method may also include the step of creating a uniform gas velocity prior to treatment, and, in an alternate embodiment, the gas may be subjected to a plurality of spraying treatments with the same or different solutions. The solutions may be acidic, basic, masking, oxidizing, neutralizing, or reacting. Specific solutions disclosed include solutions of water with sodium carbonate (soda ash), sodium bisulfite, sodium hydroxide, chlorine dioxide, potassium permanganate, and calcium hypochlorite. Chlorine gas may also be introduced into the air stream for the same purpose. The method may also be practiced using a plurality of sequential treatments using different solutions in each of the plurality of subsequent stages.

Inventors

👤 E Hungate
👤 H Ogletree
👤 G Nickell

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-11-04 04:35

CPC Classifications

B; B01; B01D; B01D47/00; B01D47/06

Claims Analysis

Total Claims: 8

Claim 1

Independent Claim 33 words

The method as set forth in claim 1 wherein said first aqueous solution is a solution of sodium carbonate and water and said second aqueous solution is a solution of chlorine and water.

Claim 2

Dependent Claim 35 words

The method as set forth in claim 2 wherein sodium carbonate is contained in water in the range of about 0.5 to about 1.5 percent by weight and chlorine is injected directly into the water.

Claim 3

Dependent Claim 38 words

The method as set forth in claim 2 wherein the solution of sodium carbonate is at a pH of about 10 to about 12 and the solution of chlorine at a pH of about 1.5 to about 6.5

Claim 4

Dependent Claim 85 words

The method as set forth in claim 2 further including the additional steps of causing substantial quantities of a third sprayed aqueous solution to contact intimately said gas in a third location in said first means located downstream from said second location of said first means and causing substantial quantities of said third solution to contact intimately said gas while simultaneously separating substantially all of said solution in a third location of said eliminator means located downstream from said second location in said eliminator means.

Claim 5

Dependent Claim 30 words

The method as set forth in claim 5 wherein said first solution is sodium carbonate and water, said second solution is water and said third solution is chlorine and water.

Claim 6

Dependent Claim 33 words

The method as set forth in claim 5 wherein said first solution is sodium carbonate and water, said second solution is potassium permanganate and water and said third solution is chlorine and water.

Claim 7

Dependent Claim 32 words

The method as set forth in claim 5 wherein said first solution is a sodium carbonate and water, said second solution is water and said third solution is potassium permanganate and water.

Claim 8

Dependent Claim 31 words

The method as set forth in claim 5 wherein said first solution is water, said second solution is potassium permanganate and water and said third solution is sodium carbonate and water.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1976-05-21	1976-11-20	1977-05-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1980-05-21	1980-11-20	1981-05-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1984-05-21	1984-11-20	1985-05-22	$7700.00	Window Closed / Lapsed

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