GB1593744A - Removal of sulphur dioxide from gas mixtures - Google Patents

Removal of sulphur dioxide from gas mixtures Download PDF

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Publication number
GB1593744A
GB1593744A GB15351/80A GB1535180A GB1593744A GB 1593744 A GB1593744 A GB 1593744A GB 15351/80 A GB15351/80 A GB 15351/80A GB 1535180 A GB1535180 A GB 1535180A GB 1593744 A GB1593744 A GB 1593744A
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GB
United Kingdom
Prior art keywords
alkali metal
sulfite
sulfate
aqueous medium
process according
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
GB15351/80A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1593744A publication Critical patent/GB1593744A/en
Expired legal-status Critical Current

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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
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • 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
    • 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
    • B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • 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)
  • Gas Separation By Absorption (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Description

PATENT SPECIFIC 2
( 21) Application No 15351/80 ( 22) Filed 16 ( 62) Divided Out of No 1 593 742 ( 31) Convention Application Nos 714 793 ( 32) 804 620 ( 33) United States of America (US) ( 44) Complete Specification published 22 July 1981 ( 51) INT CL 3 BOID 53/34 ATION Aug 1977 ( 19) ( 11) Filed 16 Aug 1976 8 June 1977 in ( 52) Index at acceptance CIA 5181 518 Y 5221 5222 522 Y 5410 5412 5413 541 Y 544 Y 5450 5451 5471 548 X 5491 5492 5642 5681 5682 SB ( 72) Inventor HAL BLUFORD HARRISON COOPER ( 54) REMOVAL OF SULFUR DIOXIDE FROM GAS MIXTURES ( 71) I, HAL BLUFORD HARRISON CooPER, a citizen of the U S A of 4234 Chevy Chase Drive, Flintridge, California 91011, United States of America, do hereby declare the invention, for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly described in and by the following
statement:-
This invention relates to a process for the removal of sulfur dioxide from gas mixtures containing the same.
According to the Wellman-Lord system for separating sulfur dioxide from combustion gases the sulfur dioxide is converted into an alkali metal or alkali earth metal bisulfite by passage through a metal sulfite solution following which the metal bisulfite is decomposed thermally to form sulfur dioxide and sodium sulfite which is recycled to the process.
This invention provides a process for removing oxides of sulfur from a gas mixture including carbon dioxide and sulfur dioxide, comprising:
(a) treating said gas mixture with an aqueous medium which includes an alkali metal sulfite to form a product aqueous medium which includes alkali metal bisulfite; (b) reacting said product aqueous medium with an alkali metal carbonate and/or alkali metal bicarbonate, to convert said alkali metal bisulfite to alkali metal sulfite; (c) oxidizing said converted alkali metal sulfite to alkali metal sulfate; and (d) recovering said alkali metal sulfate.
The process of the invention provides a removal efficiency of the order of 99 % whereas the Wellman-Lord process can only reach a practical maximum of about 90 %.
Moreover, the new process can form an initial stage of a process for removing nitrogen oxide from a gas mixture containing both sulfur dioxide and nitrogen oxide as described and claimed in patent Application No.
34033/77, (Serial No 1593742) the alkali metal carbonate/bicarbonate used in the first stage of that process serving to convert alkali metal bisulfite to alkali metal sulfite and, if desired the oxidant which is concomitantly used with the carbonate/bicarbonate solution serving to oxidize the sulfite to sulfate.
As disclosed in patent Application No.
34033/77 (Serial No 1593742) the alkali metal sulfate resulting from oxidation of the sulfite is preferably recovered by crystallization and the oxidant is preferably hydrogen peroxide or an oxygen containing gas.
General methods of operating the process of this invention are given in Application No.
34033/77, (Serial No 1593742).

Claims (4)

WHAT WE CLAIM IS:-
1 A process for removing oxides of sulfur from a gas mixture including carbon dioxide and sulfur dioxide, comprising:
(a) treating said gas mixture with an aqueous medium which includes an alkali metal sulfite to form a product aqueous medium which includes alkali metal bisulfite; (b) reacting said product aqueous medium with an alkali metal carbonate and/or alkali bicarbonate, to convert said alkali metal bisulfite to alkali metal sulfite; (c) oxidizing said converted alkali metal sulfite to alkali metal sulfate; and (d) recovering said alkali metal sulfate.
2 A process according to claim 1 wherein said alkali metal sulfate is recovered by crystallization.
3 A process according to claim 1 or claim 2 wherein said alkali metal sulfite is oxidized to alkali metal sulfate using hydrogen peroxide.
4 A process according to claim 1 or claim 2 wherein said alkali metal sulfite is oxidized to alkali metal sulfate using an oxygen-containing gas.
REDDIE & GROSE, Agents for the Applicants, 16 Theobalds Road, London, WC 1 X 8 PL.
Printed for Her Majesty's Stationery Office by Burgess & Son (Abingdon), Ltd -1981.
Published at The Patent Office, 25 Southampton Buildings, London, WC 2 A l AY, from which copies may be obtained.
1 593 744
GB15351/80A 1976-08-16 1977-08-16 Removal of sulphur dioxide from gas mixtures Expired GB1593744A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US71479376A 1976-08-16 1976-08-16
US80462077A 1977-06-08 1977-06-08

Publications (1)

Publication Number Publication Date
GB1593744A true GB1593744A (en) 1981-07-22

Family

ID=27109214

Family Applications (4)

Application Number Title Priority Date Filing Date
GB34033/77A Expired GB1593742A (en) 1976-08-16 1977-08-16 Removal of contaminant oxides from gas mixtures
GB15352/80A Expired GB1593745A (en) 1976-08-16 1977-08-16 Removal of sulphur dioxide from gas mixtures
GB15351/80A Expired GB1593744A (en) 1976-08-16 1977-08-16 Removal of sulphur dioxide from gas mixtures
GB15350/80A Expired GB1593743A (en) 1976-08-16 1977-08-16 Nitritenitrate oxidation process

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB34033/77A Expired GB1593742A (en) 1976-08-16 1977-08-16 Removal of contaminant oxides from gas mixtures
GB15352/80A Expired GB1593745A (en) 1976-08-16 1977-08-16 Removal of sulphur dioxide from gas mixtures

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB15350/80A Expired GB1593743A (en) 1976-08-16 1977-08-16 Nitritenitrate oxidation process

Country Status (6)

Country Link
JP (1) JPS5328558A (en)
AU (2) AU516135B2 (en)
CA (1) CA1129628A (en)
DE (1) DE2736768A1 (en)
ES (2) ES461638A1 (en)
GB (4) GB1593742A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3220403C1 (en) * 1982-05-29 1983-11-17 Buckau-Walther AG, 4048 Grevenbroich Process for removing acidic components and nitrogen oxides from exhaust gases
DE3233316A1 (en) * 1982-09-08 1984-03-08 Buckau-Walther AG, 4048 Grevenbroich METHOD FOR REMOVING STICKOXYDES FROM EXHAUST GASES
US4619608A (en) * 1984-05-15 1986-10-28 Isca Management Limited Process for removal of pollutants from waste gas emissons
JPH03161298A (en) * 1989-11-15 1991-07-11 Yamato Sewing Mach Seizo Kk Round blade cutting machine and cutting method
FR2700774A1 (en) * 1993-01-27 1994-07-29 Saggio Nicolino Method for reducing the emission of carbon dioxide and other gases by internal combustion engines and particularly reciprocating engines with an air-petrol mixture
EP3094401A4 (en) * 2014-01-17 2017-08-09 Skyonic Corporation Acid gas removal from a gaseous stream
CA3047845C (en) 2016-12-21 2023-04-11 Isca Management Ltd. Removal of greenhouse gases and heavy metals from an emission stream
EP3914376A4 (en) * 2019-01-28 2023-02-15 Richardson, Robert George Chemical sequestering of co2, nox and so2

Also Published As

Publication number Publication date
GB1593742A (en) 1981-07-22
ES472199A1 (en) 1979-10-01
ES461638A1 (en) 1978-11-16
JPS5328558A (en) 1978-03-16
DE2736768A1 (en) 1978-02-23
AU2794477A (en) 1979-02-22
CA1129628A (en) 1982-08-17
AU516135B2 (en) 1981-05-21
GB1593743A (en) 1981-07-22
AU6726381A (en) 1981-07-02
GB1593745A (en) 1981-07-22

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Legal Events

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PCNP Patent ceased through non-payment of renewal fee