Process, method, and system for removing heavy metals from fluids
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C10G-025/00
C10G-025/02
C10G-025/03
C10G-025/05
C10G-029/02
C10G-025/12
C10G-025/06
C10G-029/20
C10G-029/26
C10G-057/00
출원번호
US-0923514
(2015-10-27)
등록번호
US-9598648
(2017-03-21)
발명자
/ 주소
O'Rear, Dennis John
Wang, Wei
Malekzadeh, Nga
출원인 / 주소
Chevron U.S.A. Inc.
대리인 / 주소
Owens, Howard V.
인용정보
피인용 횟수 :
0인용 특허 :
10
초록▼
A process for removing non-volatile, particulate mercury from crudes and condensates is disclosed. Particulate mercury in crudes can be removed by a process of first adding a halogen, such as I2. The halogen converts at least 10% of the particulate mercury into an oil-soluble mercury compound that c
A process for removing non-volatile, particulate mercury from crudes and condensates is disclosed. Particulate mercury in crudes can be removed by a process of first adding a halogen, such as I2. The halogen converts at least 10% of the particulate mercury into an oil-soluble mercury compound that cannot be removed by filtration or centrifugation. This oil-soluble mercury compound can then be removed by adsorption onto a solid adsorbent. The process can operate at near ambient conditions. The adsorption step can be carried out by mixing a particulate adsorbent in the halogen-treated crude and then removing it by centrifugation, desalting, filtration, hydrocyclone or by settling.
대표청구항▼
1. A non-aqueous process to remove mercury from a crude, the process comprising: mixing the crude containing particulate mercury with a halogen to form a digested crude to covert at least 10% of the particulate mercury into an oil-soluble mercury complex in the oil phase,contacting the digested crud
1. A non-aqueous process to remove mercury from a crude, the process comprising: mixing the crude containing particulate mercury with a halogen to form a digested crude to covert at least 10% of the particulate mercury into an oil-soluble mercury complex in the oil phase,contacting the digested crude with an adsorbent to remove at least 50% of the total mercury from the digested crude. 2. The process of claim 1, wherein the oil-soluble mercury complex comprises HgI2. 3. The process of claim 1, wherein the digested crude contains less than 2% total water as measured by Karl Fischer method. 4. The process of claim 1, wherein the halogen is selected from the group consisting of bromine, iodine and combinations thereof. 5. The process of claim 1, wherein the halogen is in the form of an organic solution. 6. The process of claim 1, wherein the mixing and the contacting are under conditions to maintain the crude essentially in the liquid state. 7. The process of claim 6, wherein the conditions comprise temperature and pressure for the crude to be below its bubble point. 8. The process of claim 1, wherein the halogen comprises iodine and bromine, and wherein the iodine and bromine are present at a I2:Br2 molar ratio of greater than or equal to 0.1 and less than or equal to 1000. 9. The process of claim 8, wherein the I2:Br2 molar ratio is greater than or equal to 5 and less than or equal to 100. 10. The process of claim 8, wherein the I2:Br2 molar ratio is greater than or equal to 10 and less than or equal to 50. 11. The process of claim 1, wherein the adsorbent is selected from the group consisting of sulfur-containing polymers, anion exchange resins, molecular sieves, zeolites, metal organic framework (MOF) materials, metal oxides treated with sulfur compounds, carbon treated with sulfur compounds, clays, synthetic layered materials, sulfur-treated MOFs, self-assembled monolayers on mesoporous supports, selenium modified adsorbents, and combinations thereof. 12. The process of claim 1, wherein the adsorbent is a sulfur-treated metal oxides and carbon treated with sulfur compounds and the sulfur compounds are selected from the group consisting of thiosulfates, polysulfides and combinations thereof. 13. The process of claim 1, wherein the adsorbent is selected from the group consisting of thiosulfate-impregnated silica, polysulfide impregnated alumina, and combinations thereof. 14. The process of claim 1, wherein the adsorbent is essentially non-leachable. 15. The process of claim 1, wherein the contacting the digested crude with the adsorbent is in a process selected from the group consisting of a fixed bed, a fluidized bed, an ebullated bed, and expanded bed, and combinations thereof. 16. The process of claim 1, wherein the adsorbent is in the form of a powder and the powder is separated from the digested crude by processes selected from the group consisting of settling, filtration, centrifugation, hydrocyclones and combinations thereof. 17. The process of claim 1, wherein the crude is a fine-particulate high-mercury crude or condensate. 18. The process of claim 1, wherein the crude is predominantly non-volatile. 19. The process of claim 1, wherein the crude has a particulate mercury content of 10% or more. 20. The process of claim 1, further comprising recovery of the adsorbent and wherein the adsorbent to be recovered has a total mercury content of 100 ppm or more. 21. The process of claim 20, wherein the halogen is iodine and wherein at least a portion of the iodine and iodide that is adsorbed on the recovered adsorbent is recycled and mixed with a crude to form a digested crude.
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이 특허에 인용된 특허 (10)
Sato, Kazuo; Shibuya, Hiromitsu, Mercury-removal adsorbent, method of producing mercury-removal adsorbent, and method of removing mercury by adsorption.
Markovs John (Yorktown Hts. NY) Maurer Richard T. (Nanuet NY) Zarchy Andrew S. (Amawalk NY) Holmes Ervine S. (Yorktown Hts. NY), Removal of mercury from process streams.
Johnson Marvin M. (Bartlesville OK) Tooley Patricia A. (Bartlesville OK) Delzer Gary A. (Bartlesville OK) Nowack Gerhard P. (Bartlesville OK) Cymbaluk Ted H. (Bartlesville OK), Trialkyl arsine sorbents.
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