FR2139752A1 - Removal of sulfur dioxide from waste gases - Google Patents

Removal of sulfur dioxide from waste gases

Info

Publication number
FR2139752A1
FR2139752A1 FR7120199A FR7120199A FR2139752A1 FR 2139752 A1 FR2139752 A1 FR 2139752A1 FR 7120199 A FR7120199 A FR 7120199A FR 7120199 A FR7120199 A FR 7120199A FR 2139752 A1 FR2139752 A1 FR 2139752A1
Authority
FR
France
Prior art keywords
soln
sulphite
magnesium
effluent
recycled
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.)
Withdrawn
Application number
FR7120199A
Other languages
French (fr)
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.)
Chemical Construction Corp
Original Assignee
Chemical Construction Corp
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 Chemical Construction Corp filed Critical Chemical Construction Corp
Priority to FR7120199A priority Critical patent/FR2139752A1/en
Priority to NL7107658A priority patent/NL7107658A/xx
Publication of FR2139752A1 publication Critical patent/FR2139752A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C01B17/02—Preparation of sulfur; Purification
    • C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
    • C01B17/05—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by wet processes
    • 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
    • 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
    • C01B17/48—Sulfur dioxide; Sulfurous acid
    • C01B17/50—Preparation of sulfur dioxide
    • C01B17/60—Isolation of sulfur dioxide from gases

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (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

The SO2 contng. effluent is scrubbed with an aqs. soln. of sodium (bi)sulphite whereby the sulphite is (partially) converted to bisulphate by the adsorbed SO2. The resultant soln. is divided and part contacted with alkali pref. magnesium (hydro)oxide to regenerate sodium sulphite and ppte magnesium sulphate which is removed by filtration. The filtrate is combined with the second portion of divided soln. and recycled as scrubbing medium. The solid magnesium sulphite is mixed with coke and calcined at 400-900 degrees C to recover elemental S and MgO (recycled). The process is cheap and efficiency, removing 99% SO2 and permitting efficient subsequent recover of the S-content. Particulate material in the effluent is also scrubbed out and sepd. by filtration from the soln. prior to the alkali treatment.
FR7120199A 1971-06-03 1971-06-03 Removal of sulfur dioxide from waste gases Withdrawn FR2139752A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7120199A FR2139752A1 (en) 1971-06-03 1971-06-03 Removal of sulfur dioxide from waste gases
NL7107658A NL7107658A (en) 1971-06-03 1971-06-03

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7120199A FR2139752A1 (en) 1971-06-03 1971-06-03 Removal of sulfur dioxide from waste gases

Publications (1)

Publication Number Publication Date
FR2139752A1 true FR2139752A1 (en) 1973-01-12

Family

ID=9078077

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7120199A Withdrawn FR2139752A1 (en) 1971-06-03 1971-06-03 Removal of sulfur dioxide from waste gases

Country Status (2)

Country Link
FR (1) FR2139752A1 (en)
NL (1) NL7107658A (en)

Also Published As

Publication number Publication date
NL7107658A (en) 1972-12-05

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Legal Events

Date Code Title Description
ST Notification of lapse