FR2246300A1 - Nitrogen mono- and di-oxides removal from gas - by contact with acid aq. chlorate soln. and (alkaline) aq. soln. avoids sec. pollution - Google Patents

Nitrogen mono- and di-oxides removal from gas - by contact with acid aq. chlorate soln. and (alkaline) aq. soln. avoids sec. pollution

Info

Publication number
FR2246300A1
FR2246300A1 FR7433076A FR7433076A FR2246300A1 FR 2246300 A1 FR2246300 A1 FR 2246300A1 FR 7433076 A FR7433076 A FR 7433076A FR 7433076 A FR7433076 A FR 7433076A FR 2246300 A1 FR2246300 A1 FR 2246300A1
Authority
FR
France
Prior art keywords
soln
acid
gas
chlorate
sec
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.)
Granted
Application number
FR7433076A
Other languages
French (fr)
Other versions
FR2246300B1 (en
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.)
Hodogaya Chemical Co Ltd
Original Assignee
Hodogaya Chemical Co Ltd
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 Hodogaya Chemical Co Ltd filed Critical Hodogaya Chemical Co Ltd
Publication of FR2246300A1 publication Critical patent/FR2246300A1/en
Application granted granted Critical
Publication of FR2246300B1 publication Critical patent/FR2246300B1/fr
Granted 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
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides

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)
  • Gas Separation By Absorption (AREA)

Abstract

N oxides are removed from gas mixts. by contact with (a) an acid aq. chlorate soln. (I) and then (b) water, an aq. soln. or dispersion (II) of a basic cpd. (III) or an alkaline aq. soln. or dispersion of a reducing cpd. (IV). Pref. (I) contains NaClO2, KClO3, NH4ClO3, Ca(ClO3)2 or Ba(ClO3)2 in a concn. of 0.01-3.0 wt.% is acidified with 1-80 wt.% inorg. acid and opt. contains 2-40 g/l alkali metal chloride. (III) can be NaOH, KOH, Na2CO3, CaCO3, NH3 or Ca(OH)2 and (IV) an alkali metal sulphide or sulphite or H2O2, (II) contg. 1-40 g/l (IIIe and/or 0.1-10 g/l (IV). Method is used for the treatment of gas contg. N mono-and other oxides and opt. SO2. The process gives improved efficiency at lower cost and gives no waste liquor which leads to sec. pollution.
FR7433076A 1973-10-03 1974-10-01 Nitrogen mono- and di-oxides removal from gas - by contact with acid aq. chlorate soln. and (alkaline) aq. soln. avoids sec. pollution Granted FR2246300A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48110437A JPS5834174B2 (en) 1973-10-03 1973-10-03 Chitsusosankabutsunojiyokiyohouhou

Publications (2)

Publication Number Publication Date
FR2246300A1 true FR2246300A1 (en) 1975-05-02
FR2246300B1 FR2246300B1 (en) 1979-03-16

Family

ID=14535691

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7433076A Granted FR2246300A1 (en) 1973-10-03 1974-10-01 Nitrogen mono- and di-oxides removal from gas - by contact with acid aq. chlorate soln. and (alkaline) aq. soln. avoids sec. pollution

Country Status (3)

Country Link
JP (1) JPS5834174B2 (en)
DE (1) DE2447202B2 (en)
FR (1) FR2246300A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5118973A (en) * 1974-08-07 1976-02-14 Osaka Soda Co Ltd Shokyakurohaigasuno shorihoho
DE2804196A1 (en) * 1978-02-01 1979-08-02 Heinz Hoelter Purificn. of exhaust gas obtd. esp. from power stations - via two stage scrubbing for effective removal of nitrogen oxide(s)

Also Published As

Publication number Publication date
DE2447202A1 (en) 1975-04-24
JPS5061372A (en) 1975-05-26
JPS5834174B2 (en) 1983-07-25
FR2246300B1 (en) 1979-03-16
DE2447202B2 (en) 1978-05-03

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