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Recovery of ferrous sulfate crystals from pickling liquor


Yang, Kai-Jin (1926) Recovery of ferrous sulfate crystals from pickling liquor. Bachelor's thesis, California Institute of Technology.


Pickling liquor is nothing more than dilute sulfuric acid used in the iron and steel industry for removing scales on the surface of iron work which is to be further treated. The reaction for pickling may be represented by the equation FeO + H2SO4 = FeSO4 + H2O. Thus we see from this equation that H2SO4 is gradually used up and FeSO4 formed during the process. It is evident, then, after a certain length of time, H2SO4 will be too valuable to be cast away. This FeSO4 may be converted into an oxide which is a pigment, or taken out in the form of FeSO4.7H2O crystals. The latter is the purpose of this work. FeSO4 has the following uses: photography; writing ink; Prussian blue; preparation of iron oxide for illuminating gas purification; water purification; medicine; disinfectant; textile and leather industries; analytical reagent; making other iron salts.

Item Type:Thesis (Bachelor's thesis)
Subject Keywords:Chemistry
Degree Grantor:California Institute of Technology
Division:Chemistry and Chemical Engineering
Major Option:Chemistry
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Unknown, Unknown
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1926
Record Number:CaltechETD:etd-01032005-112533
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6
Deposited By: Imported from ETD-db
Deposited On:05 Jan 2005
Last Modified:10 May 2016 19:07

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PDF (Yang_kj_1926.pdf) - Final Version
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