GB1241576A - Treatment of gases containing "no" - Google Patents

Treatment of gases containing "no"

Info

Publication number
GB1241576A
GB1241576A GB4037168A GB4037168A GB1241576A GB 1241576 A GB1241576 A GB 1241576A GB 4037168 A GB4037168 A GB 4037168A GB 4037168 A GB4037168 A GB 4037168A GB 1241576 A GB1241576 A GB 1241576A
Authority
GB
United Kingdom
Prior art keywords
gas
further gas
waste
inlet
absorber
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
GB4037168A
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.)
Mitsubishi Heavy Industries Ltd
Ube Corp
Original Assignee
Mitsubishi Heavy Industries Ltd
Ube Industries 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 Mitsubishi Heavy Industries Ltd, Ube Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of GB1241576A publication Critical patent/GB1241576A/en
Expired 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

1,241,576. Removing nitric oxide from waste gases. MITSUBISHI JUKOGYO K.K. and UBE INDUSTRIES Ltd. 23 Aug., 1968 [24 Aug., 1967], No. 40371/68. Heading C1A. A method of treating a waste gas containing NO comprises providing a further gas having a high content of NO 2 , admitting the waste gas and a first portion of the further gas to a first inlet of an absorber containing an alkaline absorbent solution, and admitting at least one further portion of the further gas to at least one further inlet of the absorber downstream of the first inlet. Suitable absorbents are caustic soda, sodium carbonate, calcium hydroxide, ammonia and ammonium carbonate, and the ratio of NO 2 to NO in the absorber is preferably 1: 1 or more by volume, the absorption product then being the corresponding nitrite. The further gas rich in NO 2 may be provided by separating a portion of the waste gas and oxidizing its NO content to NO 2 using oxygen present in the waste gas or added air or oxygen, and using an active carbon or silica gel catalyst if required. Alternatively when used to treat the waste gases from the production of nitric acid by the absorption of ammonia oxidation products, a portion of the ammonia oxidation products may be passed to a tank where, on standing, the NO content is oxidized to NO 2 to produce the further gas rich in NO 2 . In a third alternative method, the further gas rich in NO 2 is produced by treating the ammonium nitrite solution formed by absorption of the NO/NO 2 mixture with nitric or sulphuric acid in the presence of oxygen.
GB4037168A 1967-08-24 1968-08-23 Treatment of gases containing "no" Expired GB1241576A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5433867 1967-08-24

Publications (1)

Publication Number Publication Date
GB1241576A true GB1241576A (en) 1971-08-04

Family

ID=12967801

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4037168A Expired GB1241576A (en) 1967-08-24 1968-08-23 Treatment of gases containing "no"

Country Status (4)

Country Link
CA (1) CA926590A (en)
DE (1) DE1792343A1 (en)
FR (1) FR1578561A (en)
GB (1) GB1241576A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT392737B (en) * 1990-01-31 1991-05-27 Schmid Peter J Process for removing oxides of nitrogen from gases
AT393096B (en) * 1989-10-25 1991-08-12 Schmid Peter J Process for removing oxides of nitrogen from gases
CN109621714A (en) * 2018-12-29 2019-04-16 盐城工学院 A kind of flue-gas denitration process method generating precipitating

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2551990B1 (en) * 1983-09-21 1985-12-13 Rhone Poulenc Chim Base PROCESS FOR TREATING A GASEOUS STREAM CONTAINING NITROGEN OXIDES

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT393096B (en) * 1989-10-25 1991-08-12 Schmid Peter J Process for removing oxides of nitrogen from gases
AT392737B (en) * 1990-01-31 1991-05-27 Schmid Peter J Process for removing oxides of nitrogen from gases
CN109621714A (en) * 2018-12-29 2019-04-16 盐城工学院 A kind of flue-gas denitration process method generating precipitating
CN109621714B (en) * 2018-12-29 2022-01-18 盐城工学院 Flue gas denitration process method for generating precipitate

Also Published As

Publication number Publication date
CA926590A (en) 1973-05-22
FR1578561A (en) 1969-08-14
DE1792343A1 (en) 1972-05-18

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