GB1593743A - Nitritenitrate oxidation process - Google Patents

Nitritenitrate oxidation process Download PDF

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Publication number
GB1593743A
GB1593743A GB15350/80A GB1535080A GB1593743A GB 1593743 A GB1593743 A GB 1593743A GB 15350/80 A GB15350/80 A GB 15350/80A GB 1535080 A GB1535080 A GB 1535080A GB 1593743 A GB1593743 A GB 1593743A
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GB
United Kingdom
Prior art keywords
alkali metal
aqueous medium
process according
oxidation
nitrate
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
GB15350/80A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1593743A publication Critical patent/GB1593743A/en
Expired legal-status Critical Current

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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
    • 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
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • 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
    • B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • 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)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Gas Separation By Absorption (AREA)

Description

PATENT SPECIFICATION ( 11) 1593743
( 21) Application No 15350/80 ( 22) Filed 16 Aug 1977 ( 19) ( 62) Divided out of No 1 593 742 t 4 ( 31) Convention Application Nos 714793 ( 32) Filed 16 Aug 1976,4 ' k 804620 8 June 11977 in Mt ( 33) United States of America (US) < ( 44) Complete Specification published 22 July 1981 _ ( 51) INT CL 3 C Ol D 9/00 ( 52) Index at acceptance CIA D 28 G 1 G 1 D 28 G 49 G 49 D 28 PB 5 ( 72) Inventor HAL BLUFORD HARRISON COOPER ( 54) NITRITE-NITRATE OXIDATION PROCESS ( 71) I, HAL BLUFORD HARRISON CooPER, citizen of the U S A of 4234 Chevy Chase Drive, Flintridge, California 91011, United States of America, do hereby declare the invention, for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly
described in and by the following statement:-
This invention relates to a process for converting an alkali metal nitrite to an alkali metal nitrate by oxidation in an aqueous medium Patent Application No 34033/77 (Serial No 1593742) describes a process for removal of nitrogen oxides from gases containing them in which there is obtained an aqueous product medium containing alkali metal nitrite It is desired, in the process of application No 34033/77 to convert the alkali metal nitrite, at least in part to metal nitrate.
This invention provides a process for converting an alkali metal nitrite to an alkali metal nitrate by oxidation within an aqueous medium having a p H of at least 9, the aqueous medium also including an alkali metal carbonate bicabonali, the oxidation process comprising lowering the p H of the aqueous medium to less than 9 and adding a oxidant to the aqueous medium so that the alkali metal nitrite is oxidized to alkali metal nitrate.
Lowering of the p H is preferably achieved by adding carbon dioxide to the aqueous medium, the carbon dioxide preferably having been derived by decarbonation of the bicarbonates used in the process of application No.
34033/77, (Serial No 1593742).
The process preferably forms a stage of the process described in application No 34033/77 which specification more fully describes the present invention, (Serial No 1593742).

Claims (4)

WHAT WE CLAIM IS:-
1 A process for converting an alkali metal nitrite to an alkali metal nitrate by oxidation within an aqueous medium having a p H of at least 9, said aqueous medium including an alkali metal carbonate/bicarbonate, said oxidation process comprising:
(a) lowering the p H of said aqueous medium to less than 9; and (b) adding an oxidant to said aqueous medium whereby said alkali metal nitrite is oxidized to alkali metal nitrate.
2 A process according to claim 1, wherein said alkali metal nitrate is recovered by crystallization.
3 A process according to claim 1 or claim 2 wherein the lowering of the p H is achieved by adding carbon dioxide to said aqueous medium.
4 A process according to any one of claims 1 to 3 wherein the alkali metal is potassium.
A process according to any one of claims 1 to 4 wherein the oxidant is selected from the group consisting of hydrogen peroxide, chlorine, chlorine dioxide and alkali metal hypochlorite.
REDDIE & GROSE, Agents for the Applicants, 16 Theobalds Road, London, WC 1 X 8 PL.
Printed for Her Majesty's Stationery Office by Burgess & Son (Abingdon), Ltd -1981.
Published at The Patent Office, 25 Southampton Buildings, London, WC 2 A l AY, from which copies may be obtained.
GB15350/80A 1976-08-16 1977-08-16 Nitritenitrate oxidation process Expired GB1593743A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US71479376A 1976-08-16 1976-08-16
US80462077A 1977-06-08 1977-06-08

Publications (1)

Publication Number Publication Date
GB1593743A true GB1593743A (en) 1981-07-22

Family

ID=27109214

Family Applications (4)

Application Number Title Priority Date Filing Date
GB34033/77A Expired GB1593742A (en) 1976-08-16 1977-08-16 Removal of contaminant oxides from gas mixtures
GB15351/80A Expired GB1593744A (en) 1976-08-16 1977-08-16 Removal of sulphur dioxide from gas mixtures
GB15352/80A Expired GB1593745A (en) 1976-08-16 1977-08-16 Removal of sulphur dioxide from gas mixtures
GB15350/80A Expired GB1593743A (en) 1976-08-16 1977-08-16 Nitritenitrate oxidation process

Family Applications Before (3)

Application Number Title Priority Date Filing Date
GB34033/77A Expired GB1593742A (en) 1976-08-16 1977-08-16 Removal of contaminant oxides from gas mixtures
GB15351/80A Expired GB1593744A (en) 1976-08-16 1977-08-16 Removal of sulphur dioxide from gas mixtures
GB15352/80A Expired GB1593745A (en) 1976-08-16 1977-08-16 Removal of sulphur dioxide from gas mixtures

Country Status (6)

Country Link
JP (1) JPS5328558A (en)
AU (2) AU516135B2 (en)
CA (1) CA1129628A (en)
DE (1) DE2736768A1 (en)
ES (2) ES461638A1 (en)
GB (4) GB1593742A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3220403C1 (en) * 1982-05-29 1983-11-17 Buckau-Walther AG, 4048 Grevenbroich Process for removing acidic components and nitrogen oxides from exhaust gases
DE3233316A1 (en) * 1982-09-08 1984-03-08 Buckau-Walther AG, 4048 Grevenbroich METHOD FOR REMOVING STICKOXYDES FROM EXHAUST GASES
US4619608A (en) * 1984-05-15 1986-10-28 Isca Management Limited Process for removal of pollutants from waste gas emissons
JPH03161298A (en) * 1989-11-15 1991-07-11 Yamato Sewing Mach Seizo Kk Round blade cutting machine and cutting method
FR2700774A1 (en) * 1993-01-27 1994-07-29 Saggio Nicolino Method for reducing the emission of carbon dioxide and other gases by internal combustion engines and particularly reciprocating engines with an air-petrol mixture
CA2937108A1 (en) * 2014-01-17 2015-07-23 Skyonic Corporation Acid gas removal from a gaseous stream
CN110267729B (en) * 2016-12-21 2022-10-14 Isca管理有限公司 Removal of greenhouse gases and heavy metals from emission streams
CN113348030A (en) * 2019-01-28 2021-09-03 乔治·罗伯特·理查森 CO2、NOxAnd SO2Chemical sealing of

Also Published As

Publication number Publication date
JPS5328558A (en) 1978-03-16
AU6726381A (en) 1981-07-02
CA1129628A (en) 1982-08-17
ES472199A1 (en) 1979-10-01
AU516135B2 (en) 1981-05-21
GB1593745A (en) 1981-07-22
AU2794477A (en) 1979-02-22
GB1593742A (en) 1981-07-22
ES461638A1 (en) 1978-11-16
GB1593744A (en) 1981-07-22
DE2736768A1 (en) 1978-02-23

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee