A Study on the Preparation of Oil Hydrogenation Catalysts Using Nickel Extracted from the Spent Catalysts

폐촉매로부터의 니켈 추출 및 이를 이용한 유지경화용 수소화 촉매의 제조

  • 김태진 (인하대학교 공과대학 화학공학과) ;
  • 차익수 (오뚜기 중앙연구소) ;
  • 이희철 (인하대학교 공과대학 화학공학과) ;
  • 안화승 (인하대학교 공과대학 화학공학과)
  • Received : 1993.09.20
  • Accepted : 1994.09.17
  • Published : 1994.12.01

Abstract

Nickel recovered from the spent oil-hydrogenation catalysts was used in hydrogenation catalyst preparation. The spent catalyst contains approximately 21.8% Ni, 0.7% Mg, and small quantities of Al, Fe, and Zn. Nickel recovery was obtained by inorganic acid digestion in the order of HCI>$NHO_3$>$H_2SO_4$. For $HNO_3$, 3hour extraction with 3N solution was satisfactory. In the PH range of 6.5~9.0, Ni recovery was higher, but metallic impurities were found to be coprecipitated. The PH in the range of 7.0~9.0 seems to be the optimum condition for separation to obtain acceptable Ni precipitates without the decrease of purity. The catalysts prepared with reclaimed nickel by wet reduction methods showed catalytic activities close to those prepared using reagent nickel in the oil hydrogenation reaction. The surface areas of the support do not seem to affect the catalytic activity.

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Acknowledgement

Supported by : 산학협동재단, (주)조봉