脫黃 廢觸媒로부터 有價金屬 抽出
Extraction of Valuable Metals from Spent Desulfurizing Catalyst
0
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
황산으로 탈황 폐촉매를 침출한 결과 황산농도 1 M, 반응시간 1 hr인 실험조건에서 Ni 및 V은 95% 이상, 그리고 Mo은 30%가 침출되었다. 탈황 폐촉매의 Mo matrix 특성으로 인하여 다른 금속에 비하여 Mo의 침출율이 낮았으며, 본 침출반응은 확산반응에 의하여 제어되는 것으로 판단된다. Mo을 완전히 침출하기 위하여 유황성분이 제거된 폐촉매로 침출실험을 실시하였다. 1 M 황산으로 처리후 탄산나트륨으로 세척시 Ni, Mo 그리고 V의 침출율은 99%이었다. Ni 2 g/L; V 9 g/L, Mo 0.6 g/L 조성의 침출액을 LIX 84I로 용매추출한 조건에서 A:O 비 5:2, 2단계로 처리시 Mo은 98% 이상 추출되었으며 A:O 비 5:3, 2단계로 처리시 V은 82%가 추출되었다.
Abstract
Sulphuric acid leaching was conducted to extract the metal values from spent refinery catalyst. More than 95% of Ni and V and 30% of Mo could be leached out in 1 M sulphuric acid and 1 hr of leaching time. The decrease in Mo leaching was due to typical characteristic of Mo matrix. The activation energies of the leaching reactions showed the dissolution process follows a diffusion control mechanism. In order to leach out all Mo, further the leaching experiments were conducted with sulfur free spent refinery catalyst. For sulfur free spent refinery catalyst, a two step process of leaching with 1 M sulphuric acid followed by sodium carbonate washing showed better leaching than a two step leaching process with sodium carbonate followed by sulphuric acid washing, with almost 99% leaching of Ni, Mo and V. Solvent extraction using LIX 84I were conducted for a leach liquor containing Ni, 2 g/L; V, 9 g/L, Mo, 0.6 g/L. More than 98% of Mo was extracted from the leach liquor at A:O ratio of 5:2 in a 2 stage process. Similarly V was extracted at A:O ratio of 5:3 in a 2 stage process with 82% of total V extraction.
참고문헌 (17)
- J. R. Davis, "Tool Materials" (1995), ASM International
- M.F. Ashby, "Engineering Materials 2 (with corrections ed.)" (1992), Pergamon Press
- "Molyreview", International Molybdenum Association, ~ (2010)
- R.R. Moskalyk, "Processing of vanadium: a review", Minerals Engineering, 16, pp.793~805 (2003)
- M. Peters, "Metastabile - Legierungen", pp.23~24 (2002), Titan und Titanlegierungen Wiley-VCH
- Recognizing the Best in Innovation, "Breakthrough Catalysis", R&D Magazine, pp.20~ (2005)
- Anon, "Vanadium Statistics and Information in Mineral Commodity Summaries", U.S.A. Government Minerals Publications Website, ~ (2003)
- R.P. Silvy, "Future trends in refining catalyst market", Applied Catalysis, 261, pp.247~252 (2004)
- M. Absi-Halabi, "Trends in catalysis research to meet future refining needs", pp.45~55 (1997), Hydrocarbon Process
- P. Dufresne, "Hydroprocessing catalysts regeneration and recycling", Applied Catalysis A: General, 322, pp.67~75 (2007)
- M. Marafi, "Spent hydroprocessing catalyst management: A review Part II. Advances in metal recovery and safe disposal methods", Resources, Conservation and Recycling, 53, pp.1~26 (2008)
- United States Environmental Protection Agency (USEPA), "Hazardous waste management system", Federal Register, 68(202), pp.55935~55940 (2003)
- E. Furimsky, "Spent refinery catalysts: environment, safety and utilization", Catalysis Today, 30, pp.223~286 (1996)
- T. Chang, "Spent catalyst options, reclamation and landfill processes are alternatives to regeneration", Oil and Gas Journal, pp.79~84 (1998)
- D. Pradhan, "Dissolution kinetics of spent petroleum catalyst using two different acidophiles", Hydrometallurgy, 99, pp.157~162 (2009)
- H.Y. Sohn, "process of extractive metallurgy" (1979), Plenum Press
- P.K. Parhi, "Separation of cobalt and nickel from ammoniacal sulphate solution using Cyanex 272", Separation and Purification Technology, 59, pp.310~317 (2008)