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Patent Searching and Data


Title:
PROCESS FOR PURIFYING ZINC AND RECTIFYING COLUMN FOR PURIFYING ZINC
Document Type and Number:
WIPO Patent Application WO/2002/050320
Kind Code:
A1
Abstract:
A process for purifying zinc wherein a zinc containing impurities is introduced to a rectifying column having a plurality of column plates for purification, characterized in that the distillation of zinc is carried out while maintaining the rectifying column under a reduced pressure, to thereby remove the impurities and produce a high purity zinc.

Inventors:
TANNO FUMIO
MATSUZAKI KENJI
Application Number:
PCT/JP2001/010957
Publication Date:
June 27, 2002
Filing Date:
December 13, 2001
Export Citation:
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Assignee:
MITSUI MINING & SMELTING CO (JP)
International Classes:
C22B9/02; C22B9/04; C22B17/06; C22B19/14; C22B19/16; C22B19/32; (IPC1-7): C22B9/02; C22B11/02; C22B13/02; C22B15/00; C22B17/02; C22B19/32; C22B21/06
Foreign References:
JPS54107422A1979-08-23
JPH06108175A1994-04-19
JPS369157B11961-06-30
JPS3614110B11961-08-23
Other References:
See also references of EP 1371739A4
Attorney, Agent or Firm:
Mori, Hiroyuki c/o Fusoh, Patent Firm Rindo Building 5F 37 (Kanda-Higashimatsushita-cho Chiyoda-ku, Tokyo, JP)
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