Title:
SEPARATION OF METAL SULFATE FROM SULFURIC ACID
Document Type and Number:
Japanese Patent JPS6456304
Kind Code:
A
Abstract:
PURPOSE: To economically and efficiently obtain metal sulfate useful to chemical industrial fields, etc., by cooling a sulfuric acid solution concentrated by a specified concentration, adding Fe (III) salt, and separating a formed solid metal sulfate (hydrogen sulfate).
CONSTITUTION: Sulfuric acid such as diluted sulfuric acid containing the metal sulfate is concentrated up to 55-75 wt.% H2SO4 concentration with evaporation to obtain a solution or a suspension liquid. Next, the solution is added the Fe (III) salt and is kept at 0.01 wt.% Fe (III) contents, next being cooled and produced solid metal sulfate and/or hydrogen sulfate. The solution is separated by a mechanical separation method such as filtering to obtain the metal sulfate.
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Inventors:
GIYUNTAA RAIRATSUHA
RUDORUFU GERUKEN
BORUFUGANGU RENSU
RUDORUFU GERUKEN
BORUFUGANGU RENSU
Application Number:
JP19074188A
Publication Date:
March 03, 1989
Filing Date:
August 01, 1988
Export Citation:
Assignee:
BAYER AG
International Classes:
C01B17/90; C01G23/053; C22B3/22; C23G1/36; (IPC1-7): C01B17/90
Attorney, Agent or Firm:
Heiyoshi Odashima