[특허]Process for reduction of inorganic contaminants from waste streams

Process for reduction of inorganic contaminants from waste streams 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C02F-001/42
출원번호	US-0976519 (2004-10-29)
등록번호	US-7341667 (2008-03-11)
발명자 / 주소	Kennard,Claude Gonzalez,Michael A. Szlag,David C.
출원인 / 주소	MAR Systems, LLC The United States of America as represented by the Administrator of the U.S. Environmental Protection Agency
대리인 / 주소	Wilmer, Cutler, Pickering, Hale and Dorr LLP
인용정보	피인용 횟수 : 17 인용 특허 : 84

초록 ▼

The invention relates to the use of used alumina to reduce the level of inorganic contaminants, such as mercury and arsenic, from waste fluid streams. The invention further provides a process for reducing the level of mercury or arsenic in fluid streams by contacting the fluid stream with used alumi

대표청구항 ▼

We claim: 1. A process for reducing the level of arsenic from a liquid stream comprising contacting said liquid stream with used alumina, wherein the used alumina is used Claus catalyst having a sulfur concentration of 0.1%-2.0% by weight, and wherein the liquid stream is an aqueous stream. 2. A process for reducing the level of arsenic from a liquid stream containing arsenic, comprising the steps of: (a) flowing the liquid stream through a bed containing a sorbent, wherein the sorbent comprises used alumina, wherein the used alumina is used Claus catalyst having a sulfur concentration of 0.1%-2.0% by weight, and wherein the liquid stream is an aqueous stream; (b) sorbing arsenic from the liquid stream onto the surface of the sorbent; and (c) allowing the arsenic-depleted effluent stream to exit from the outlet of the bed. 3. The process of claim 1, wherein the used alumina is crushed prior to contacting said liquid stream. 4. The process of claim 3, wherein the used alumina is heated to remove moisture prior to contacting said liquid stream. 5. The process of claim 1, wherein at least about 50% of arsenic is removed from said liquid stream. 6. The process of claim 1, wherein at least about 75% of arsenic is removed from said liquid stream. 7. The process of claim 1, wherein at least about 90% of arsenic is removed from said liquid stream. 8. The process of claim 1, wherein the arsenic is elemental arsenic. 9. The process of claim 1, wherein the arsenic is ionic arsenic. 10. The process of claim 1, wherein the arsenic is arsenic(V). 11. The process of claim 2, wherein the used alumina is crushed prior to being loaded on the bed. 12. The process of claim 11, wherein the used alumina is heated to remove moisture prior to being loaded on the bed. 13. The process of claim 2, wherein at least about 50% of arsenic is removed from said liquid stream. 14. The process of claim 2, wherein at least about 75% of arsenic is removed from said liquid stream. 15. The process of claim 2, wherein at least about 90% of arsenic is removed from said liquid stream. 16. The process of claim 2, wherein the arsenic is elemental arsenic. 17. The process of claim 2, wherein the arsenic is ionic arsenic. 18. The process of claim 2, wherein the arsenic is arsenic(V).

이 특허에 인용된 특허 (84)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Process for reduction of inorganic contaminants from waste streams 원문보기

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Process for reduction of inorganic contaminants from waste streams 원문보기

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