MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Recovery of Molybdenum from Spent Acid by Ammonia Gas Neutralization
Jong-Jin Pak, Jong-Oh Jo, Chul-Hwan Park, Jin-Goo Kang, Dong-Hyuk Shin
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Keywords: spent acid, molybdenum, ammonia neutralization, ammonium molybdate, chemical fertilizer
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2008 Volume 49 Issue 1 Pages 202-207

View "Advance Publication" version (December 12, 2007).
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Abstract

The present work reports the commercialization of a recycling process of spent acid to recover molybdenum. The process consists of ammonia gas neutralization of spent acid containing molybdenum, crystallization and filtration of ammonium molybdate, roasting and hydrogen reduction of molybdic oxide to produce a commercial grade molybdenum metal powder. The mother liquor, highly nitrogeneous residual solution after the filtration of ammonium molybdate, can be utilized to produce chemical fertilizers.

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© 2008 The Japan Institute of Metals and Materials
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