GB1320850A - Process for the recovery of sulphur dioxide from waste gas - Google Patents

Process for the recovery of sulphur dioxide from waste gas

Info

Publication number
GB1320850A
GB1320850A GB1803271A GB1320850DA GB1320850A GB 1320850 A GB1320850 A GB 1320850A GB 1803271 A GB1803271 A GB 1803271A GB 1320850D A GB1320850D A GB 1320850DA GB 1320850 A GB1320850 A GB 1320850A
Authority
GB
United Kingdom
Prior art keywords
gas
recycling
give
precipitate
waste gas
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
GB1803271A
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 claimed from GB1803273A external-priority patent/GB1333619A/en
Publication of GB1320850A publication Critical patent/GB1320850A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/48—Sulfites
    • 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
    • C01B17/02—Preparation of sulfur; Purification
    • C01B17/06—Preparation of sulfur; Purification from non-gaseous sulfides or materials containing such sulfides, e.g. ores
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F5/00—Compounds of magnesium
    • C01F5/42—Magnesium sulfites

Abstract

1320850 Removing SO 2 from gases CHEMICAL CONSTRUCTION CORP 28 May 1971 18032/71 Heading C1A SO 2 is removed from waste gas by scrubbing the gas with aqueous Na 2 SO 3 , regenerating part of the resulting NaHSO 3 solution with Na 2 CO 3 and recycling it, adding solid CaCO 3 and/or MgCO 3 to the remainder to precipitate CaSO 3 / MgSO 3 and recycling the Na 2 CO 3 so formed, and heating the precipitate to form CaO/MgO. The waste gas may be flue gas or H 2 SO 4 off-gas. Scrubbing may be effected at 50-90‹ C. If the gas contains SO 3 , sulphates are also formed. Entrained fly ash may be separated before or after division of the NaHSO 3 stream. The carbonate may be added as dolomite, limestone, dolomitic limestone, or magnesite. The sulphite precipitate may be (a) heated with coal or coke to give sulphur vapour which may be condensed or scrubbed with solvent, or (b) calcined at 400-1200‹ C. to give SO 2 gas which may be fed to an H 2 SO 4 plant, cooled to liquid SO 2 , or reacted with CO to give S vapour. The Na 2 CO 3 solution may be evaporated to a slurry or solid before recycling. The oxide product may be hydrated.
GB1803271A 1971-05-28 1971-05-28 Process for the recovery of sulphur dioxide from waste gas Expired GB1320850A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1803273A GB1333619A (en) 1970-07-17 1971-05-28 Pharmaceutical compositions comprising 1-h or 2-h-indazolone-3 derivatives
DE19712127133 DE2127133A1 (en) 1971-05-28 1971-06-01 Process for removing sulfur dioxide

Publications (1)

Publication Number Publication Date
GB1320850A true GB1320850A (en) 1973-06-20

Family

ID=25761208

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1803271A Expired GB1320850A (en) 1971-05-28 1971-05-28 Process for the recovery of sulphur dioxide from waste gas

Country Status (2)

Country Link
DE (1) DE2127133A1 (en)
GB (1) GB1320850A (en)

Also Published As

Publication number Publication date
DE2127133A1 (en) 1972-12-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PLNP Patent lapsed through nonpayment of renewal fees