FR2222123A1 - Nitrogen oxides removed from a gas - by absorption in sulphuric acid and conversion to nitrogen and water - Google Patents

Nitrogen oxides removed from a gas - by absorption in sulphuric acid and conversion to nitrogen and water

Info

Publication number
FR2222123A1
FR2222123A1 FR7409514A FR7409514A FR2222123A1 FR 2222123 A1 FR2222123 A1 FR 2222123A1 FR 7409514 A FR7409514 A FR 7409514A FR 7409514 A FR7409514 A FR 7409514A FR 2222123 A1 FR2222123 A1 FR 2222123A1
Authority
FR
France
Prior art keywords
nitrogen
gas
absorption
conversion
water
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
FR7409514A
Other languages
French (fr)
Other versions
FR2222123B3 (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.)
Eli Lilly and Co
Original Assignee
Eli Lilly and Co
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 Eli Lilly and Co filed Critical Eli Lilly and Co
Publication of FR2222123A1 publication Critical patent/FR2222123A1/en
Application granted granted Critical
Publication of FR2222123B3 publication Critical patent/FR2222123B3/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)

Abstract

The gas contains >=1 mole NO2 per mole NO, and through it is passed a >=80% soln. of H2SO4. After the H2SO4 is passed, NH3(NH4)2SO4, urea, or sulphamic acid is opt added to the acid to react with the absorbed N oxides followed by heating to 125-275 degrees C to convert the N oxides to N2 gas and H2O. The N oxides are readily absorbed by the H2SO4 and the products are innocuous.
FR7409514A 1973-03-23 1974-03-20 Nitrogen oxides removed from a gas - by absorption in sulphuric acid and conversion to nitrogen and water Granted FR2222123A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US34431773A 1973-03-23 1973-03-23

Publications (2)

Publication Number Publication Date
FR2222123A1 true FR2222123A1 (en) 1974-10-18
FR2222123B3 FR2222123B3 (en) 1977-01-07

Family

ID=23350010

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7409514A Granted FR2222123A1 (en) 1973-03-23 1974-03-20 Nitrogen oxides removed from a gas - by absorption in sulphuric acid and conversion to nitrogen and water

Country Status (6)

Country Link
JP (1) JPS49127888A (en)
BE (1) BE812538A (en)
BR (1) BR7402274D0 (en)
FR (1) FR2222123A1 (en)
IL (1) IL44334A0 (en)
RO (1) RO65791A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0653236A1 (en) * 1993-11-15 1995-05-17 Bayer Ag Purification of alkyl nitrite containing exhaust gases

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113184815B (en) * 2020-10-29 2023-08-15 江苏方圆芳纶研究院有限公司 Method for preparing nitrified mixed acid by using nitrogen oxides

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0653236A1 (en) * 1993-11-15 1995-05-17 Bayer Ag Purification of alkyl nitrite containing exhaust gases
US5562887A (en) * 1993-11-15 1996-10-08 Bayer Aktiengesellschaft Purification of alkyl nitrite-containing exhaust gases

Also Published As

Publication number Publication date
FR2222123B3 (en) 1977-01-07
BE812538A (en) 1974-09-20
RO65791A (en) 1978-12-15
BR7402274D0 (en) 1974-11-19
IL44334A0 (en) 1974-06-30
JPS49127888A (en) 1974-12-06

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Legal Events

Date Code Title Description
ST Notification of lapse