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 harmlessprodsInfo
- 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- Withdrawn
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.
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)
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)
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 |
-
1975
- 1975-07-16 FR FR7522177A patent/FR2278384A1/en not_active Withdrawn
- 1975-07-16 DE DE19752531721 patent/DE2531721A1/en active Pending
- 1975-07-17 JP JP50088209A patent/JPS5134870A/en active Pending
Cited By (2)
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 |