GB1102463A - Improvements in or relating to a process for the treatment of spent acid liquors - Google Patents

Improvements in or relating to a process for the treatment of spent acid liquors

Info

Publication number
GB1102463A
GB1102463A GB4931863A GB4931863A GB1102463A GB 1102463 A GB1102463 A GB 1102463A GB 4931863 A GB4931863 A GB 4931863A GB 4931863 A GB4931863 A GB 4931863A GB 1102463 A GB1102463 A GB 1102463A
Authority
GB
United Kingdom
Prior art keywords
acid
salt
liquor
recovered
spent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4931863A
Inventor
Frederick Molyneux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MOLBROS Ltd
Original Assignee
MOLBROS Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MOLBROS Ltd filed Critical MOLBROS Ltd
Priority to GB4931863A priority Critical patent/GB1102463A/en
Publication of GB1102463A publication Critical patent/GB1102463A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/36—Regeneration of waste pickling liquors
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/69—Sulfur trioxide; Sulfuric acid
    • C01B17/90—Separation; Purification
    • C01B17/901—Recovery from spent acids containing metallic ions, e.g. hydrolysis acids, pickling acids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

An acid is recovered from a spent acid liquor containing the acid and a contaminating salt by adding to the liquor a chemical compound to reduce the solubility of the salt or to convert it to another salt of reduced solubility, and passing the liquor through a tower containing packing countercurrent to a stream of air, whereby the solution is cooled and the salt crystallizes and is removed. The added chemical compound may be ammonium sulphate, sodium chloride, sulphuric acid, an anionic surface tension reducing agent, or an aqueous solution of acetone or an alcohol. In one embodiment, sulphuric acid is added to a spent liquor containing HCl and FeCl2, the FeCl2 being subsequently crystallized and the HCl recovered. In another embodiment, ammonium sulphate is added to a pickling liquor containing H2SO4 and FeSO4, the ferrous ammonium sulphate thus formed being subsequently crystallized and the H2SO4 recovered. The process is also applicable to spent liquors containing nitric acid or hydrofluoric acid.
GB4931863A 1963-12-13 1963-12-13 Improvements in or relating to a process for the treatment of spent acid liquors Expired GB1102463A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4931863A GB1102463A (en) 1963-12-13 1963-12-13 Improvements in or relating to a process for the treatment of spent acid liquors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4931863A GB1102463A (en) 1963-12-13 1963-12-13 Improvements in or relating to a process for the treatment of spent acid liquors

Publications (1)

Publication Number Publication Date
GB1102463A true GB1102463A (en) 1968-02-07

Family

ID=10451941

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4931863A Expired GB1102463A (en) 1963-12-13 1963-12-13 Improvements in or relating to a process for the treatment of spent acid liquors

Country Status (1)

Country Link
GB (1) GB1102463A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4104365A (en) * 1976-05-27 1978-08-01 John Howard Method of separating sulfuric acid from neutral sodium sulfate in spent chlorine dioxide generator liquor
WO1981002026A1 (en) * 1980-01-18 1981-07-23 Boliden Ab A method of regenerating pickling bath solutions
WO2001049901A1 (en) * 2000-01-05 2001-07-12 United States Filter Corporation Regenerating spent pickling liquor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4104365A (en) * 1976-05-27 1978-08-01 John Howard Method of separating sulfuric acid from neutral sodium sulfate in spent chlorine dioxide generator liquor
WO1981002026A1 (en) * 1980-01-18 1981-07-23 Boliden Ab A method of regenerating pickling bath solutions
WO2001049901A1 (en) * 2000-01-05 2001-07-12 United States Filter Corporation Regenerating spent pickling liquor

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