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Air filtration media comprising metal-doped silicon-based gel materials

A technology of filter medium and gel material, applied in the direction of loose filter material filter, filtration separation, gravity filter, etc., can solve the problem of toxic gas regeneration threat, etc., and achieve the effect of high-efficiency ammonia absorption and penetration properties

Inactive Publication Date: 2008-06-18
J M HUBER CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, this easy regeneration of the toxic gas (ie, allowing the trapped gas to be released) by raising the temperature or changing the pressure poses a threat to the target environment

Method used

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  • Air filtration media comprising metal-doped silicon-based gel materials
  • Air filtration media comprising metal-doped silicon-based gel materials
  • Air filtration media comprising metal-doped silicon-based gel materials

Examples

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Embodiment Construction

[0020]For the purposes of the present invention, the term "silicon-based gel" includes materials formed by the reaction of metal silicates (such as sodium silicate) with acids (such as sulfuric acid), allowed to age appropriately to form gel materials, or obtainable from A material of natural origin, having a similar pore structure to the gel formed by the method described above (eg material from rice hulls). These synthetic materials can be classified as silicic or polysilicic or colloidal, whereas natural source materials are usually obtained in some form and finally processed into the final gel-like product (such as described in U.S. Patent No. 6,638,354 ). The difference between the two synthetic species is strictly within the pH of the gel measured after reaction, formation and aging. If the pH after this period was below 3.0, the gel was considered to be silicic or polysilicic. If the pH is at or above 3.0, the material is considered to be (conventional) silica gel. I...

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Abstract

The present invention relates generally to an environmental control unit for use in air handling systems that provides highly effective filtration of noxious gases (such as ammonia). Such a filtration system utilizes novel metal-doped silica-based gels to trap and remove such undesirable gases from an enclosed environment. Such gels exhibit specific porosity requirements and density measurements. Furthermore, in order for proper metal doping to take effect, such gels must be treated while in a wet state. The combination of these particular properties and metal dopant permits highly effective noxious gas filtration such that uptake and breakthrough results are attained, particularly in comparison with prior silica gel filtration products. Methods of using and specific filter apparatuses are also encompassed within this invention.

Description

field of invention [0001] The present invention generally relates to environmental control for air handling systems capable of efficiently filtering out toxic gases, such as ammonia. This filtration system uses a novel metal-doped silica-based gel to capture and remove these unwanted gases from a closed environment. These gels need to meet special porosity requirements and density measurements. In addition, for the most efficient metal doping, these gels are preferably treated with polyvalent metal salts in the wet state. Combining these exceptional properties with metal dopants allows for highly efficient filtration of toxic gases, resulting in excellent uptake and breakthrough results, notable compared to previous media filtration products . Methods of use and specific filtering devices are also included in the present invention. Background of the invention [0002] There is an ever-increasing demand for air treatment systems comprising air filtration systems capable o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D24/00B01D39/00
CPCB01J20/28083B01D2257/406B01J20/3204B01J20/28071B01D2253/106B01J20/2803B01J20/103B01J20/3236B01J20/0237B01J20/28061B01D53/02B01J20/28073B01J20/02Y10T428/2991
Inventor F·A·辛克莱尔D·K·弗里德M·C·威瑟曼
Owner J M HUBER CORP