High capacity solid filtration media

a technology of solid filtration media and high capacity, which is applied in the direction of filtration separation, separation process, dispersed particle separation, etc., can solve the problems of flammability of hsub>2/sub>s, corroding chlorine effect on electronic circuitry, and poisonous nitrogen dioxide, etc., to achieve high capacity, improve efficiency and capacity in removing, and high capacity

Inactive Publication Date: 2007-07-12
PURAFIL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0030] The high capacity filtration media, the method of preparation, and the method of use provide improved efficiency and capacity in removing contaminants, particularly odor-causing contaminants, from gas streams.
[0031] Accordingly, it is an object of the present invention to provide a high capacity solid filtration media that efficiently removes undesirable compounds from an air stream to reduce odors, minimize the corrosion of met...

Problems solved by technology

Furthermore, H2S is flammable.
At lower levels, in combination with moisture, chlorine has a corrosive effect on electronic circuitry, stainless steel and the like.
Nitrogen dioxide, however, is a deadly poison.
Inhalation of the vapor is known to irritate the respiratory tract.
Furthermore, exposure to high concentrations of isopropyl alcohol can have a narcotic effect, producing symptoms of dizziness, drowsiness, headache, staggering, unconsciousness and possibly death.
Control of this compound prolongs the marketable life of such items.
The airborne compounds described above can have a detrimental effect on the local environment.
For example, acidification is caused by emissions of sulfur dioxide and nitrogen compounds (nitrogen oxides and ammonia), w...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of Filtration Media Containing 13% Sodium Permanganate

[0074] A sodium permanganate impregnated alumina composition is prepared as follows.

[0075] A dried feed mix is prepared by combining, by weight, 80-85% alumina, and 15-20% sodium bicarbonate. The dry feed mixture is sprayed with a heated aqueous sodium permanganate solution at 180 to 190° F. while being tumbled in a tumble mill. The resulting pellets are dried at 130 to 140° F. until the pellets contain about 20 to 25% free water.

[0076] To prepare solid filtration media containing approximately 13% sodium permanganate by dry weight, the aqueous sodium permanganate solution preferably contains approximately 26% sodium permanganate by weight. It is to be understood that the aqueous sodium permanganate solution is sprayed onto the dry feed while the dry mix is rolled in the pelletizing disk as described in U.S. Pat. No. 3,226,332, incorporated herein by reference.

example 2

Preparation of Filtration Media Containing 4-5% Potassium Permanganate

[0077] A 4-5% potassium permanganate impregnated alumina composition was prepared as follows.

[0078] A dry feed mix, consisting of 100% alumina, was sprayed with a heated aqueous potassium permanganate solution at 180 to 190° F. while the dried feed was tumbled in a tumble mill. The resulting pellets were then dried at 130 to 140° F. until the pellets contained about 20 to 25% free water.

[0079] To prepare solid filtration media containing approximately 4-5% potassium permanganate by dry weight, the aqueous potassium permanganate solution preferably contained approximately 10% potassium permanganate by weight. It is to be understood that the aqueous potassium permanganate solution was sprayed onto the dry feed while the dry mix was rolled in the pelletizing disk as described in U.S. Pat. No. 3,226,332.

example 3

Preparation of Filtration Media Containing 19-20% Sodium Permanganate

[0080] A 19-20% sodium permanganate impregnated alumina composition was prepared as follows.

[0081] A dried feed mix, consisting of 100% alumina, was sprayed with a heated aqueous sodium permanganate solution at 180 to 190° F. while the dried feed was being tumbled in a tumble mill. The resulting pellets were then dried at 130 to 140° F. in air until the pellets contained about 20 to 25% free water.

[0082] To prepare a solid filtration media containing approximately 19-20% sodium permanganate, by dry weight, the aqueous solution preferably contained approximately 40% sodium permanganate, by weight. It is to be understood that the aqueous potassium permanganate solution was sprayed on to the dry feed while the dry feed was rolled in the pelletizing disk as described in U.S. Pat. No. 3,226,332.

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Abstract

A high capacity filtration media, method of preparing the media, and method of treating a fluid stream with the media are provided. The media contain a porous substrate impregnated with high concentrations of a permanganate. Preferably, the media includes a porous substrate impregnated with at least about 8% permanganate by weight. The media can optionally contain sodium bicarbonate. Improved capacity for the removal of undesirable compounds such as ethylene, formaldehyde, hydrogen sulfide and methyl mercaptan are achieved.

Description

TECHNICAL FIELD [0001] The present invention relates generally to a composition and method for the removal of compounds having disagreeable odors, toxic properties or corrosive properties from gaseous streams. The invention more particularly relates to the use in filter beds of a high capacity solid filtration media containing a substrate impregnated with a permanganate. BACKGROUND OF THE INVENTION [0002] The removal of toxic, corrosive and odorous gases can be accomplished by a number of techniques. These may include wet scrubbing, incineration, and removal via gas-phase air filtration using a variety of dry scrubbing adsorptive, absorptive, and / or chemically impregnated media. As opposed to these other methods, gas-phase air filtration does not require the consumption of large quantities water or fuel. Dry-scrubbing media can be engineered from a number of common adsorbent materials with or without chemical additives for the control of a broad spectrum of gases or tailored for spe...

Claims

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Application Information

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IPC IPC(8): B01D46/00B01D39/20B01D53/04B01D53/44B01D53/48B01D53/52B01D53/54B01D53/56B01D53/58B01D53/62B01D53/64B01D53/68B01D53/72
CPCB01D39/2068B01J20/0222B01D53/52B01D53/54B01D53/565B01D53/58B01D53/62B01D53/685B01D53/72B01D2251/10B01J20/04B01J20/3236B01D53/02B01J20/08B01J20/3078B01J20/3204B01J2220/56B01J20/043B01J20/12B01J20/16B01D53/485B01D53/48B01D53/82B01D2251/304B01J20/06
Inventor ENGLAND, WILLIAM G.
Owner PURAFIL
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