FR2278384A1 - Detoxification of gases contg hydrogen cyanide and nitrous gas - by absorption in conc. sulphuric acid and conversion to harmlessprods - Google Patents

Detoxification of gases contg hydrogen cyanide and nitrous gas - by absorption in conc. sulphuric acid and conversion to harmlessprods

Info

Publication number
FR2278384A1
FR2278384A1 FR7522177A FR7522177A FR2278384A1 FR 2278384 A1 FR2278384 A1 FR 2278384A1 FR 7522177 A FR7522177 A FR 7522177A FR 7522177 A FR7522177 A FR 7522177A FR 2278384 A1 FR2278384 A1 FR 2278384A1
Authority
FR
France
Prior art keywords
detoxification
nitrous gas
harmlessprods
conc
absorption
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Withdrawn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
FR7522177A
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.)
FAIRTEC AG
Original Assignee
FAIRTEC AG
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 FAIRTEC AG filed Critical FAIRTEC AG
Publication of FR2278384A1 publication Critical patent/FR2278384A1/en
Withdrawn legal-status Critical Current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

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)
  • Incineration Of Waste (AREA)

Abstract

The detoxification of gases contg. HCN and/or nitrous gas is achieved by absorbing these on at least 60, pref. 80-95% H2SO4 and converting them to harmless prods. If the nitrous gas content exceeds that of HCN, NH4 cpds. pref. are added. The process is simple and safe in operations. It is esp. useful for processing waste contg. cyanides and nitrites, e.g. hardening shop waste. The prods. formed are N2, H2O, CO2 and CO, which can be burned.
FR7522177A 1974-07-17 1975-07-16 Detoxification of gases contg hydrogen cyanide and nitrous gas - by absorption in conc. sulphuric acid and conversion to harmlessprods Withdrawn FR2278384A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH984574 1974-07-17

Publications (1)

Publication Number Publication Date
FR2278384A1 true FR2278384A1 (en) 1976-02-13

Family

ID=4356282

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7522177A Withdrawn FR2278384A1 (en) 1974-07-17 1975-07-16 Detoxification of gases contg hydrogen cyanide and nitrous gas - by absorption in conc. sulphuric acid and conversion to harmlessprods

Country Status (3)

Country Link
JP (1) JPS5134870A (en)
DE (1) DE2531721A1 (en)
FR (1) FR2278384A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0341565A2 (en) * 1988-05-13 1989-11-15 Chemie Linz Gesellschaft m.b.H. Process for the selective removal and destruction of hydrogen cyanide from nitrose containing gases

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4189307A (en) * 1978-06-26 1980-02-19 Texaco Development Corporation Production of clean HCN-free synthesis gas

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0341565A2 (en) * 1988-05-13 1989-11-15 Chemie Linz Gesellschaft m.b.H. Process for the selective removal and destruction of hydrogen cyanide from nitrose containing gases
EP0341565A3 (en) * 1988-05-13 1991-02-06 Chemie Linz Gesellschaft m.b.H. Process for the selective removal and destruction of hydrogen cyanide from nitrose containing gases

Also Published As

Publication number Publication date
DE2531721A1 (en) 1976-02-05
JPS5134870A (en) 1976-03-24

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Legal Events

Date Code Title Description
ST Notification of lapse