GB1424941A - Method of removing oxides of sulphur from waste gas - Google Patents

Method of removing oxides of sulphur from waste gas

Info

Publication number
GB1424941A
GB1424941A GB34374A GB34374A GB1424941A GB 1424941 A GB1424941 A GB 1424941A GB 34374 A GB34374 A GB 34374A GB 34374 A GB34374 A GB 34374A GB 1424941 A GB1424941 A GB 1424941A
Authority
GB
United Kingdom
Prior art keywords
aqueous medium
waste gas
sulphur
contacting zone
per cent
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
GB34374A
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.)
Pullman Inc
Original Assignee
Pullman Inc
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 Pullman Inc filed Critical Pullman Inc
Priority to GB34374A priority Critical patent/GB1424941A/en
Publication of GB1424941A publication Critical patent/GB1424941A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)

Abstract

1424941 Removal of sulphur oxides PULLMAN Inc 4 Jan 1974 00343/74 Heading C1A A process for removing oxides of sulphur from industrial waste gas comprises: scrubbing said waste gas in a contacting zone with an aqueous medium having a pH below 7À1 containing calcium carbonate, carbon dioxide and at least 3 wt. per cent of one of sodium, lithium, potassium, magnesium and ammonium sulphates; precipitating solids comprising calcium sulphate and/or calcium sulphite from the aqueous medium; removing a portion of said solids; and introducing a further portion of said solids with said aqueous medium to the contacting zone. Preferably the concentration of soluble sulphate in the aqueous medium is in the range 5 to 27 wt. per cent; the waste gas and the aqueous medium are contacted in a Venturi scrubber for less than 3 seconds; and the temperature of the contacting zone lies between 100‹ and 180‹ F., the pressure therein being 12 to 18 p.s.i.a. In an improved embodiment of the process, at least part of the aqueous medium is recovered as an aqueous supernatant liquor containing at least 3 wt. per cent of one of the above-mentioned soluble sulphates, and said aqueous supernatant is separately introduced to the contacting zone. When the waste gas contains free oxygen or sulphur trioxide the soluble sulphates may be generated in situ by the addition of ammonia or the oxide, hydroxide, carbonate, bicarbonate, sulphite or bisulphite of sodium, lithium, potassium, magnesium or ammonium or mixtures thereof.
GB34374A 1974-01-04 1974-01-04 Method of removing oxides of sulphur from waste gas Expired GB1424941A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB34374A GB1424941A (en) 1974-01-04 1974-01-04 Method of removing oxides of sulphur from waste gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB34374A GB1424941A (en) 1974-01-04 1974-01-04 Method of removing oxides of sulphur from waste gas

Publications (1)

Publication Number Publication Date
GB1424941A true GB1424941A (en) 1976-02-11

Family

ID=9702728

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34374A Expired GB1424941A (en) 1974-01-04 1974-01-04 Method of removing oxides of sulphur from waste gas

Country Status (1)

Country Link
GB (1) GB1424941A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee