GB490512A - Improvements in or relating to the removal of sulphur dioxide from waste gases - Google Patents

Improvements in or relating to the removal of sulphur dioxide from waste gases

Info

Publication number
GB490512A
GB490512A GB30843/36A GB3084336A GB490512A GB 490512 A GB490512 A GB 490512A GB 30843/36 A GB30843/36 A GB 30843/36A GB 3084336 A GB3084336 A GB 3084336A GB 490512 A GB490512 A GB 490512A
Authority
GB
United Kingdom
Prior art keywords
concentration
temperature
sulphur dioxide
solution
mols
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
GB30843/36A
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.)
University of Illinois
Original Assignee
University of Illinois
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 University of Illinois filed Critical University of Illinois
Publication of GB490512A publication Critical patent/GB490512A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00Sulfur; Compounds thereof
    • C01B17/48Sulfur dioxide; Sulfurous acid
    • C01B17/50Preparation of sulfur dioxide
    • C01B17/60Isolation of sulfur dioxide from gases

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Treating Waste Gases (AREA)

Abstract

In the recovery of sulphur dioxide from gases by absorbing it in a solution containing ammonium sulphite and ammonium bisulphite and then heating the solution to liberate the sulphur dioxide and to regenerate the solution for further use, the optimum concentration of ammonia in the solution for varying conditions of operation is calculated from an equation taking into account the concentration of sulphur dioxide in the gases treated, the temperature of the extracting solution leaving the scrubber, and the temperature of regeneration, maximum scrubbing and regenerating efficiency being assumed. The value of the optimum concentration decreases as the temperature of absorption increases and as the temperature of regeneration increases, and increases as the concentration of sulphur dioxide in the gases treated increases. The optimum concentration found from the equation is not critical and concentrations 10 per cent above and below it may be used. When the optimum concentration is above about 22 mols. ammonia per 100 mols. water, and therefore exceeds the limit of solubility of the ammonium salts in the solution, a concentration as high as possible is used. A table is given showing the optimum concentration for gases containing 0,3 per cent sulphur dioxide at various absorption and regenerating temperatures; in practuce, using for instance an absorption temperature of 45 DEG C. and a regenerating temperature of 100 DEG C., a concentration of between 11 and 14 mols. ammonia per 100 mols. water would be used. If desired, instead of the ammonia concentration being varied to suit different conditions of operation, this may remain constant, and the equation then be used to vary say the temperature of absorption or regeneration with variation in the composition of the gases treated. The Specification as open to inspection under Sect. 91 states that a similar equation could be developed to determine the optimum concentration when using a solution containing sodium sulphite and sodium bisulphite. This subject-matter does not appear in the Specification as accepted.
GB30843/36A 1935-12-23 1936-11-11 Improvements in or relating to the removal of sulphur dioxide from waste gases Expired GB490512A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US490512XA 1916-03-29 1916-03-29

Publications (1)

Publication Number Publication Date
GB490512A true GB490512A (en) 1938-08-11

Family

ID=21957803

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30843/36A Expired GB490512A (en) 1935-12-23 1936-11-11 Improvements in or relating to the removal of sulphur dioxide from waste gases

Country Status (2)

Country Link
FR (1) FR490512A (en)
GB (1) GB490512A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2589684A (en) * 1947-10-03 1952-03-18 Ici Ltd Recovery of so2
DE1267671B (en) * 1963-12-03 1968-05-09 Zieren Chemiebau Gmbh Dr A Process for the recovery of sulfur oxides and ammonia from the aqueous washing solution of the ammonia laundry of sulfur dioxide-containing exhaust gases

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2589684A (en) * 1947-10-03 1952-03-18 Ici Ltd Recovery of so2
DE1267671B (en) * 1963-12-03 1968-05-09 Zieren Chemiebau Gmbh Dr A Process for the recovery of sulfur oxides and ammonia from the aqueous washing solution of the ammonia laundry of sulfur dioxide-containing exhaust gases
DE1267671C2 (en) * 1963-12-03 1973-02-15 Zieren Chemiebau Gmbh Dr A Process for the recovery of sulfur oxides and ammonia from the aqueous scrubbing solution of the ammonia laundry of exhaust gases containing sulfur dioxide

Also Published As

Publication number Publication date
FR490512A (en) 1919-04-26

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